Amphidromous shrimps (Decapoda: Caridea): current knowledge and future research - de Mazancourt, Valentin; Ravaux, Juliette (Journal of Crustacean Biology, 2024)

Ancestors’ Gift: Parental Early Exposure to the Environmentally Realistic Pesticide Mixture Drives Offspring Phenotype in a Larger Extent Than Direct Exposure in the Pacific Oyster, Crassostrea gigas - Sol-Dourdin, Thomas; Guyomard, Killian; Rabiller, Manuella; Houssais, Nina; Cormier, Alexandre; Le Monier, Pauline; Sussarellu, Rossana; Guillaume Rivière (Environmental Science & Technology, 2024)

Demography of endangered juvenile green turtles in face of environmental changes: 10 years of capture-mark-recapture efforts in Martinique - Lelong, Pierre; Besnard, Aurélien; Girondot, Marc; Habold, Caroline; Priam, Fabienne; Giraudeau, Mathieu; Le Loc'h, Guillaume; Le Loc'h, Aurélie; Fournier, Pascal; Fournier-Chambrillon, Christine; Bustamante, Paco; Dupont, Sophie M.; et al. (Biological Conservation, 2024)

Dining on corals: stable isotope evidence for close trophic connection between gall crabs (Cryptochiridae) and their stony coral hosts - Bravo, Henrique; Charlotte R. Dromard; van der Meer, Marcel T. J.; Schleimer, Anna; van der Meij, Sancia E. T. (Symbiosis, 2024)

First Record of Kemp’s Ridley Sea Turtle, Lepidochelys kempii (Garman, 1880), in the Waters of Martinique Island (Lesser Antilles) - Chevallier, Damien; Fretey, Jacques; Lescure, Jean; Girondot, Marc (Animals, 2024)

Freshwater and limno-terrestrial meiofauna of the Massane Forest Reserve in the Eastern French Pyrenees - Majdi, Nabil; Araujo, Thiago Quintao; Bekkouche, Nicolas; Fontaneto, Diego; Garrigue, Joseph; Larrieu, Laurent; Kamburska, Lyudmila; Kieneke, Alexander; Minowa, Axell Kou; Laumer, Christopher; Sabatino, Raffaella; Sorel, Diane; et al. (Biogeographia – The Journal of Integrative Biogeography, 2024)

Hydro-morphological features and functional structure of fish assemblages mediate species isotopic niches in estuaries - Teichert, Nils; Lizé, Anne; Lepage, Mario; Cabral, Henrique; Trancart, Thomas; Acou, Anthony; Larregieu, Marie; Feunteun, Eric; Carpentier, Alexandre (Estuarine, Coastal and Shelf Science, 2024)
Despite the popularity of stable isotope analysis (Carbon and Nitrogen), the drivers of species isotopic niches and their consequences on food web functioning remained poorly described, especially in estuaries. Here, we hypothesised that species niche characteristics are influenced by ecosystem hydro-morphological features and the functional structure of fish assemblages. The trophic niches of four fish species (Dicentrarchus labrax, Pomatoschistus minutus, Sprattus and Platichthys flesus) and overlap between them were compared during two consecutive autumns in eight estuarine ecosystems of the northeast Atlantic Ocean. Our findings demonstrated a relative steadiness of trophic positions of fish in estuaries, despite a high level of interspecific variability. The seabass generally occupied the higher trophic position, followed by the sand goby, while the flounder and sprat were at the lowest position in the food web. Species isotopic niches and overlap were mediated by some estuarine features, including estuary size and intertidal extent, but also by biotic interactions at the intra- and inter-specific levels, as reflected by the influence of fish abundance and functional diversity metrics. Our results support the statement that the intertidal area is a pivotal factor in regulating trophic interactions, by promoting niche partitioning and diversification of trophic resources between species. Moreover, niche size and dietary divergence of species decreased with increasing regularity of trophic strategies within assemblages, suggesting that species occupied more restricted trophic niches when they were less subjected to competition for the same food resources. These findings emphasize the importance of local conditions and the functional composition of assemblages in modulating the trophic resources consumed by fish in estuarine environments.
Keywords: Estuary; functional diversity; Isotopic niche; stable isotope; Trophic competition

An integrative taxonomic revision of the freshwater atyid shrimps (Crustacea: Decapoda: Caridea) of Micronesia - de Mazancourt, Valentin; Marquet, Gérard; Keith, Philippe (Diversity, 2024)
Twelve species of atyid shrimps are reported from three Micronesian islands (Babeldaob, Pohnpei, and Guam) and studied using a combined morphological and molecular approach. Among them, three are new records for the area (Caridina appendiculata, Caridina lobocensis, and Caridina rubella), while three new species are here described: Atyoida chacei sp. nov., Caridina ponapensis sp. nov., and Caridina rintelenorum sp. nov. Descriptions for these new species, diagnoses for poorly known species, and taxonomic notes are provided herein and their biogeography is discussed.
Keywords: 16S; amphidromy; Atyidae; DNA; island; morphology

Intraspecific genetic lineages of a marine mussel show behavioural divergence when exposed to microplastic leachates - Lorenzo Cozzolino; Nicastro, Katy R.; Hubbard, P C; Seuront, Laurent; Christopher D. McQuaid; Zardi, Gerardo I. (Environmental Pollution, 2024)

The metabolites of light: Untargeted metabolomic approaches bring new clues to understand light-driven acclimation of intertidal mudflat biofilm - Caroline Doose; Cédric Hubas (Science of The Total Environment, 2024)
The microphytobenthos (MPB), a microbial community of primary producers, play a key role in coastal ecosystem functioning, particularly in intertidal mudflats. These mudflats experience challenging variations of irradiance, forcing the micro-organisms to develop photoprotective mechanisms to survive and thrive in this dynamic environment. Two major adaptations to light are well described in literature: the excess of light energy dissipation through non-photochemical quenching (NPQ), and the vertical migration in the sediment. These mechanisms trigger considerable scientific interest, but the biological processes and metabolic mechanisms involved in light-driven vertical migration remain largely unknown. To our knowledge, this study investigates for the first time metabolomic responses of a migrational mudflat biofilm exposed for 30 min to a light gradient of photosynthetically active radiation (PAR) from 50 to 1000 μmol photons m−2 s−1. The untargeted metabolomic analysis allowed to identify metabolites involved in two types of responses to light irradiance levels. On the one hand, the production of SFAs and MUFAs, primarily derived from bacteria, indicates a healthy photosynthetic state of MPB under low light (LL; 50 and 100 PAR) and medium light (ML; 250 PAR) conditions. Conversely, when exposed to high light (HL; 500, 750 and 1000 PAR), the MPB experienced light-induced stress, triggering the production of alka(e)nes and fatty alcohols. The physiological and ecological roles of these compounds are poorly described in literature. This study sheds new light on the topic, as it suggests that these compounds may play a crucial and previously unexplored role in light-induced stress acclimation of migrational MPB biofilms. Since alka(e)nes are produced from FAs decarboxylation, these results thus emphasize for the first time the importance of FAs pathways in microphytobenthic biofilms acclimation to light.

Northeast Atlantic elasmobranch community on the move: Functional reorganization in response to climate change - Coulon, Noémie; Elliott, Sophie; Teichert, Nils; Auber, Arnaud; McLean, Matthew; Barreau, Thomas; Feunteun, Eric; Carpentier, Alexandre (Global Change Biology, 2024)
While spatial distribution shifts have been documented in many marine fishes under global change, the responses of elasmobranchs have rarely been studied, which may have led to an underestimation of their potential additional threats. Given their irreplaceable role in ecosystems and their high extinction risk, we used a 24-year time series (1997–2020) of scientific bottom trawl surveys to examine the effects of climate change on the spatial distribution of nine elasmobranch species within Northeast Atlantic waters. Using a hierarchical modeling of species communities, belonging to the joint species distribution models, we found that suitable habitats for four species increased on average by a factor of 1.6 and, for six species, shifted north-eastwards and/or to deeper waters over the past two decades. By integrating species traits, we showed changes in habitat suitability led to changes in the elasmobranchs trait composition. Moreover, communities shifted to deeper waters and their mean trophic level decreased. We also note an increase in the mean community size at maturity concurrent with a decrease in fecundity. Because skates and sharks are functionally unique and dangerously vulnerable to both climate change and fishing, we advocate for urgent considerations of species traits in management measures. Their use would make it better to identify species whose loss could have irreversible impacts in face of the myriad of anthropogenic threats.

Quantifying larval dispersal portfolio in seabass nurseries using otolith chemical signatures - Teichert, Nils; Tabouret, Hélène; Lizé, Anne; Daverat, Françoise; Acou, Anthony; Trancart, Thomas; Virag, Laure-Sarah; Pecheyran, Christophe; Feunteun, Eric; Carpentier, Alexandre (Marine Environmental Research, 2024)
The temporal asynchronies in larvae production from different spawning areas are fundamental components for ensuring stability and resilience of marine metapopulations. Such a concept, named portfolio effect, supposes that diversifying larval dispersal histories should minimize the risk of recruitment failure by increasing the probability that at least some larvae successfully settle in nursery. Here, we used a reconstructive approach based on otolith chemistry to quantify the larval dispersal portfolio of the European seabass, Dicentrarchus labrax, across six estuarine nursery areas of the northeast Atlantic Ocean. The analysis of natal and trajectory signatures indicated that larvae hatch in distinct environments and then dispersed in water masses featured by contrasting chemical signatures. While some trace elements appeared affected by temporal changes (Mn and Sr), others varied spatially during the larval stage but remained poorly affected by temporal fluctuation and fish physiology (Ba, Cu, Rb and Zn). We then proposed two diversity metrics based on richness and variations of chemical signatures among populations to reflect spatio-temporal diversity in natal origins and larval trajectories (i.e., estimates of dispersal portfolio). Along the French coast, the diversity estimates were maximum in nurseries located at proximity of offshore spawning sites and featured by complex offshore hydrodynamic contexts, such as the Mont St-Michel bay. Finally, our findings indicate that the dispersal portfolio was positively related with the local abundance of seabass juveniles, supporting the assumption that heterogeneity in dispersal history contributes to promote recruitment success in nurseries.
Keywords: Connectivity; dispersion; Dynamic time warping; Fish nursery; Larval life history; Otolith chemistry

Spatial patterns and autocorrelation challenges in ecological conservation - Goberville, Eric (Peer Community in Ecology, 2024)

Structural and functional characterization of an egg-laying hormone signaling system in a lophotrochozoan – The pacific oyster (Crassostrea gigas) - Favrel, P.; Dubos, M.P.; Bernay, B.; Pasquier, J.; Schwartz, J.; Lefranc, B.; Mouret, L.; Guillaume Rivière; Leprince, J.; Bondon, A. (General and Comparative Endocrinology, 2024)

Testing for concordance between predicted species richness, past prioritization, and marine protected area designations in the western Indian Ocean - McClanahan, Tim R.; Friedlander, Alan M.; Wickel, Julien; Graham, Nicholas A. J.; Bruggemann, J. Henrich; Guillaume, Mireille M. M.; Chabanet, P.; Porter, Sean; Schleyer, Michael H.; Azali, M. Kodia; Muthiga, N. A. (Conservation Biology, 2024)

Trace element variations in mussels' shells from continent to sea: The St. Lawrence system, Canada - Guillot, Alice; Barrat, Jean-Alix; Olivier, Frédéric; Tremblay, Rejean; Saint-Louis, Richard; Rouget, Marie-Laure; Ben Salem, Douraied (Marine Pollution Bulletin, 2024)
Rare Earth Elements (REE) and several trace elements abundances in mussel's shells collected along the St. Lawrence River, the Estuary, and the Gulf of St. Lawrence (EGSL) reveal coherent chemical variations, with a sharp contrast between freshwater and seawater bivalves. In freshwater mussel's shells, Rare Earth Elements and Y (REY) patterns are rather flat. Their Mn and Ba concentrations are higher than those of EGSL mussel shells, which are much richer in Sr. Shale-normalized REY abundances in mussel's shells from the EGSL show positive anomalies in La and Y and well-marked negative anomalies in Ce, reflecting those of seawater. Prince Edward Island shells show light REE depletion relative to PAAS, positive La and Y anomalies, and negative Ce anomalies. Our data confirm the lack of detectable Gd pollution in the St. Lawrence River and in the EGSL, as well as Pb pollution at the mouth of the Saguenay Fjord and near Rimouski.
Keywords: Rare earth elements Trace elements Estuary Bivalve Shell Environmental proxy Pollution

Tracing the fate of seabird‐derived nitrogen in a coral reef using nitrate and coral skeleton nitrogen isotopes - Choisnard, Noémie; Duprey, Nicolas Noel; Wald, Tanja; Thibault, Martin; Houlbrèque, Fanny; Foreman, Alan D.; Cuet, Pascale; Mireille M.M. Guillaume; Vonhof, Hubert; Sigman, Daniel M.; Haug, Gerald H.; Maguer, Jean‐François; et al. (Limnology and Oceanography, 2024)

Accounting for variability in life-history traits for the definition of amphidromous goby fry fisheries closure periods - Lagarde, Raphaël; Valade, Pierre; Teichert, Nils (Cybium, 2023)
Amphidromous goby fry (post-larvae and young juveniles) are traditionally fished when they arrive in rivers after their larval development at sea. In Reunion Island (Indian Ocean) two species of amphidromous goby are mainly targeted by the fisheries: the endemic Cotylopus acutipinnis and the cosmopolitan Sicyopterus lagocephalus. Despite the lack of quantitative data on these fisheries, their impact on populations is expected to be important because the catches can represent several tonnes per year. Consequently, fishery regulation changes have been proposed that increase the duration of the existing fisheries closure period of two weeks in March. We developed an approach to identify key periods for fisheries closure, including assessment of the proposed management scenario and several alternative protection scenarios, based on the maximization of fry abundance and on the variability of four life-history traits: (i) fry size and (ii) age at arrival in rivers, (iii) the time the juveniles spend in river before maturation and (iv) their migration behaviour. This approach is in seeking to preserve a high level of phenotypic diversity, which is predicted to promote population resilience. We conducted a multiple-criteria decision analysis to rank 4096 alternatives of fisheries closure periods, ranging from zero to 12 months, based on their propensity to maintain fry abundance and life history trait diversity. Finally, according to the type of fisheries closure period (discontinuous or continuous) and the proportion of annual abundance and variability of life-history traits preserved during the period (50% or 75%), we propose four different fisheries closures lasting from six to nine months.
Keywords: amphidromy; Bichiques; Conservation; diadromy; Indian Ocean; Management; recruitment

Aluminium-based galvanic anode impacts the photosynthesis of microphytobenthos and supports the bioaccumulation of metals released. - Levallois, Alexandre; Vivier, Baptiste; Caplat, Christelle; Goux, Didier; Orvain, Francis; Lebel, Jean-Marc; Claquin, Pascal; Chasselin, Léo; Basuyaux, Olivier; Serpentini, Antoine (Aquat Toxicol, 2023)
Very few studies have looked at the potential biological effects of degradation products of galvanic anodes particularly on primary producers which are central to food webs in marine ecosystems. The galvanic anode cathodic protection system (GACP) is widely used to protect submerged metallic structures from corrosion. Aluminium (Al) and zinc (Zn) are the main constituents of galvanic anodes and are therefore released in the marine environment by oxidation process to form ions or oxy-hydroxides. The main objective of our study was to evaluate the effects of the metals released from an aluminium-based galvanic anode on microphytobenthos performance in term of biofilm growing through the analysis of photosynthetic parameters, the determination of chlorophyll and extracellular polymeric substances (EPS). The bioaccumulation of Al and Zn were measured in the microphytobenthic compartment collected at the surface of polyvinyl chloride (PVC) plates exposed during 13 days to seawaters enriched in different concentrations of metals released from dissolution of one anode. Determination of bioconcentration factors confirmed that the microphytobenthos has incorporated Al. A significative effect was observed on the Chl a concentration for the higher tested concentration ([Al] = 210.1 ± 60.2 µg L  ; [Zn] = 20.2 ± 1.4 µg L  ). The seawater exposed to the anode affected the MPB productivity (ETRII) with consequences on acclimatation light (Ek), absorption cross section of PSII (σ), F/F and NPQ. Regarding the EPS production, the anode degradation presented an impact on high and low molecular weight of both carbohydrates and protein fractions of microphytobenthos suggesting that EPS play an essential role in sequestering metal contaminants to maintain the integrity of the biological membranes and the functionality of the cellular organelles. The accumulation of Al released by GACP in microphytobenthos cells could lead to physiologic problems in photosynthetic organisms.
Keywords: Aluminum; Bioaccumulation; Ecosystem; Electrodes; Photosynthesis; Water Pollutants, Chemical; Zinc

Artificial reef effectiveness changes among types as revealed by underwater hyperspectral imagery - Elisabeth Riera; Cédric Hubas; Ungermann, Mischa; Rigot, Guy; Pey, Alexis; Patrice Francour; Rossi, Fracesca (Restoration Ecology, 2023)
Artificial reefs (ARs) are designed to mimic natural habitats and promote marine life. Their effectiveness is however debatable and can depend on factors such as structural complexity and construction material. Old artificial reefs (OARs) were made of concrete mold of simple geometric shapes, limiting their ability to mimic the complexity of natural reefs. Recent advancements in three-dimentional (3D)-printing technology have enabled the creation of 3D-printed artificial reefs (3DRs) with biocompatible material and complex structures that can better simulate the natural habitats. We employed underwater hyperspectral technology to estimate the performance of these reefs and compare the benthic photosynthetic signal of natural reefs (NATs) with those of ARs (OARs and 3DRs) in coastal area of the north-western Mediterranean (France and Monaco Principality). We expected differences in reflectance signals between OARs and NATs, and signals closer to NATs in 3DRs than OARs. Underwater hyperspectral technology was able to detect higher chlorophyll-a derived signals on NATs than OARs. Moreover, the magnitude of differences between 3DRs and NATs was smaller than that between OARs and NATs. Although ARs were not capable of mimicking natural reefs, the use of 3D-printed ARs might ameliorate their effectiveness for coastal reconciliation.

Assessing the impacts of anthropogenic sounds on early stages of benthic invertebrates: The 'Larvosonic system'. - Olivier, Frédéric; Gigot, Mathilde; Mathias, Delphine; Jézéquel, Youenn; Meziane, Tarik; L'Her, Christophe; Chauvaud, Laurent; Bonnel, Julien (Limnology and Oceanography: Methods, 2023)
Noise produced by human activities has increased in the oceans over the last decades. Whereas most studies have focused on the impact of anthropogenic noise on marine mammals and ﬁshes, those focusing on marine invertebrates  are  rarer  and  more  recent,  especially  when  considering  peri-metamorphic  benthic  stages,  highly sensitive to  anthropogenic perturbations. A  careful review  of the literature reveals  a  simplistic characterization of the acoustics within the containers used to quantify larval and juvenile responses to noise, thus weakening the conclusions of such works. To address this problem, we developed the Larvosonic system, a laboratory tank equipped  with  acoustic assets  to  assess  the  impacts  of  noise  on  young  stages  of  marine  invertebrates.  We  ﬁrst provide  a  careful  analysis  of  the  tank  sound  ﬁeld  using  different  sound types,  and  we  assess  the  effects  of expanded polystyrene units on the sounds emitted by a professional audio system in order to dampen reverbera- tion  and  resonance. Then,  we  apply  this  acoustic  calibration  to  the  effects  of  both  pile  driving  and  drilling noises on postlarvae of the scallop bivalve Pecten maximus. Acoustic recordings highlight that diffuser and bass trap  components  constitute  effective  underwater  sound  absorbents,  reducing  the  reﬂection  of  the  whole  fre- quency bandwidth. Scallop experiments reveal that both type and level of the tested noise inﬂuenced postlarval growth,  with  interactive  effects  between  trophic  environment  and  noise  level/spectra. The  Larvosonic  system thus constitutes an efﬁcient tool for bioacoustics research on bentho-planktonic invertebrate species."

Beach erosion aggravates the drastic decline in marine turtle populations in French Guiana - Chevallier, Damien; Girondot, Marc; Péron, Christina; Martin, Jordan; Bonola, Marc; Chevalier, Johan; de Thoisy, Benoît; Kelle, Laurent; Le Maho, Yvon; Gardel, Antoine; Anthony, Edward J. (Regional Environmental Change, 2023)

A benchmark for computational analysis of animal behavior, using animal-borne tags - Benjamin Hoffman; Maddie Cusimano; Vittorio Baglione; Daniela Canestrari; Chevallier, Damien; Dominic L. DeSantis; Lorène Jeantet; Monique A. Ladds; Takuya Maekawa; Vicente Mata-Silva; Víctor Moreno-González; Eva Trapote; et al. (arXiv, 2023)
Animal-borne sensors (‘bio-loggers’) can record a suite of kinematic and environmental data, which can elucidate animal ecophysiology and improve conservation efforts. Machine learning techniques are useful for interpreting the large amounts of data recorded by bio-loggers, but there exists no standard for comparing the different machine learning techniques in this domain. To address this, we present the Bio-logger Ethogram Benchmark (BEBE), a collection of datasets with behavioral annotations, standardized modeling tasks, and evaluation metrics. BEBE is to date the largest, most taxonomically diverse, publicly available benchmark of this type, and includes 1654 hours of data collected from 149 individuals across nine taxa. We evaluate the performance of ten different machine learning methods on BEBE, and identify key challenges to be addressed in future work. Datasets, models, and evaluation code are made publicly available at https://github.com/earthspecies/ BEBE, to enable community use of BEBE as a point of comparison in methods development.
Keywords: Accelerometers; animal behavior; Bio-loggers; Clustering; Machine Learning; Time series

Benchmarking global biodiversity of decapod crustaceans (Crustacea: Decapoda) - De Grave, Sammy; Decock, Wim; Dekeyzer, Stefanie; Davie, Peter J F; Fransen, Charles H J M; Boyko, Christopher B; Poore, Gary C B; Macpherson, Enrique; Ahyong, Shane T; Crandall, Keith A; de Mazancourt, Valentin; Osawa, Masayuki; et al. (Journal of Crustacean Biology, 2023)

Biogeographical snapshot of life-history traits of European silver eels: insights from otolith microchemistry - Teichert, Nils; Bourillon, Bastien; Suzuki, Kyoko; Acou, Anthony; Alexandre Carpentier; Kuroki, Mari; Righton, David; Thomas Trancart; Virag, Laure-Sarah; Walker, Alan; Otake, Tsuguo; Eric Feunteun (Aquatic Sciences, 2023)
Life-history traits of eels display a high level of phenotypic plasticity in response to large-scale biogeographical drivers, as well as local conditions encountered during the continental phase. Here, we provided a biogeographical snapshot of the variability of life-history traits of eels (Anguilla anguilla), across a large proportion of their natural distribution range. Silver eels (n = 99) were collected across eleven European catchments to investigate how life-history traits vary along geographical and saline habitats, as it was inferred from the Sr:Ca ratio in otoliths. Among 13 life-history traits tested, 3 of them such as total length, body or liver weight were related to geographical coordinates. Overall, eels grow faster in southern Europe and migrate earlier suggesting that the silvering process is related to the local growth conditions more than fish age. The salinity profiles revealed by the otoliths’ Sr:Ca ratios indicate that eels with a brackish life-history generally grow faster, reach larger size-at-age, and have a better condition than eels living in freshwater. This observation associated with the lower abundance of the sanguivorous swimbladder nematode, Anguillicola crassus, confirms the importance of brackish areas for sustaining the eel production. A large proportion of the observed variation of life-history traits remained unexplained by the biogeographical trends and salinity condition, which suggests that other drivers act at the catchment scale.
Keywords: Anguilla anguilla; Biogeography; Brackish habitat; otolith; phenotypic plasticity; Sr:Ca ratio

Comparative efects of trace metal elements released from dissolution of aluminum‑based galvanic anodes, aluminum chloride, zinc chloride, and their mixture on the development of the Pacifc oyster D‑larvae, Crassostrea gigas - Levallois, A; Costil, K; Caplat, C; Basuyaux, O; Lebel, J.M.; Guégan, C; Serpentini, A. (Environmental Science and Pollution Research, 2023)
As the most abundant metal in the earth’s crust, aluminum (Al) is used in many sectors, and nowadays, there is an increase in anthropogenic releases to aquatic ecosystems. This is particularly true in the context of corrosion protection systems involving galvanic anodes, which are mostly made of Al. Corroded instead of the steel structures they protect, galvanic anodes are described as sacrifcial anodes. In contact with seawater, they undergo oxidation and release various metals in the form of ions or oxy-hydroxides into the marine environment, mainly Al and zinc (Zn). Several studies agree that Al increases the incidence of abnormal development in bivalve larvae from 150 μg L−1 which is close to the highest Al concentrations recorded in coastal waters. Therefore, we studied the impact of the cocktail of metals released by aluminum-based galvanic anodes on the development of Crassostrea gigas larvae, which we compared to the efects of aluminum chloride hexahydrate and zinc chloride alone and their mixture. The anode solution was realized thanks to an experimental device simulating the dissolution of a galvanic anode in the marine environment in order to reproduce the cocktail of metal species. We calculated an EC50 of 193.55 μg L−1 and 100.05 μg L−1 for Al and Zn chloride alone, respectively, and we highlighted an EC50 of 190.22 μg L−1 for the galvanic anode based on Al concentration. The mixture of the two metals in their chloride form resulted in the observation of additive and synergistic efects, which underlines the importance of considering the cocktail efect in ecotoxicological studies.

Comparative effects of trace metal elements released from dissolution of aluminum-based galvanic anodes, aluminum chloride, zinc chloride, and their mixture on the development of the Pacific oyster D-larvae, Crassostrea gigas - Levallois, Alexandre; Katherine Costil; Caplat, Christelle; Basuyaux, Olivier; Lebel, Jean-Marc; Guegan, Claire; Serpentini, Antoine (Environmental Science and Pollution Research, 2023)

Comparative Proteome Analysis of Four Stages of Spermatogenesis in the Small-Spotted Catshark (Scyliorhinus canicula) - Jeanne, Fabian; Bernay, Benoît; Pascal Sourdaine (Journal of Proteome Research, 2023)

Complex drivers of primary production along an anthropised estuary (Seine estuary—France) - Serre-Fredj, Léon; Chasselin, Léo; Jolly, Orianne; Pascal Claquin (Frontiers in Environmental Science, 2023)

Coral reef fish communities of natural habitats and man-made coastal structures in Bora-Bora (French Polynesia) - Gairin, Emma; Minier, Lana; Claverie, Thomas; Charlotte R. Dromard; Maueau, Tehani; Collin, Antoine; Frédérich, Bruno; Bertucci, Frédéric; Lecchini, David (Belgian Journal of Zoology, 2023)

Current knowledge of New Caledonian marine and freshwater ichthyofauna, SW Pacific Ocean: Diversity, exploitation, threats and management actions. - Yves Letourneur; Charpin Nicolas; Marion Mennesson; Philippe Keith (Cybium, 2023)

Data quality control considerations in multivariate environmental monitoring: experience of the French coastal network SOMLIT - Breton, Elsa; Savoye, Nicolas; Rimmelin-Maury, Peggy; Sautour, Benoit; Goberville, Eric; Lheureux, Arnaud; Cariou, Thierry; Ferreira, Sophie; Agogue, Helene; Alliouane, Samir; Aubert, Fabien; Aubin, Sébastien; et al. (Frontiers in Marine Science, 2023)

Decoupling carry-over effects from environment in fish nursery grounds - Teichert, Nils; Lizé, Anne; Cabral, Henrique; Acou, Anthony; Trancart, Thomas; Virag, Laure-Sarah; Feunteun, Eric; Alexandre Carpentier (Science of The Total Environment, 2023)
Life-history trait expression not only depends on the current environmental constraints, but also on the past ones that shaped traits expressed earlier in life. Such an effect, named carry-over, can occur in fish nursery grounds when juvenile performances after settlement are influenced by their larval traits in combination with conditions experienced in nurseries. To date, the impacts of environmental and human stressors on post-settlement traits have been assessed, but independently from larval traits, so that the contributions of environmental versus carry-over constraints remain unquantified. Here, we used a reconstructive approach based on otolith microstructure to investigate how carry-over and environment affect life-history traits of the European seabass, Dicentrarchus labrax. In the northeast Atlantic Ocean, seabass juveniles were collected in six French estuarine nursery areas with contrasted environmental conditions (water temperature, salinity, food availability, and anthropogenic impacts), and five of their life-history traits across ontogenetic stages were measured (pelagic growth, larval duration, size at settlement, post-settlement growth and body condition). Piecewise structural equation model emphasized the strong co-variation of larval traits in response to food availability and temperature in the pelagic environment, stressing that fast growing larvae are characterized by shorter pelagic larval duration, but larger size at recruitment. However, the magnitude of carry-over effects greatly varied between traits, revealing that larval trait impacts on post-settlement traits remained minor as compared to the nursery environment. In estuarine nurseries, our findings suggest that resource allocation results from a trade-off between somatic growth and energy storage. Fish juveniles exposed to anthropogenic stress or risk of food limitation tended to predominantly invest in storage, whereas individuals in favourable conditions allocated their resources in somatic growth. These findings highlight the importance of heterogeneity in pelagic and nursery environments in understanding trait variations and population dynamic of estuarine dependent fish.

Diet quality determines blue mussel physiological status: A long-term experimental multi-biomarker approach - Liénart, Camilla; Tedengren, Michael; Garbaras, Andrius; Lim, Hwanmi; Chynel, Mathias; Robinson, Christophe; Tarik Meziane; Karlson, Agnes M.L. (Journal of Experimental Marine Biology and Ecology, 2023)

Discovery of a Digenean (Cryptogonimidae) Living in a Cleft-Lipped Goby, Sicyopterus cynocephalus (Teleostei: Gobiidae) from Ranongga Island, Solomon Islands: Analysis of Multiple Ribosomal DNA Regions - Mathews, Patrick D.; Nicolas Rabet; L. Espinoza, Luis; Vincent Haÿ; Bonillo, Céline; Philippe Keith; Clara Lord; Audebert, Fabienne (Pathogens, 2023)

Duplicated paralog of sulfide: quinone oxidoreductase contributes to the adaptation to hydrogen sulfide-rich environment in the hydrothermal vent crab, Xenograpsus testudinatus - Chen, Chi; Wu, Guan-Chung; Chung, Yao-Tse; Li, Hau-Wen; Chou, Pei-Hsuan; Tseng, Yung-Che; Chen, Chieh-Jhen; Sylvie Dufour; Chang, Ching-Fong (Science of The Total Environment, 2023)

Dynamics of the Benthic Communities of Pigeon Islets (Guadeloupe Island, Lesser Antilles) from 2012 to 2021 Monitored by a Photo-Quadrats Technique - Malahel, Hanna-May; Freschet, Camille; Mège, Simone; Bouchon, Claude (Gulf and Caribbean Research, 2023)
Since 2012, the benthic communities of the Pigeon Islets (Guadeloupe Island, Lesser Antilles) have been monitored biannually by the National Park of Guadeloupe using photo—quadrats. This monitoring was carried out at 12 coral reef stations distributed around the islets. The data collected from 2012 to 2021 highlight the significant events that disrupted the coral communities of Guadeloupe. Among these remarkable phenomena, an episode of coral bleaching occurred in 2019, followed by the appearance of a new coral disease, Stony Coral Tissue Loss Disease (SCTLD), in 2020. As a result of these threats, a drop of 54% of coral cover was observed in the monitored sites, accompanied by a rise of 16% of the surface occupied by macroalgae. The protocol set up by the National Park of Guadeloupe was found to be efficient to follow the temporal dynamics of benthic reef communities.
Keywords: coral bleaching; Coral communities; coral disease; SCTLD; temporal dynamics

An ecosystem-wide approach for assessing the spatialized cumulative effects of local and global changes on coastal ecosystem functioningAbstract - Nogues, Quentin; Bourdaud, Pierre; Araignous, Emma; Halouani, Ghassen; Ben Rais Lasram, Frida; Dauvin, Jean-Claude; Le Loc'h, François; Nathalie Niquil (ICES Journal of Marine Science, 2023)

Efects on Growth of Juvenile Abalones Haliotis tuberculata Under Chronic Exposition to Metals Released from the Dissolution of an Aluminium‑Based Galvanic Anode - Nivelais, L; Levallois, A; Basuyaux, O; Costil, K; Lebel, J M; Larsonneur, S; Guichard, G; Serpentini, A.; Caplat, C (Archives of Environmental Contamination and Toxicology, 2023)
In the marine environment, the galvanic anode cathodic protection system (GACP) undergoes oxidation and releases metals in the forms of ions or oxy-hydroxides into the environment. The objective of the present study was to investigate the toxicity of a cocktail of metals released from the dissolution of an aluminium-based galvanic anode (~95% Al,~5% Zn) on the abalone Haliotis tuberculata. Juveniles were exposed for 16 weeks (i.e. 12 weeks of exposure and 4 weeks of decontamination phase) and their growth, intake rate, conversion rate and metallic concentrations were monitored. A total of 6 conditions were tested: a control, 4 concentrations based on Al and a trophic control. Results showed that the mortality reached 57% for individuals exposed to 1125 µg L−1 of Al, and the abalone growth signifcantly decreased for an Al concentration greater than 495 µg L−1. At the highest exposure concentration, intake rate measurements revealed that the appetite of abalones was afected, supported by the large increase in the conversion rate which was indicative of a poor feed efciency. The monitoring of metallic concentrations showed that H. tuberculata strongly bioconcentrated Al relative to zinc. The diet did not appear to be the primary pathway for metal entry. Concentrations that signifcantly impacted abalone growth and survival during the experiment were higher than those found in natural environment, but the bioconcentration of Al into the tissues of a primary consumer such as abalone may be a potential pathway for Al to enter food webs.

The effect of interspecific and intraspecific diversity on microplastic ingestion in two co-occurring mussel species in South Africa - Lorenzo Cozzolino; Nicastro, Katy R.; Sébastien Lefebvre; Luana Corona; Pierre William Froneman; Christopher D. McQuaid; Zardi, Gerardo I. (Marine Pollution Bulletin, 2023)

Effects of anthropogenic magnetic fields on the behavior of a major predator of the intertidal and subtidal zones, the velvet crab Necora puber - Albert, Luana; Olivier, Frédéric; Jolivet, Aurélie; Chauvaud, Laurent; Chauvaud, Sylvain (Marine Environmental Research, 2023)
With the progress of the offshore renewable energy sector and electrical interconnection projects, a substantial rise in the number of submarine power cables is expected soon. Such cables emit either alternating or direct current magnetic fields whose impact on marine invertebrates is currently unknown and hardly studied. In this context, this study aimed to assess potential short-term exposure (30 min) effects of both alternating and direct magnetic fields of increasing intensity (72–304 μT) on the behavior of the high-ecological value velvet crab (Necora puber). Three experiments were designed to evaluate whether the strongest magnetic field intensities induce crabs’ attraction or repulsion responses, and whether foraging and sheltering behaviors may be modified. We extracted from video analyses several variables as the time budgets crabs spent immobile, moving, feeding, or sheltering as well as total and maximal distance reached in the magnetic field (MF) gradient. The crabs exposed to artificial MF did not exhibit significant behavioral changes compared with those exposed to the “natural” MF. Overall, our results suggest that, at such intensities, artificial magnetic fields do not significantly alter behaviors of N. puber. Nevertheless, future studies should be conducted to examine the effects of longer exposure periods and to detect potential habituation or resilience processes.
Keywords: Behavior; Crustaceans; Magnetic fields; Magneto-sensitivity; Marine renewable energy devices; Submarine power cables

Effects of anthropogenic sounds on the behavior and physiology of the Eastern oyster (Crassostrea virginica) - Ledoux, Tamara; Clements, Jeff C.; Comeau, Luc A.; Cervello, Gauthier; Tremblay, Rejean; Olivier, Frédéric; Chauvaud, Laurent; Bernier, Renée Y.; Lamarre, Simon G. (Frontiers in Marine Science, 2023)
Introduction: Noise pollution is a major stressor in the marine environment; however, responses of economically and ecologically important invertebrates, such as oysters, are largely unknown. Methods: Under laboratory conditions, we measured acute behavioral and physiological responses of eastern oysters (Crassostrea virginica) to sound treatments mimicking human activity in the environment. Results: Oysters immediately reduced their valve gape under simulated pile driving sound, but not drilling or boating sound. Pile-driving sound also reduced adductor muscle glycogen, but not triglyceride. None of the sound treatments affected longer-term (12 hours) valve activity levels after the administration of sounds. Interestingly, neither acute nor longer-term valve gaping responses were correlated with glycogen content on the individual level, suggesting that the observed behavioral responses to sound were not mechanistically driven by energetic physiology. Discussion: Our results suggest that C. virginica responds to some, but not all, anthropogenic sounds. Future studies assessing downstream effects on growth, reproduction, and survival in the wild are needed to better understand the effects of anthropogenic sounds on oyster populations and the biological communities they support.
Keywords: animal behavior; coastal ecosystem; energetic physiology; environmental stressors; global change biology; noise pollution

Effects on Growth of Juvenile Abalones Haliotis tuberculata Under Chronic Exposition to Metals Released from the Dissolution of an Aluminium-Based Galvanic Anode - Nivelais, Laureen; Levallois, Alexandre; Basuyaux, Olivier; Katherine Costil; Lebel, Jean-Marc; Larsonneur, Solveig; Guichard, Gwendoline; Serpentini, Antoine; Caplat, Christelle (Archives of Environmental Contamination and Toxicology, 2023)
In the marine environment, the galvanic anode cathodic protection system (GACP) undergoes oxidation and releases metals in the forms of ions or oxy-hydroxides into the environment. The objective of the present study was to investigate the toxicity of a cocktail of metals released from the dissolution of an aluminium-based galvanic anode (~95% Al,~5% Zn) on the abalone Haliotis tuberculata. Juveniles were exposed for 16 weeks (i.e. 12 weeks of exposure and 4 weeks of decontamination phase) and their growth, intake rate, conversion rate and metallic concentrations were monitored. A total of 6 conditions were tested: a control, 4 concentrations based on Al and a trophic control. Results showed that the mortality reached 57% for individuals exposed to 1125 µg L−1 of Al, and the abalone growth signifcantly decreased for an Al concentration greater than 495 µg L−1. At the highest exposure concentration, intake rate measurements revealed that the appetite of abalones was afected, supported by the large increase in the conversion rate which was indicative of a poor feed efciency. The monitoring of metallic concentrations showed that H. tuberculata strongly bioconcentrated Al relative to zinc. The diet did not appear to be the primary pathway for metal entry. Concentrations that signifcantly impacted abalone growth and survival during the experiment were higher than those found in natural environment, but the bioconcentration of Al into the tissues of a primary consumer such as abalone may be a potential pathway for Al to enter food webs.

El Observatorio permanente del Lago Titicaca (OLT) – Investigación y monitoreo de la eutrofización del Lago Menor con estaciones limnológicas, boya HydroMet y teledetección satelital. - Xavier Lazzaro; Viviana Edith Cruz Hernández; Marcela Andrea Ormachea Rojas; William Gustavo Lanza Aguilar; Javier Alberto Maldonado Alfaro; Javier Núñez Villalba (IRD/BOREA, UMSA/IE & UMSA/IIGEO., 2023)

Euendolithic Infestation of Mussel Shells Indirectly Improves the Thermal Buffering Offered by Mussel Beds to Associated Molluscs, but One Size Does Not Fit All - Dievart, Alexia M.; Christopher D. McQuaid; Zardi, Gerardo I.; Nicastro, Katy R.; Pierre William Froneman (Diversity, 2023)

Evidence of backcross inviability and mitochondrial DNA paternal leakage in sea turtle hybrids - Vilaça, Sibelle T.; Maroso, Francesco; Lara, Paulo; de Thoisy, Benoît; Chevallier, Damien; Arantes, Larissa Souza; Santos, Fabricio R.; Bertorelle, Giorgio; Mazzoni, Camila J. (Molecular Ecology, 2023)
Hybridization is known to be part of many species' evolutionary history. Sea turtles have a fascinating hybridization system in which species separated by as much as 43 million years are still capable of hybridizing. Indeed, the largest nesting populations in Brazil of loggerheads (Caretta caretta) and hawksbills (Eretmochelys imbricata) have a high incidence of hybrids between these two species. A third species, olive ridleys (Lepidochelys olivacea), is also known to hybridize although at a smaller scale. Here, we used restriction site-associated DNA sequencing (RAD-Seq) markers, mitogenomes, and satellite-telemetry to investigate the patterns of hybridization and introgression in the Brazilian sea turtle population and their relationship with the migratory behaviours between feeding and nesting aggregations. We also explicitly test if the mixing of two divergent genomes in sea turtle hybrids causes mitochondrial paternal leakage. We developed a new species-specific PCR-assay capable of detecting mitochondrial DNA (mtDNA) inheritance from both parental species and performed ultra-deep sequencing to estimate the abundance of each mtDNA type. Our results show that all adult hybrids are first generation (F1) and most display a loggerhead migratory behaviour. We detected paternal leakage in F1 hybrids and different proportions of mitochondria from maternal and paternal species. Although previous studies showed no significant fitness decrease in hatchlings, our results support genetically-related hybrid breakdown possibly caused by cytonuclear incompatibility. Further research on hybrids from other populations in addition to Brazil and between different species will show if backcross inviability and mitochondrial paternal leakage is observed across sea turtle species.
Keywords: Brazil; ddRAD; hybridization; introgression; Marine turtles; mitogenomes

Feeding ecology of two deep-sea skates bycaught on demersal longlines off Kerguelen Islands, Southern Indian Ocean - Faure, Johanna; Nicolas Gasco; Céline Bonillo; Munaron, Jean-Marie; Cherel, Yves; Clara Péron (Deep Sea Research Part I: Oceanographic Research Papers, 2023)

First isolation of Francisella halioticida strains from blue mussel (Mytilus edulis) in Normandy, France - Bouras, Hélène; Quesnelle, Yann; Barozet, Alix; Goux, Didier; Blin, Jean-Louis; Savary, Manuel; Céline Zatylny-Gaudin; Maryline Houssin (Journal of Invertebrate Pathology, 2023)

Global assessment of marine plastic exposure risk for oceanic birds - Clark, Bethany L.; Carneiro, Ana P.B.; Pearmain, Elisabeth J.; Rouyer, Marie-Morgane; ...; Clara Péron; al. (Nature Communications, 2023)
Plastic pollution is distributed patchily around the world’s oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting research and mitigation. Oceanic seabirds, particularly petrels, frequently ingest plastic, are highly threatened, and cover vast distances during foraging and migration. However, the spatial overlap between petrels and plastics is poorly understood. Here we combine marine plastic density estimates with individual movement data for 7137 birds of 77 petrel species to estimate relative exposure risk. We identify high exposure risk areas in the Mediterranean and Black seas, and the northeast Pacific, northwest Pacific, South Atlantic and southwest Indian oceans. Plastic exposure risk varies greatly among species and populations, and between breeding and non-breeding seasons. Exposure risk is disproportionately high for Threatened species. Outside the Mediterranean and Black seas, exposure risk is highest in the high seas and Exclusive Economic Zones (EEZs) of the USA, Japan, and the UK. Birds generally had higher plastic exposure risk outside the EEZ of the country where they breed. We identify conservation and research priorities, and highlight that international collaboration is key to addressing the impacts of marine plastic on wide-ranging species.

The goby fish Sicydium spp. as valuable sentinel species towards the chemical stress in freshwater bodies of West Indies - Bony, S.; Labeille, M.; Lefrancois, E.; Noury, P.; Olivier, J.M.; Santos, R.; Teichert, Nils; Besnard, A.; Devaux, A. (Aquatic Toxicology, 2023)
Implementation of the European Water Framework Directive in tropical areas such as the French West Indies (FWI) requires to select relevant aquatic sentinel species for investigating the ecological status of surface waters. The present work aimed to study the biological response of the widespread fish Sicydium spp. towards river chemical quality in Guadeloupe island through a set of proper biomarkers. During a 2-year survey, the hepatic EROD activity, the micronucleus formation and the level of primary DNA strand breaks in erythrocytes were measured respectively as an enzymatic biomarker of exposure and genotoxicity endpoints in fish living upstream and downstream of two chemically-contrasted rivers. Hepatic EROD activity was shown to be variable along the time but always significantly higher in fish from the most contaminated river (Rivière aux Herbes) compared to the low contaminated one (Grande Rivière de Vieux-Habitants). Fish size did not influence EROD activity. Female fish exhibited a lower EROD activity compared to males depending on the catching period. We observed significant temporal variation in micronucleus frequency and primary DNA damage level measured in fish erythrocytes that did not depend on the fish size. Micronucleus frequency and to a lesser extent DNA damage were significantly higher in fish from the Rivière aux Herbes compared to the Grande Rivière de Vieux-Habitants. Our results argue for the interest of using Sicydium spp. as sentinel species to assess river quality and chemical pressures in FWI.

How ocean warming and acidification affect the life cycle of six worldwide commercialised sea urchin species: A review - Uboldi, Thomas; Olivier, Frédéric; Chauvaud, Laurent; Tremblay, Rejean (Aquaculture, Fish and Fisheries, 2023)
Ongoing global changes are expected to affect the worldwide production of many fisheries and aquaculture systems. Because invertebrates represent a relevant industry, it is crucial to anticipate challenges that are resulting from the current environmental alterations. In this review, we rely on the estimated physiological limits of six commercialised species of sea urchins (Loxechinus albus, Mesocentrotus franciscanus, Paracentrotus lividus, Strongylocentrotus droebachiensis, Strongylocentrotus  intermedius and Strongylocentrotus purpuratus) to define the vulnerability (or resilience) of their populations facing ocean warming and acidification (OW&A). Considering that coastal systems do not change uniformly and that the populations’ response to stressors varies depending on their origin, we investigate the effects of OW&A by including studies that estimate future environmental mutations within their distribution areas. Crossreferencing 79 studies, we find that several sea urchin populations are potentially vulnerable to the predicted OW&A as environmental conditions in certain regions are expected to shift beyond their estimated physiological limit of tolerance. Specifically, while upper thermal thresholds seem to be respected for L. albus along the SW American coast, M. franciscanus and S. purpuratus southern populations appear to be vulnerable in NW America. Moreover, as a result of the strong warming expected in the Arctic and sub-Arctic regions, the local productivity of S. droebachiensis is also potentially largely affected. Finally, populations of S. intermedius and P. lividus found in northern Japan and eastern Mediterranean respectively, are supposed to decline due to large environmental changes brought about by OW&A. This review highlights the status and the potential of local adaptation of a number of sea urchin populations in response to changing environmental conditions, revealing possible future challenges for various local fishing industries.
Keywords: Aquaculture; ecophysiology; fishery; Ocean acidification; ocean warming; sea urchin

Identification of microbial exopolymer producers in sandy and muddy intertidal sediments by compound-specific isotope analysis - Cédric Hubas; Gaubert-Boussarie, Julie; D’Hondt, An-Sofie; Bruno Jesus; Lamy, Dominique; Meleder, Vona; Prins, Antoine; Rosa, Philippe; Stock, Willem; Sabbe, Koen (Peer Community Journal, 2023)
Extracellular polymeric substances (EPS) refer to a wide variety of high molecular weight molecules secreted outside the cell membrane by biofilm microorganisms. In the present study, EPS from marine microphytobenthic biofilms were extracted and their isotope ratios were analysed. A comparison of these ratios with the carbon isotope ratios of fatty acid biomarkers allowed the identification of the main EPS producers of two contrasting types of intertidal marine sediments. Our study reveals that EPS sources are more diverse in sandy sediments than in muddy sediments. We also found distinct patterns in the production and breakdown of EPS in sandy and muddy environments. The main difference observed was in how epipelic and epipsammic diatoms affected the chemistry of EPS, which had significant implications for the growth of bacteria specialized in utilizing EPS. These differences were likely linked to variations in the functioning of epipelic and epipsammic communities, specifically in how EPS was used either for motility or for cell attachment.

Identifying global research and conservation priorities for Columbidae: a quantitative approach using random forest models - Cambrone, Christopher; Jean-Pierre, Aurélie; Bezault, Etienne; Cézilly, Frank (Frontiers in Ecology and Evolution, 2023)
The family of Columbidae, including pigeons and doves, remains understudied despite their patrimonial value and high ecological and conservation relevance. Currently, 353 extant columbid species are listed in the IUCN red list, with about 20% of them being threatened with extinction. However, there has been little effort so far to synthetize the available information on factors influencing extinction risk and the allocation of research effort among columbid species. In this context, using random forest models, the present study aims at quantitatively assessing to what extent environmental, life history and socio-political factors may drive the extinction risk of pigeons and doves and explain differences in scientific attention among species. We found that high risk of extinction in columbids is associated with small historical range, exposure to invasive alien mammals and living in isolated islands and/or at low altitudes, while the probability of population decline is associated with species body size, surrounding human density and narrow habitat breadth. We also evidenced a large disparity between species or population extinction risk and scientific interest. Indeed, most of the studies on columbids have been conducted by scientists from North America and Western Europe on their local species, whereas species from biodiversity hotspots, which are more at risk of extinction, have comparatively received little attention. This unequal acquisition of knowledge creates gaps that deserve to be filled in order to have a good appreciation of extinction risk in columbids and associated threats, through fair transnational cooperation, academic training and regional coordination in conservation-oriented research on columbids.

Impact assessment of metals realeased by aluminium-based galvanic anode on the physiology of the abalone Haliotis tuberculata in controlled conditions - Alexandre Levallois; Nivelais, Laureen; Christelle Caplat; Jean-Marc Lebel; Basuyaux, Olivier; Katherine Costil; Antoine Serpentini (Ecotoxicology, 2023)
To protect metal structures immersed in the sea from corrosion, the galvanic anode cathodic protection system (GACP) is often applied. However, this association leads to continuous oxidation of the galvanic anode and therefore to a release of a metal cocktail in the forms of ions or oxy-hydroxides. Therefore, the main objective of our study was to investigate the toxicity of elements released from the dissolution of an aluminium-based galvanic anode (∼95% Al, ∼5% Zn, <0.1% for In, Cu, Cd, Mn, Fe) on a grazing gastropod, the abalone Haliotis tuberculata. The present study was carried out in complement to other research currently in submission. Gastropods were exposed for 16 weeks (12 weeks of exposure and 4 weeks of decontamination phase) to 6 conditions including a control, 4 concentrations based on total aluminium level (86, 425, 1096 and 3549 µg L−1 ) and a trophic control, corresponding to abalones placed in non-contaminated natural seawater but fed with contaminated algae. The effects of metals on growth, glycogen levels, brix index of hemolymph, MDA levels in digestive gland and gills, hemocyte phagocytic activity, ROS production, lysosomal system and the progress of gametogenesis were investigated throughout the entire exposure allowing the realization of kinetics. The results revealed that the aluminiumbased anode does not seem to have an effect on the health status of the individuals for environmentally realistic concentrations. However, in extreme conditions strong effects were reported on the growth, immune system and reproduction of abalone.

Impact of anthropogenic sounds (pile driving, drilling and vessels) on the development of model species involved in marine biofoulingTable_1.docx - Cervello, Gauthier; Olivier, Frédéric; Chauvaud, Laurent; Winkler, Gesche; Mathias, Delphine; Juanes, Francis; Tremblay, Rejean (Frontiers in Marine Science, 2023)
The uncontrolled colonization of benthic organisms on submerged surfaces, also called biofouling, causes severe damage in the shipping and aquaculture industries. Biofouling starts with a benthic biofilm composed of a complex assemblage of microbes, bacteria and benthic diatoms, calledmicrofouling, on whichmacrofouling invertebrate species settle and grow. Invertebrate larvae may use natural soundscapes to orientate inshore and choose their optimal habitat. Recent studies have demonstrated that ship sounds enhance the larval settlement and growth of several invertebrate species, such as mussels, associated with biofouling. Among invertebrates, effects of sound generated by offshore human activities are still poorly studied. This study aims to assess the effect of pile driving, drilling and vessel sounds on model species associated with micro and macrofouling. First, the biofilm development of Navicula pelliculosa and Amphora coffeaeformis was assessed, then, the larval development of the blue mussel (Mytilus edulis) was evaluated from the D-veliger to the postlarval stage. Mussel larvae and microalgae were exposed 12 h each day in tanks (Larvosonic) adapted to sound experiments under controlled conditions. All anthropogenic sounds induced a thinner N. pelliculosa biofilm coupled with a lower microalgae concentration. The drilling sound had a stronger effect on the biofilm thickness. The drilling sound significantly reduced the pediveliger settlement and the postlarvae clearance rate by 70.4% and tended to diminish settler sizes compared to control sound. Contrary to our expectation, pile driving tended to enhance larval recruitment by 22% (P=0.077) and the boat sound did not stimulate larval settlements or recruitment. Drilling sound generated a stressful acoustic environment for pediveliger settlements and postlarvae seem to maintain their shell valves closed to preserve energy. We identify potential causes andmechanisms involved in these impacts of anthropophony on larval ecology and microfouling dynamics.
Keywords: anthropogenic sounds; Benthic diatoms; Bioacoustics; Biofouling; larval development; settlement

Impact of vessel noise on feeding behavior and growth of zooplanktonic species - Aspirault, Ariane; Winkler, Gesche; Jolivet, Aurélie; Audet, Céline; Chauvaud, Laurent; Juanes, Francis; Olivier, Frédéric; Tremblay, Rejean (Frontiers in Marine Science, 2023)
Anthropogenic noise is a pervasive feature of the coastal ocean soundscape and is intensifying as vessel traffic activity increases. Low-frequency sounds from wave action on coastal reefs or anthropogenic noise have been shown to initiate larval settlement of marine invertebrates and accelerate metamorphosis to juvenile stages. These results suggest that some planktonic species can perceive and be impacted by anthropogenic sound. Hence, we tested the hypothesis that vessel noise has an impact on the feeding behavior of blue mussel (Mytilus edulis) veligers and of the copepod Eurytemora herdmani as well as on the growth of the rotifer Brachionus plicatilis. The results show that microalgae and feeding behavior of early life stages of mussels and copepods are not influenced by the presence of vessel noise. The growth of the rotifers was similar between the two sound treatments, but rotifers’ egg production in the absence of vessel noise was higher and eggs were also larger. Our results suggest that the effects of noise on plankton are complex; much more work is needed to unravel these often subtle effects.
Keywords: bioacoustic; clearance rate; Growth; vessel noise emission; Zooplankton

Influence of nutrient enrichment on colonisation and photosynthetic parameters of hard substrate marine microphytobenthos - Vivier, Baptiste; Faucheux-Bourlot, Caroline; Orvain, Francis; Chasselin, Léo; Jolly, Orianne; Navon, Maxime; Boutouil, Mohamed; Goux, Didier; Dauvin, Jean-Claude; Pascal Claquin (Biofouling, 2023)
This study aimed to assess the influence of nutrient enrichment on the development of microalgal biofilm on concrete and PVC cubes. Three mesocosms were utilized to create a nutrient gradient over a period of 28 days. Various parameters including biomass, photosynthetic activity, microtopography, and extracellular polymeric substances (EPS) were measured. Imaging PAM techniques were employed to obtain surface-wide data. Results revealed that nutrient availability had no significant impact on Chl a biomass and the maximum quantum efficiency of PSII (Fv/Fm). The photosynthetic capacity and efficiency were minimally affected by nutrient availability. Interestingly, the relationship between microphytobenthic (MPB) biomass and photosynthesis and surface rugosity exhibited distinct patterns. Negative reliefs showed a strong correlation with Fv/Fm, while no clear pattern emerged for biomass on rough concrete structures. Overall, our findings demonstrate that under conditions of heightened eutrophication, biofilm photosynthesis thrives in the fissures and crevasses of colonized structures regardless of nutrient levels. This investigation provides valuable insights into the interplay between nutrient availability and surface rugosity.

Influence of Nutrient Gradient on Phytoplankton Size Structure, Primary Production and Carbon Transfer Pathway in a Highly Productive Area (SE Mediterranean) - Chkili Oumayma; Meddeb Marouan; Mejri Kousri Kaouther; Melliti Ben Garali Sondes; Makhlouf Belkhahia Nouha; Tedetti Marc; Pagano Marc; Belaaj Zouari Amel; Belhassen Malika; Niquil Nathalie; Sakka Hlaili Asma (Ocean Science Journal, 2023)
We assessed the spatial variability in the size structure of phytoplankton, community composition, primary production and carbon fluxes through the planktonic food web of the Gulf of Gabès (GG; Southeastern Mediterranean Sea) in the fall of 2017 during the MERMEX-MERITE cruise. High concentrations in nutrients, chlorophyll a (~ 2–6 μg L −1 ) and primary production (1816–3674 mg C m −2 d −1 ) revealed an eutrophic status of the studied stations in the GG. In accordance with hydrodynamic features, inorganic nutrients showed increases in concentrations from North to South and from coast to off- shore, these nutrient gradients impacting the spatial distribution of phytoplankton community. Size-fractioned phytoplankton biomass and production were the lowest in the northernmost zone where they were mainly sustained by pico-sized fraction. Concomitantly, in this area, small aloricate ciliates were dominant leading to a high microbivory. Conversely, higher biomass and production were measured towards the South and offshore with prevalence of larger phytoplankton (nano- and/or micro- sized fractions) supported by diatoms. The herbivorous protozooplankton and metazooplankton were more abundant in these zones, resulting in an increase of the herbivory. The vertical particulate organic carbon flux followed also a north–south and coast-offshore increasing gradient, with a higher contribution of phytoplankton, and zooplankton fecal pellets to the sink- ing organic matter in the southernmost area. Our results suggest that even in nutrient-rich and highly productive waters, a continuum of trophic pathways, ranging from microbial to multivorous and herbivorous food webs, may exist, which implies different efficiencies in carbon export and carrying capacity within the ecosystem.
Keywords: Phytoplankton size-structure · Primary production · Zooplankton grazing · Planktonic food web · Mediterranean gulf

An integrated conceptual model to characterize the effects of offshore wind farms on ecosystem services - Baulaz, Yoann; Mouchet, Maud; Nathalie Niquil; Ben Rais Lasram, Frida (Ecosystem Services, 2023)

Isotopic niches of diadromous fishes inform on interspecific competition in an obstructed catchment - Lizé, Anne; Teichert, Nils; Roussel, Jean-Marc; Acou, Anthony; Feunteun, Eric; Carpentier, Alexandre (Frontiers in Ecology and Evolution, 2023)
Competition arises when species share a limited resource, but this can be avoided through niche partitioning. Despite the large body of literature on diadromous fishes, very few studies have focused on niche partitioning when competing for resources. Diadromous fishes are suffering a global decline throughout their range in part due to their peculiar life history traits as they migrate from the sea to freshwater to spawn or the reverse. They are particularly sensitive to river fragmentation induced by barriers. Dams for instance are expected to alter the spatial distribution and resource exploitation of diadromous fishes as well as other organisms. Here, we studied the ecological niche of six taxa of diadromous fishes, temporally co-occurring in the same land–sea continuum obstructed by two river dams. We used Bayesian mixing models run on C and N isotopes to infer the various habitats used and the origin of the trophic carbon in muscle and scale tissues of diadromous fishes. Results showed that the sub-adults of Anguilla anguilla, juveniles of Petromyzon marinus, and Salmo trutta exploit mainly the freshwater, or marine part for adults of Lampetra fluviatilis, whereas juveniles of Platichthys flesus and Mugilidae use all the habitats of the land–sea continuum. In the freshwater habitat, the microphytobenthos and biofilm are the main sources of carbon used, while in the marine habitat, the basal carbon sources are more diverse. The analyses of niche overlaps between diadromous fishes demonstrate that the widest isotopic niches, observed for A. anguilla and P. flesus, also have more impact within the community. Results are discussed in terms of intra- and interspecific competition between these diadromous fishes and their generalist/specialist strategies in an obstructed catchment.

Key issues in assessing threats to sea turtles: knowledge gaps and future directions - Fuentes, MMPB; McMichael, E; Kot, CY; Silver-Gorges, I; Wallace, BP; Godley, BJ; Brooks, AML; Ceriani, SA; Cortés-Gómez, AA; Dawson, TM; Dodge, KL; Flint, M; et al. (Endangered Species Research, 2023)

Local Food Systems under Global Influence: The Case of Food, Health and Environment in Five Socio-Ecosystems - Rapinski, Michael; Raymond, Richard; Davy, Damien; Herrmann, Thora; Bedell, Jean-Philippe; Ka, Abdou; Odonne, Guillaume; Chanteloup, Laine; Pascal Jean Lopez; Foulquier, Eric; da Silva, Eduardo Ferreira; El Deghel, Nathalie; et al. (Sustainability, 2023)

Local scale high frequency monitoring of seaweed strandings along an intertidal shore of the English Channel (Luc-sur-Mer, Normandy France) – Effect of biotic and abiotic factors - Stéphanie Lemesle; Anne-Marie Rusig; Isabelle Mussio (Aquatic Botany, 2023)

m6A Profile Dynamics Indicates Regulation of Oyster Development by m6A-RNA Epitranscriptomes - Le Franc, Lorane; Petton, Bruno; Favrel, Pascal; Guillaume Rivière (Genomics, Proteomics & Bioinformatics, 2023)

Major declines in NE Atlantic plankton contrast with more stable populations in the rapidly warming North Sea - Holland, Matthew M.; Louchart, Arnaud; Artigas, Luis Felipe; Ostle, Clare; Atkinson, Angus; Rombouts, Isabelle; Graves, Carolyn A.; Devlin, Michelle; Heyden, Birgit; Machairopoulou, Margarita; Bresnan, Eileen; Schilder, Jos; et al. (Science of The Total Environment, 2023)
Plankton form the base of marine food webs, making them important indicators of ecosystem status. Changes in the abundance of plankton functional groups, or lifeforms, can affect higher trophic levels and can indicate important shifts in ecosystem functioning. Here, we extend this knowledge by combining data from Continuous Plankton Recorder and fixed-point stations to provide the most comprehensive analysis of plankton time-series for the North-East Atlantic and North-West European shelf to date. We analysed 24 phytoplankton and zooplankton datasets from 15 research institutions to map 60-year abundance trends for 8 planktonic lifeforms. Most lifeforms decreased in abundance (e.g. dinoflagellates: −5 %, holoplankton: −7 % decade−1), except for meroplankton, which increased 12 % decade−1, reflecting widespread changes in large-scale and localised processes. K-means clustering of assessment units according to abundance trends revealed largely opposing trend direction between shelf and oceanic regions for most lifeforms, with North Sea areas characterised by increasing coastal abundance, while abundance decreased in North-East Atlantic areas. Individual taxa comprising each phytoplankton lifeform exhibited similar abundance trends, whereas taxa grouped within zooplankton lifeforms were more variable. These regional contrasts are counterintuitive, since the North Sea which has undergone major warming, changes in nutrients, and past fisheries perturbation has changed far less, from phytoplankton to fish larvae, as compared to the more slowly warming North-East Atlantic with lower nutrient supply and fishing pressure. This more remote oceanic region has shown a major and worrying decline in the traditional food web. Although the causal mechanisms remain unclear, declining abundance of key planktonic lifeforms in the North-East Atlantic, including diatoms and copepods, are a cause of major concern for the future of food webs and should provide a red flag to politicians and policymakers about the prioritisation of future management and adaptation measures required to ensure future sustainable use of the marine ecosystem.

Marine invertebrates and noise - Solé, Marta; Kaifu, Kenzo; Mooney, T. Aran; Nedelec, Sophie L.; Olivier, Frédéric; Radford, Andrew N.; Vazzana, Mirella; Wale, Matthew A.; Semmens, Jayson M.; Simpson, Stephen D.; Buscaino, Giuseppa; Hawkins, Anthony; et al. (Frontiers in Marine Science, 2023)
Within the set of risk factors that compromise the conservation of marine biodiversity, one of the least understood concerns is the noise produced by human operations at sea and from land. Many aspects of how noise and other forms of energy may impact the natural balance of the oceans are still unstudied. Substantial attention has been devoted in the last decades to determine the sensitivity to noise of marine mammals—especially cetaceans and pinnipeds— and fish because they are known to possess hearing organs. Recent studies have revealed that a wide diversity of invertebrates are also sensitive to sounds, especially via sensory organs whose original function is to allow maintaining equilibrium in the water column and to sense gravity. Marine invertebrates not only represent the largest proportion of marine biomass and are indicators of ocean health but many species also have important socio-economic values. This review presents the current scientific knowledge on invertebrate bioacoustics (sound production, reception, sensitivity), as well as on how marine invertebrates are affected by anthropogenic noises. It also critically revisits the literature to identify gaps that will frame future research investigating the tolerance to noise of marine ecosystems.
Keywords: marine invertebrates; marine noise pollution; noise effects; particle motion; sound detection; sound pressure; sound production; statocyst

Marine pollution between gyres: plastic debris in marine turtles and dolphins in French Guiana, Equatorial Atlantic - Flore Emmonot; Blandine Siegrist; Amandine Bordin; Virginie Dos Reis; Chevallier, Damien; Yannick Estevez; Benoit de Thoisy (Latin American Journal of Aquatic Research, 2023)
Plastic pollution has not raised much attention until the 2000s, despite being manufactured for about a century. It is now considered one of the most substantial environmental issues. Here we investigate the presence of plastic contamination in 34 stranded animals on the coast of French Guiana, South America. Here we present information highlighting the magnitude of plastic contamination in marine coastal and pelagic tropical marine vertebrates on the Equatorial Atlantic coast of South America. All four species studied here are protected and emblematic vertebrates of the region, with a fragile conservation status, including the olive ridley turtle Lepidochelys olivacea, the green turtle Chelonia mydas and the leatherback turtle Dermochelys coriacea, and a small cetacean, the Guiana dolphin Sotalia guianensis. Macroplastics (polypropylene, polyethylene, terephthalate, and polystyrene) were detected in four juvenile green turtles. Microplastics (polypropylene, polyethylene, terephthalate, polystyrene, nylon, acrylates, polycarbonates) were found in 13 individuals (two dolphins, six olive ridleys, four green turtles, and the leatherback turtle). The sampled species have different diets, distribution patterns, and ages, suggesting widespread plastic pollution. The study area is located far from the oceanic gyres. However, they are influenced by the North Brazilian Current, the Amazon River, and other rivers of the Guianas.
Keywords: Chelonia; Dermochelys; Lepidochelys; macroplastics; microplastics; Sotalia

Molecular and phenotypic effects of early exposure to an environmentally relevant pesticide mixture in the Pacific oyster, Crassostrea gigas. - Sol-Dourdin, Thomas; Guillaume Rivière; Cormier, Alexandre; Di Poi, Carole; Guyomard, Killian; Rabiller, Manuella; Akcha, Farida; Bah Sadialiou, Thierno; Le Monier, Pauline; Sussarellu, Rossana (Environmental Pollution, 2023)

Molecular ecology of the freshwater shrimp Caridina natalensis and comparative analysis with other amphidromous species (Decapoda, Teleostei, and Gastropoda) - de Mazancourt, Valentin; Ahmed Abdou; Castelin, Magalie; Ellien, Céline; Clara Lord; Marion Mennesson; Renneville, Clémentine; Marquet, Gérard; Philippe Keith (Hydrobiologia, 2023)
Due to their life cycle shared between rivers and oceans, amphidromous organisms serve as intriguing models for studying biogeography. To investigate the implications of their unique life history, we examined the population structure of the amphidromous shrimp Caridina natalensis across its known range in the South Western Indian Ocean. A total of 118 specimens were collected from 7 islands (Mayotte, Mohéli, Mahé, Praslin, Silhouette, Mauritius and Madagascar) and the African mainland (South Africa), and their 16S rRNA and Cox1 mitochondrial genes were sequenced. Our findings reveal significant regional structure among archipelagos, suggesting complex patterns of dispersal involving successive events of extinction-recolonization. By conducting a comparative analysis with six other amphidromous species from the South Western Indian Ocean, based on literature sources, we were able to draw conclusions regarding the amphidromous biogeography of the area. Furthermore, we propose a novel classification of amphidromous species, considering their population structure and life history traits. We defined four categories of increasing dispersal abilities and decreasing genetic population structure: 1. Land-locked species; 2. Species with reduced or facultative amphidromy; 3. Species with common amphidromy; and 4. Super-amphidromous species. Lastly, we identified the Comoros Islands (namely Mayotte and Mohéli) as a critical area for the dispersal of amphidromous species, emphasizing the need for prioritizing conservation efforts in this region.

Nanopore long-reads reveal fine structure of prokaryotic communities in mangrove sediments, like Illumina short-reads but with twice more taxa - Alice Lemoinne; Guillaume Dirberg; Myriam Georges; Tony Robinet (bioRxiv, 2023)

The Neglected Role of Intraspecific Variation in Plastic Pollution Research - Nicastro, Katy R.; Seuront, Laurent; Lorenzo Cozzolino; Zardi, Gerardo I. (Anthropocene Science, 2023)

New insights into the diversity of cryptobenthic Cirripectes blennies in the Mascarene Archipelago sampled using Autonomous Reef Monitoring Structures (ARMS) - Marion Couëdel; Dettai, Agnès; Mireille M.M. Guillaume; Bruggemann, Fleur; Bureau, Sophie; Baptiste Frattini; Verde Ferreira, Amélie; Azie, Jean‐Lindsay; Bruggemann, J. Henrich (Ecology and Evolution, 2023)

New species of Pavlovophyceae (Haptophyta) and revision of the genera Exanthemachrysis, Rebecca and Pavlova - Benoît Véron; Rougier, Etienne; Taylor, Anthony; Goux, Didier (European Journal of Taxonomy, 2023)
The justification of the 4 genera that currently compose the class Pavlovophyceae is based on a low number of species and a relative paucity of available, traceable and referenced cultures. Previous integrative phylogeny work revealed strains that can refine and strengthen our knowledge of the genera in the class. The application of multiple light and electron microscopy techniques allowed us to prioritize the cytomorphological characters (pyrenoid, thylakoid, stigma, knob-scales, life stage / life cycle) used for the taxonomy of these algae and to describe two new species: Exanthemachrysis fresneliae Véron sp. nov. and Rebecca billardiae Véron sp. nov. Consequently, revisions of the two genera Exanthemachrysis Lepailleur emend. Véron and Rebecca Green emend. Véron were made. In addition, the genus Pavlova Butcher emend Véron is revised in the light of these characters. Particular emphasis is placed on the life stages and habitat of the species.
Keywords: habitats; Haptophytes; New species; Phytoplankton; pyrenoid.

Note technique : Estimation de l'abondance du zooplancton gélatineux à partir de traits de chaluts - Lheureux, Arnaud; Vaz, Sandrine; Antajan, Elvire; Vincent, Dorothée; Lombard, Fabien; Goberville, Eric; Sacchi, Jacques; Morandeau, Fabien (2023)
Keywords: campagnes optimisées DCSMM; chalut; zooplancton gélatineux

Physiological condition of the warty venus (Venus verrucosa L. 1758) larvae modulates response to pile driving and drilling underwater sounds - Gigot, Mathilde; Tremblay, Rejean; Bonnel, Julien; Chauvaud, Laurent; Olivier, Frédéric (Frontiers in Marine Science, 2023)
Noise is now recognized as a new form of pollution in marine coastal habitats. The development of marine renewable energies has introduced new sonorous perturbations, as the wind farm installation requires pile driving and drilling operations producing low frequency sounds at high sound pressure levels. Exponential expansion of offshore wind farms is occurring worldwide, making impact studies, particularly on benthic species highly abundant and diverse in the coastal area used for wind farming, a necessity. As larval recruitment is the basis for establishing a population, we conducted an experimental study to assess the interactive effects of pile driving or drilling sounds and larval rearing temperature on the endobenthic bivalve Venus verrucosa. In ectothermic animals, temperature modifies the organism’s physiology, resulting in performance variability. We hypothesize that temperature modulation could change larval responses to noise and explore the potential interacting effects of temperature and noise. Using two distinct rearing temperatures, physiologically different batches of larvae were produced with contrasting fatty acid content and composition in the neutral and polar lipid fractions. Without defining any absolute audition threshold for the larvae, we demonstrate that the effects of temperature and noise were ontogenic-dependent and modulated larval performance at the peri-metamorphic stage, acting on the metamorphosis dynamic. At the pediveligers stage, a strong interaction between both factors indicated that the response to noise was highly related to the physiological condition of the larvae. Finally, we suggest that underwater noise reduces the compensatory mechanisms established to balance the temperature increase.
Keywords: Anthropophony; energetic metabolism; fatty acids; larval recruitment; Metamorphosis trigger

Physiological conditions favorable to domoic acid production by three Pseudo-nitzschia species - Aurore Sauvey; Pascal Claquin; Le Roy, Bertrand; Jolly, Orianne; Juliette Fauchot (Journal of Experimental Marine Biology and Ecology, 2023)

Pile driving and drilling underwater sounds impact the metamorphosis dynamics of Pecten maximus (L., 1758) larvae - Gigot, Mathilde; Olivier, Frédéric; Cervello, Gauthier; Tremblay, Rejean; Mathias, Delphine; Meziane, Tarik; Chauvaud, Laurent; Bonnel, Julien (Marine Pollution Bulletin, 2023)
One of the biggest challenges of the 21st century is to reduce carbon emissions and offshore wind turbines seem to be an efficient solution. However, during the installation phase, high levels of noise are emitted whose impacts remain not well known, particularly on benthic marine invertebrates displaying a bentho-planktonic life-cycle. For one century, larval settlement and subsequent recruitment has been considered as a key topic in ecology as it determines largely population renewal. Whereas several recent studies have shown that trophic pelagic but also natural soundscape cues could trigger bivalve settlement, the role of anthropogenic noise remains poorly documented. Therefore, we conducted experiments to assess potential interacting effects of diet and pile driving or drilling sounds on the great scallop (Pecten maximus) larval settlement. We demonstrate here that pile driving noise stimulates both growth and metamorphosis as well as it increases the total lipid content of competent larvae. Conversely, drilling noise reduces both survival and metamorphosis rates. For the first time, we provide evidence of noise impacts associated to MREs installation on P. maximus larvae and discuss about potential consequences on their recruitment.
Keywords: Anthropophony; larval settlement; Metamorphosis trigger; Pecten maximus; recruitment; Wind turbine

Recruitment dynamics of Hiatella arctica within a high Arctic site (Young Sound Fjord, NE Greenland) - Veillard, Delphine; Tremblay, Rejean; Sejr, Mikael K.; Chauvaud, Laurent; Cam, Emmanuelle; Olivier, Frédéric (Polar Biology, 2023)
Recruitment dynamics including what determines the success or failure of Arctic benthic invertebrates are poorly known despite their important role for population dynamics. The main objective of this study was to assess the potential influence of extreme physical constraints related to freshwater discharge on the recruitment of a dominant bivalve Hiatella arctica within a High Arctic fjord (Young Sound, NE Greenland). We collected young recruits over several sampling periods from 2016 to 2018 at two contrasting sites (inner vs. middle fjord) for 5-weeks to 12-months and measured their abundance, size at metamorphosis and lipid class composition. Young stages of H. arctica settled from June to the end of October, when trophic conditions are optimal. We hypothesize that growth stops during winter due to poor trophic conditions. Data suggest that abundance of recruits, their total lipid concentration and composition of lipid classes are similar at both sites. However, size classes were different with six separate cohorts detected at one station and one at the inner station, which may be attributed to discrete spawning events and possible secondary migration. Based on an assessment of their potential age, we hypothesize that spat batches recruiting earlier in the summer exhibit better growth performance probably related to better food quality and quantity.
Keywords: Arctic; Bivalve recruitment; Lipids classes; prodissoconch II

Reference Module in Earth Systems and Environmental SciencesModelling species distribution, ecosystem structure and function and climate change - Saint-Béat, Blanche; Nogues, Quentin; Nathalie Niquil; Bourdaud, Pierre; Virginie Raybaud; Goberville, Eric; Grégory Beaugrand; Ben Rais Lasram, Frida; Le Loc’h, François; Schickele, Alexandre (Elsevier, 2023)
In recent decades, oceans have been increasingly stressed by human activities that induced significant changes in its abiotic properties. Temperature increase, acidification, deoxygenation, deregulation of ocean currents are some examples of the anthropogenic impact on our oceans. In addition, pollution and overexploitation of marine resources will lead to severe and possibly irreversible changes for marine life. As environmental conditions directly affect the physiology of species, changes in species distribution and trophic interactions have already been observed and are expected to increase in the near future. Predicting future oceans is currently a great challenge for scientists that work to maintain, as best as possible, the goods and services they provide. In this context, ecologists have developed several modeling approaches able to simulate changes in both species distribution (Ecological Niche Models – ENMs) and interactions (static and dynamic food-web models). This chapter explains these two approaches in detail as well as the ways by which these two families of models can be coupled. In each part, the main existing algorithms will be reviewed, with their advantages and limitations, and some key examples retrieved from recent scientific literature will be presented. Finally, we will discuss the current issues of these methods and their potential improvement.

Revision of Hypseleotris (Teleostei: Eleotridae) from Indo-Pacific Islands using molecular and morphometric approaches, with description of one new species - Philippe Keith; Marion Mennesson (Zoological Journal of the Linnean Society, 2023)

Seasonal lipid dynamics of four Arctic bivalves: Implications for their physiological capacities to cope with future changes in coastal ecosystemsAbstract - Bridier, Guillaume; Olivier, Frédéric; Grall, Jacques; Chauvaud, Laurent; Sejr, Mikael K.; Tremblay, Rejean (Ecology and Evolution, 2023)
The Arctic is exposed to unprecedented warming, at least three times higher than the global average, which induces significant melting of the cryosphere. Freshwater inputs from melting glaciers will subsequently affect coastal primary production and organic matter quality. However, due to a lack of basic knowledge on the physiology of Arctic organisms, it remains difficult to understand how these future trophic changes will threaten the long-term survival of benthic species in coastal habitats. This study aimed to gain new insights into the seasonal lipid dynamics of four dominant benthic bivalves (Astarte moerchi, Hiatella arctica, Musculus discors, and Mya truncata) collected before and after sea ice break-up in a high-Arctic fjord (Young Sound, NE Greenland). Total lipid content and fatty acid composition of digestive gland neutral lipids were analyzed to assess bivalve energy reserves while the fatty acid composition of gill polar lipids was determined as a biochemical indicator of interspecies variations in metabolic activity and temperature acclimation. Results showed a decrease in lipid reserves between May and August, suggesting that bivalves have only limited access to fresh organic matter until sea ice break-up. The lack of seasonal variation in the fatty acid composition of neutral lipids, especially essential ω3 fatty acids, indicates that no fatty acid transfer from the digestive glands to the gonads occurs between May and August, and therefore, no reproductive investment takes place during this period. Large interspecies differences in gill fatty acid composition were observed, which appear to be related to differences in species life span and metabolic strategies. Such differences in gill fatty acid composition of polar lipids, which generally influence metabolic rates and energy needs, may imply that not all benthic species will be equally sensitive to future changes in primary production and organic matter quality in Arctic coastal habitats.
Keywords: Arctic coastal ecosystems; Bivalve; Climate Change; energy reserves; fatty acids; homeoviscous adaptation; meltwater inputs; metabolic rate depression

Sex-specific seasonal variations in the fatty acid and carotenoid composition of sea cucumber gonads and implications for aquaculture - Frank David; Herault, Gwen; Ameziane, Nadia; Tarik Meziane; Badou, Aicha; Cédric Hubas (Marine Biology, 2023)

Size-dependent response of the mussel collective behaviour to plastic leachates and predator cues - Marine Uguen; Sylvie M Gaudron; Nicastro, Katy R.; Zardi, Gerardo I.; Nicolas Spilmont; Seuront, Laurent (Science of The Total Environment, 2023)

Socio-political acceptability of floating offshore wind farms in France: challenges and perspectives for marine governance towards sustainability - Fofack-Garcia, Rhoda; Mazé, Camille; Safi, Georges; Lejart, Morgane; Chauvac, Nathalie; Thermes, Maud; Ragueneau, Olivier; Le Loc'h, Francois; Nathalie Niquil (Ocean & Coastal Management, 2023)

Spatial and temporal variability of common cuttlefish, Sepia officinalis, L. spawning grounds off North Europe - Laptikhovsky, Vladimir; Cooke, Gavan; Drerup, Christian; Jackson, Angus; MacLeod, Eleanor; Jean-Paul Robin (Fisheries Research, 2023)
Spatial and temporal dynamics of common cuttlefish, Sepia officinalis, spawning at north European shores was studied using data collected by the Cephalopod Citizen Science Project, Seasearch between 1995 and 2021 and a range of other internet sources for the same period. Reproduction begins in the western English Channel in March and gradually progresses eastward following water warming, attaining the Netherlands in May, when peripheral spawning grounds expand north to Norfolk and the Irish Sea. Despite a thermal regime favourable for egg development existing around the UK and Ireland, spawning is normally restricted to the English Channel and southernmost North Sea with egg masses occasionally observed as far north as Isle of Man and Norfolk.

Spatio-temporal distribution of juvenile fish species in Guadeloupean reefs (Lesser Antilles) - Vignaud, Léa; Vallès, Henri; Cordonnier, Sébastien; Chatagnon, Amélia; Lecchini, David; Charlotte R. Dromard (Regional Studies in Marine Science, 2023)

Spatiotemporal variations of Chlamys islandica larval shell morphometry between 2000 and 2018 in a depleted coastal scallop fishing area - Poitevin, Pierre; Roy, Virginie; Cervello, Gauthier; Olivier, Frédéric; Tremblay, Rejean (Estuarine, Coastal and Shelf Science, 2023)
Keywords: Chlamys islandica; Icelandic scallop; larval morphometry; prodissoconch; recruitment

Structural and functional characterization of an egg-laying hormone signaling system in a lophotrochozoan - The pacific oyster (Crassostrea gigas). - Favrel, P; Dubos, M P; Bernay, B; Pasquier, J; Schwartz, J; Lefranc, B; Mouret, L; Rivière, G; Leprince, J; Bondon, A (Gen Comp Endocrinol, 2023)
The egg-laying hormones (ELHs) of gastropod mollusks were characterized more than forty years ago. Yet, they have remained little explored in other mollusks. To gain insights into the functionality of the ELH signaling system in a bivalve mollusk - the oyster Crassostrea gigas, this study investigates the processing of its ELH precursor (Cragi-ELH) by mass spectrometry. Some of the ELH mature peptides identified in this study were subsequently investigated by nuclear magnetic resonance and shown to adopt an extended alpha-helix structure in a micellar medium mimicking the plasma membrane. To further characterize the ELH signaling system in C. gigas, a G protein-coupled receptor phylogenetically related to ecdysozoan diuretic hormone DH44 and corticotropin-releasing hormone (CRH) receptors named Cragi-ELHR was also characterized functionally and shown to be specifically activated by the two predicted mature ELH peptides and their N-terminal fragments. Both Cragi-ELH and Cragi-ELHR encoding genes were mostly expressed in the visceral ganglia (VG). Cragi-ELH expression was significantly increased in the VG of both fully mature male and female oysters at the spawning stage. When the oysters were submitted to a nutritional or hyposaline stress, no change in the expression of the ligand or receptor genes was recorded, except for Cragi-ELHR only during a mild acclimation episode to brackish water. These results suggest a role of Cragi-ELH signaling in the regulation of reproduction but not in mediating the stress response in our experimental conditions.

Structure of planktonic food web in the Gulf of Gabès (Southeastern Mediterranean): potential importance of heterotrophic and mixotrophic microzooplankton - Mejri Kousri, Kaouther; Belaaj Zouari, Amel; Meddeb, Marouan; Chkili, Oumayma; Nathalie Niquil; Tedetti, Marc; Pagano, Marc; Sammari, Cherif; Khammeri, Yosra; Bel Hassen, Malika; Sakka Hlaili, Asma (Aquatic Sciences, 2023)

Symbiont-induced phenotypic variation in an ecosystem engineer mediates thermal stress for the associated community - Zardi, Gerardo I.; Seuront, Laurent; Christopher D. McQuaid; Pierre William Froneman; Nicastro, Katy R. (Journal of Thermal Biology, 2023)

Temporal pesticide dynamics alter specific eukaryotic taxa in a coastal transition zone - Hervé, Vincent; Sabatier, Pierre; Lambourdière, Josie; Poulenard, Jérôme; Pascal Jean Lopez (Science of The Total Environment, 2023)

Threatened fish species in the Northeast Atlantic are functionally rare - Coulon, Noémie; Lindegren, Martin; Goberville, Eric; Toussaint, Aurèle; Receveur, Aurore; Arnaud Auber (Global Ecology and Biogeography, 2023)
The criteria used to define the International Union for Conservation of Nature (IUCN) Red List categories are essentially based on demographic parameters at the species level, but they do not integrate species' traits or their roles in ecosystems. Consequently, current IUCN-based protection measures may not be sufficient to conserve ecosystem functioning and services. Some species may have a singular combination of traits associated with unique functions. Such functionally distinct species are increasingly recognized as a key facet of biodiversity since they are, by definition, functionally irreplaceable. The aim of this study is to investigate whether threatened species are also functionally rare and to identify which traits determine extinction risk.

Trace elements in bivalve shells: How “vital effects” can bias environmental studies - Barrat, Jean-Alix; Chauvaud, Laurent; Olivier, Frédéric; Poitevin, Pierre; Rouget, Marie-Laure (Chemical Geology, 2023)
We report on the concentrations of rare earths (REE), Y, Mg, Mn, Cu, Zn, Sr, Ba, Pb and U in a series of wild scallops (Placopecten magellanicus) collected alive on the same day in Saint Pierre et Miquelon (a French archipelago located south of Newfoundland) and ranging in age from 2 to about 20 years. We analyzed representative fragments from the entire last annual shell growth increment of each animal to assess changes in trace element incorporation with age. No correlation with the age of the animals was obtained for Sr and Mn concentrations, which are quite variable from one individual to another, even of similar age. On the other hand, for REE, Y, Cu, Zn, Ba and U, the concentrations measured in the last annual growth increment formed by animals aged 2 to 7 years are similar. From 8 years of age, the concentrations of these elements increased very strongly (for example for Yb, almost by an order of magnitude between 8 and 20 years of age), and possibly with some variation between individuals of the same age. Two elements show a different behavior: Mg concentrations in the shell margins increase continuously with the age of the animals; Pb concentrations are scattered but seem to decrease with the age of the animals.This turning point in the behavior of the elements from 8 years of age coincides with major metabolic changes, since at this age wild P. magellanicus from Newfoundland reduce their growth, in favor of gamete production. Our results demonstrate that metabolic activity of the animals largely controls the incorporation of many trace elements into the shells. These results demonstrate that the age of the animals must be taken into account when their shells are used to study pollution or (paleo)

Transcriptome wide analyses reveal intraspecific diversity in thermal stress responses of a dominant habitat‐forming species - Nicastro, Katy R.; Pearson, G.A.; Ramos, X.; Vasco Pearson; Christopher Mc Quaid; Zardi, Gerardo I. (Scientific Reports, 2023)

Unmasking pipefish otolith using synchrotron-based scanning X-ray fluorescenceAbstract - Haÿ, Vincent; Berland, Sophie; Medjoubi, Kadda; Somogyi, Andrea; Mennesson, Marion I.; Philippe Keith; Lord, Clara (Scientific Reports, 2023)

Unmasking pipefish otolith using synchrotron-based scanning X-ray fluorescenceAbstract - Haÿ, Vincent; Berland, Sophie; Medjoubi, Kadda; Somogyi, Andrea; Mennesson, Marion I.; Keith, Philippe; Lord, Clara (Scientific Reports, 2023)

Updated Checklist of the Freshwater Shrimps (Decapoda: Caridea: Atyidae) of Mindoro Island, the Philippines, with a Description of a New Species of Caridina - de Mazancourt, Valentin; Freitag, Hendrik; von Rintelen, Kristina; Manuel-Santos, Marivene; von Rintelen, Thomas (Arthropoda, 2023)

The usefulness of food web models in the ecosystem services framework: Quantifying, mapping, and linking services supply - Nogues, Quentin; Baulaz, Yoann; Clavel, Joanne; Araignous, Emma; Bourdaud, Pierre; Ben Rais Lasram, Frida; Dauvin, Jean-Claude; Girardin, Valerie; Halouani, Ghassen; Le Loc'h, Francois; Loew-Turbout, Frédérique; Raoux, Aurore; et al. (Ecosystem Services, 2023)

What are the toxicity thresholds of chemical pollutants for tropical reef-building corals? A systematic review - Ouédraogo, Dakis-Yaoba; Mell, Hugo; Perceval, Olivier; Burga, Karen; Domart-Coulon, Isabelle; Hédouin, Laetitia; Delaunay, Mathilde; Mireille M.M. Guillaume; Castelin, Magalie; Calvayrac, Christophe; Kerkhof, Odile; Sordello, Romain; et al. (Environmental Evidence, 2023)

Why several when one can unite them all? Integrative taxonomic revision of Indo-Pacific freshwater pipefish (Nerophinae)Abstract - Vincent Haÿ; Marion Mennesson; Clara Lord; Philippe Keith (Zoological Journal of the Linnean Society, 2023)

Additional records of Sicyopus discordipinnis (Watson, 1995) (Oxudercidae: Sicydiinae) in Central Sulawesi, Indonesia. - Nurjirana; Burhanuddin, A I; Philippe Keith; Haris, A (Cybium, 2022)

Analysing economic costs of invasive alien species with the invacost R package - Leroy, Boris; Kramer, Andrew M.; Vaissière, Anne‐Charlotte; Kourantidou, Melina; Courchamp, Franck; Diagne, Christophe (Methods in Ecology and Evolution, 2022)

Anthropogenic Contaminants Shape the Fitness of the Endangered European Eel: A Machine Learning Approach - Bourillon, Bastien; Feunteun, Eric; Acou, Anthony; Trancart, Thomas; Teichert, Nils; Belpaire, Claude; Dufour, Sylvie; Bustamante, Paco; Aarestrup, Kim; Walker, Alan; Righton, David (Fishes, 2022)
European eel is thought to be a symbol of the effects of global change on aquatic biodiversity. The species has persisted for millions of years and faced drastic environmental fluctuations thanks to its phenotypic plasticity. However, the species has recently declined to historically low levels under synergistic human pressures. Sublethal chemical contamination has been shown to alter reproductive capacity, but the impacts and required actions are not fully addressed by conservation plans. This paper proposes a modelling approach to quantify the effects of sublethal contamination by anthropogenic pollutants on the expression of life history traits and related fitness of the critically endangered European eel. Material and Methods: We sampled female silver eels from eight different catchments across Europe previously shown to be representative of the spectrum of environmental variability and contamination. We measured 11 fitness-related life history traits within four main categories: fecundity, adaptability and plasticity, migratory readiness, and spawning potential. We used machine learning in models to explore the phenotypic reaction (expression of these life history traits) according to geographical parameters, parasite burdens (the introduced nematode Anguillicoloides crassus) and anthropogenic contaminants (persistent organic pollutants (POPs) in muscular tissue and trace elements (TEs) in gonads, livers and muscles). Finally, we simulated, the effects of two management scenarios—contamination reduction and contamination increase—on the fecundity and recruitment. Results: Contamination in our sampling was shown to have a stronger control on life history traits than do geographic and environmental factors that are currently described in the literature. We modelled different contamination scenarios to assess the benefit of mitigation: these scenarios suggest that reducing pollutants concentrations to the lowest values that occurred in our sampling design would double the fecundity of eels compared to the current situation. Discussion: Remediation of contamination could represent a viable management option for increasing the resilience of eel populations, with much more effects than solely reducing fishing mortality. More broadly, our work provides an innovative way for quantitative assessment of the reaction norms of species’ biological traits and related fecundity to contamination by organic and inorganic pollutions thus opening new management and conservation pathways to revert the erosion of biodiversity.

Arsenic and chlordecone contamination and decontamination toxicokinetics in Sargassum sp. - Devault, Damien A.; Massat, Félix; Baylet, Alexandre; Dolique, Franck; Pascal Jean Lopez (Environmental Science and Pollution Research, 2022)

Assessing the state of marine biodiversity in the Northeast Atlantic - McQuatters-Gollop, A.; Guérin, L.; Arroyo, N.L.; Aubert, A.; Artigas, L.F.; Bedford, J.; Corcoran, E.; Dierschke, V.; Elliott, S.A.M.; Geelhoed, S.C.V.; Gilles, A.; González-Irusta, J.M.; et al. (Ecological Indicators, 2022)

Bi-decadal changes in nutrient concentrations and ratios in marine coastal ecosystems: The case of the Arcachon bay, France - Lheureux, A.; David, V.; Del Amo, Y.; Soudant, D.; Auby, I.; Ganthy, F.; Blanchet, H.; Cordier, M-A.; Costes, L.; Ferreira, S.; Mornet, L.; Nowaczyk, A.; et al. (Progress in Oceanography, 2022)

Big data approaches to the spatial ecology and conservation of marine megafauna - Grémillet, David; Chevallier, Damien; Guinet, Christophe (ICES Journal of Marine Science, 2022)

Biologging of emperor penguins – attachment techniques and associated deployment performance - Houstin, Aymeric; Zitterbart, Daniel; Winterl, Alexander; Richter, Sebastian; Planas-Bielsa, Víctor; Chevallier, Damien; Ancel, André; Fournier, Jérôme; Fabry, Ben; Le Bohec, Céline (PLoS ONE, 2022)

Can artificial magnetic fields alter the functional role of the blue mussel, Mytilus edulis? - Albert, Luana; Maire, Olivier; Frédéric Olivier; Lambert, Christophe; Romero-Ramirez, Alicia; Jolivet, Aurélie; Chauvaud, Laurent; Chauvaud, Sylvain (Marine Biology, 2022)
Along European coasts, the rapid expansion of marine renewable energy devices and their buried power cables, raises major societal concerns regarding the potential effects of their magnetic field emissions (MFs) on marine species and ecosystem functioning. MFs occur at a local spatial scale, which makes sessile species the primary target of chronic and high-intensity exposures. Some of them, as ecosystem engineers, have critical functions in coastal habitats whose behavioral alteration may drive profound consequences at the ecosystem level. In this context, the present experimental study explored the effects of short exposure to direct current MFs, on the feeding behavior of a widespread ecosystem engineer, the blue mussel (Mytilus edulis). A repeated measure design was carried out with adult mussels successively exposed to control treatment (ambient magnetic field of 47 μT) and artificial MF treatment (direct current of 300 μT produced by Helmholtz coils), as measured around power cables. The filtration activity was assessed through valve gap monitoring using an automated image analysis system. The clearance rate was estimated simultaneously by measuring the decrease in algal concentration using flow cytometry. Our findings revealed that mussels placed in MF treatment did not exhibit observable differences in valve activity and filtration rate, thus suggesting that, at such an intensity, artificial MFs do not significantly impair their feeding behavior. However, additional research is required to investigate the sensitivity of other life stages, the effects of mid to long-term exposure to alternative and direct current fields and to test various MF intensities.
Keywords: Coastal environments; Ecosystem engineers; Filter-feeders; Magnetic fields; Mytilus edulis; Submarine power cables

Carbon dynamics driven by seawater recirculation and groundwater discharge along a forest-dune-beach continuum of a high-energy meso-macro-tidal sandy coast - Charbonnier, Céline; Anschutz, Pierre; Gwenaël Abril; Mucci, Alfonso; Deirmendjian, Loris; Poirier, Dominique; Bujan, Stéphane; Lecroart, Pascal (Geochimica et Cosmochimica Acta, 2022)

Careful amendment of morphological data sets improves phylogenetic frameworks: re-evaluating placement of the fossil Amiskwia sagittiformis - Bekkouche, Nicolas; Gąsiorowski, Ludwik (Journal of Systematic Palaeontology, 2022)

Cephalopod palaeobiology: evolution and life history of the most intelligent invertebratesAbstract - Klug, Christian; Laure Bonnaud-Ponticelli; Nabhitabhata, Jaruwat; Fuchs, Dirk; De Baets, Kenneth; Cheng, Ji; Hoffmann, René (Swiss Journal of Palaeontology, 2022)

Chapter 6 - Fishes and Estuarine Environmental Health - Cabral, Henrique N.; Borja, Angel; Fonseca, Vanessa F.; Harrison, Trevor D.; Teichert, Nils; Lepage, Mario; Leal, Miguel C. (Wiley, 2022)
This chapter addresses the use of fish as indicators of environmental health. The main anthropogenic pressures impacting estuarine fishes are reviewed, as well as the main types of responses by fishes at different levels of biological organisation. Fishes have been widely used to assess estuarine health through different methodological approaches, namely comparisons with historical data or reference conditions, experimental approaches, environmental impact or risk assessment methods, as well as qualitative or quantitative indicators and models. A large number of multi-metric indices based on fish have been proposed and are routinely used in environmental assessments, although to disentangle natural variability from anthropogenic pressures in a multi-stress context of global change is still a major challenge.

Characterisation of long-term evolution (1950–2016) and vulnerability of Mayotte’s shoreline using aerial photographs and a multidisciplinary vulnerability index - Courteille, Marine; Jeanson, Matthieu; Collin, Antoine; James, Dorothée; Claverie, Thomas; Charpentier, Michel; Gairin, Emma; René-Trouillefou, Malika; Giraud-Renard, Eléa; Franck Dolique; Lecchini, David (Regional Studies in Marine Science, 2022)

Chlordecone-contaminated epilithic biofilms show increased adsorption capacities - Cédric Hubas; Monti, Dominique; Jean-Michel Mortillaro; Augagneur, Sylvie; Carbon, Anne; Duran, Robert; Karama, Solange; Tarik Meziane; Pardon, Patrick; Risser, Théo; Tapie, Nathalie; Najet Thiney; et al. (Science of The Total Environment, 2022)

Classification of underwater photogrammetry data for temperate benthic rocky reef mapping - Ternon, Q.; Danet, V.; Thiriet, P.; Ysnel, F.; Eric Feunteun; Collin, A. (Estuarine, Coastal and Shelf Science, 2022)

Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat - Mazière, C.; Bodo, M.; Perdrau, M.A.; Cravo-Laureau, C.; Duran, Robert; Christine Dupuy; Cédric Hubas (Science of The Total Environment, 2022)

CO2 and CH4 emissions from coastal wetland soils - Marchand, Cyril; Frank David; Jacotot, Adrien; Leopold, Audrey; Ouyang, Xiaoguang (Carbon Mineralization in Coastal Wetlands, 2022)

Coastal ocean acidification in Brazil: a brief overview and perspectives - Cotovicz Jr., Luiz C; Valente Marins, Rozane; Gwenaël Abril (Arquivos de Ciências do Mar, 2022)

Colimitation assessment of phytoplankton growth using a resource use efficiency approach in the Bay of Seine (French-English Channel) - Serre-Fredj, Léon; Chasselin, Léo; Jolly, Orianne; Jacqueline, Franck; Pascal Claquin (Journal of Environmental Management, 2022)

Colonisation of artificial structures by primary producers: competition and photosynthetic behaviour - Vivier, Baptiste; Navon, Maxime; Dauvin, Jean-Claude; Chasselin, Léo; Deloor, Maël; Orvain, Francis; Rusig, Anne-Marie; Mussio, Isabelle; Boutouil, Mohamed; Pascal Claquin (Biofouling, 2022)

Contrasting organic matter composition in pristine and eutrophicated mangroves revealed by fatty acids and stable isotopes (Rio de Janeiro, Brazil) - Chynel, Mathias; Rockomanovic, Sofia; Gwenaël Abril; Barroso, Glenda; Marotta, Humberto; Machado, Wilson; Sanders, Christian J.; Najet Thiney; Tarik Meziane (Estuarine, Coastal and Shelf Science, 2022)
Mangrove sediments have a high capacity of carbon storage, as the result of larger organic matter (OM) inputs from mangrove trees (litter fall and fine roots production) than OM microbial degradation and export to coastal waters. Mangrove sediments also act as traps for suspended matter and particulate OM (POM) from surrounding water masses. Fatty acids (FAs) markers, δ13C and δ15N signatures were used here to characterize the OM composition in three mangroves located in three coastal embayments of the Rio de Janeiro state (Brazil) with increasing urbanization from a pristine mangrove M1 to a moderately impacted mangrove M2 and a highly impacted mangrove M3. In these mangroves, the δ15N signature of tree leaves and sediments increases with anthropogenic influence, consistent with a large-scale eutrophication gradient along the three regions. At mangrove M1, predominant OM inputs from mangrove trees are highlighted by high proportions of long-chain fatty acids, particularly in the inland station, where high organic carbon concentrations (126 ± 108 mg g−1) indicate limited sedimentation of mineral particles and high carbon storage capacities. The sedimentary OM of M3 mangrove was more labile as confirmed by the higher proportions of algal fatty acids, enriched δ13C signature and the C/N ratio 1.6 times lower (p < 0.001) than in the pristine mangrove M1. At the M2 mangrove site, high contribution of bacterial FAs (around 20%) to sedimentary OM and high proportion of poorly biodegradable saturated fatty acids suggest that bacteria degrade algal labile OM in surface sediments but do not mineralize the most refractory fraction of OM. At the eutrophic M3 site, our findings suggest that deposition of labile POM induced an increase of fungal biomass on the sediment, apparently enhancing the microbial loop, and potentially leading to mineralization of refractory OM and carbon losses through a priming effect.

Detection of the protistan parasite, Haplosporidium costale in Crassostrea gigas oysters from the French coast: A retrospective study - Cherif--Feildel, Maëva; Lagy, Coralie; Quesnelle, Yann; Bouras, Hélène; Trancart, Suzanne; Maryline Houssin (Journal of Invertebrate Pathology, 2022)

Dynamic evolution of transient receptor potential vanilloid (TRPV) ion channel family with numerous gene duplications and losses - Morini, Marina; Bergqvist, Christina A.; Asturiano, Juan F.; Larhammar, Dan; Sylvie Dufour (Frontiers in Endocrinology, 2022)

Effects of chronic exposure of metals released from the dissolution of an aluminium galvanic anode on the Pacific oyster Crassostrea gigas - Alexandre Levallois; Christelle Caplat; Olivier Basuyaux; Jean-Marc Lebel; Antoine Laisney; Katherine Costil; Antoine Serpentini (Aquatic Toxicology, 2022)
Among the anthropogenic sources releasing metallic species into the marine environment, the galvanic anode cathodic protection system (GACP) is widely used to protect submerged metallic structures from corrosion. Galvanic anodes are an alloy of metals of which the main component is aluminum or zinc. Very few studies were performed to study their potential biological effects. We investigated the chronic toxicity of an aluminum-based galvanic anode on the Pacific oyster, Crassostrea gigas. Oysters were exposed for 84 days to three concentrations of aluminum (50, 100 and 300 µg L−1) obtained with an electrochemical experimental device simulating the dissolution of a galvanic anode. At different exposure times, we studied a battery of biomarkers of the immune system, reproductive parameters and the metabolic state of the oysters. Results demonstrated a sensitivity of oysters at the highest concentration and some biological effects were observed especially for the malondialdehyde content in the digestive gland after 84 days of exposure. In addition to these biomarkers, the bioaccumulation of the different metals composing the anode was measured in oysters’ tissues. Bivalves bioaccumulated more zinc than aluminum, even if aluminium was present in greater concentrations during exposures. Moreover, exposure time did not influence the bioaccumulation of aluminum in contrast to zinc.
Keywords: aluminium; Bioaccumulation; Biological effects; Crassostrea gigas; galvanic anode; Oyster

Estimation of the Maternal Investment of Sea Turtles by Automatic Identification of Nesting Behavior and Number of Eggs Laid from a Tri-Axial Accelerometer - Jeantet, Lorène; Hadetskyi, Vadym; Vigon, Vincent; Korysko, François; Paranthoen, Nicolas; Chevallier, Damien (Animals, 2022)

European flounder foraging movements in an estuarine nursery seascape inferred from otolith microchemistry and stable isotopes - Teichert, Nils; Lizé, Anne; Tabouret, Hélène; Roussel, Jean-Marc; Bareille, Gilles; Trancart, Thomas; Acou, Anthony; Virag, Laure-Sarah; Pecheyran, Christophe; Alexandre Carpentier; Feunteun, Eric (Marine Environmental Research, 2022)
Despite the importance of estuarine nurseries in the regulation of many fish stocks, temporal and spatial movements and habitat use patterns of juvenile fish remain poorly understood. Overall, combining several movement metrics allowed us to characterize dispersal patterns of juvenile flounder, Platichthys flesus, along an estuarine seascape. Specifically, we investigated otolith microchemistry signatures (Sr:Ca and Ba:Ca ratios) and stable isotope ratios (δ13C and δ15N) in muscles of these juveniles, during three consecutive years to assess inter-annual fluctuations in their home range and isotopic niches. The morphological condition and lipid content of individuals were lower in years of high as compared to low dispersal along the estuarine gradient. We discuss these results in relation to the ecosystem productivity and intra- and inter-specific competition level, which in turn affects movements and foraging behaviors of juvenile flounders.

European Spatial Data for Coastal and Marine Remote SensingLocal Circalittoral Rocky Seascape Structuring Fish Community: Insights from a Photogrammetric Approach - Ternon, Quentin; Collin, Antoine; Feunteun, Eric; Ysnel, Frédéric; Danet, Valentin; Guillaume, Manon; Thiriet, Pierre (Springer International Publishing, 2022)
Fish face multiple environmental pressures acting as multiscale filters structuring the community [6]. Study of the effect of local (~100 m2) habitat components such as habitat architecture, substrate composition, and benthic community on fish community is still limited because of the technical difficulties to sample reliable descriptors of all these habitat components. Nevertheless, the effect of the 3D architecture, especially the complexity, has been highlighted to act as an important variable, locally structuring fish communities and leading to an increase in diversity (species richness and Shannon index) and quantity (total density and biomass) of fish [1]. Photogrammetry is extending to submarine environment and allows to produce very fine information of the architecture and substrate composition [5], as well as of the benthic community [4]. The influence of the different habitat components (i.e., architecture, substrate composition, and benthic community) on the structure of fish community is here investigated, as well as the interest of photogrammetry in comparison to visual observation (Fig. 1).
Keywords: Architecture; Benthic community; Fish community; Photogrammetry; Seascape; Substrate composition

Exceptional preservation of internal organs in a new fossil species of freshwater shrimp (Caridea: Palaemonoidea) from the Eocene of Messel (Germany) - de Mazancourt, Valentin; Wappler, Torsten; Wedmann, Sonja (Scientific Reports, 2022)
A new species of extinct freshwater shrimp was discovered in the Eocene deposit of the Messel Pit Konservat-Lagerstätte. This rare find is represented by only a few specimens, one of which showing exceptionally preserved soft tissues and other internal parts like the stomach with possibly gastric ossicles in place, branchiae, the ovary, and the left mandible, never described in a fossil shrimp. The new species Bechleja brevirostris n. sp. is characterized by a short rostrum bearing 6–8 dorsal spines and one ventral tooth, and long second pereiopods with strong chelae. One additional specimen shows a slightly different morphology and might belong to a different species. The systematic position of the species among the superfamily Palaemonoidea is discussed, as well as implications for the knowledge of the paleoenvironment of Lake Messel and the paleobiogeography of the Eocene.

Expected contraction in the distribution ranges of demersal fish of high economic value in the Mediterranean and European SeasAbstract - Ben Lamine, Emna; Schickele, Alexandre; Goberville, Eric; Beaugrand, Grégory; Allemand, Denis; Raybaud, Virginie (Scientific Reports, 2022)
Fisheries and aquaculture are facing many challenges worldwide, especially adaptation to climate change. Investigating future distributional changes of largely harvested species has become an extensive research topic, aiming at providing realistic ecological scenarios on which to build management measures, to help fisheries and aquaculture adapt to future climate-driven changes. Here, we use an ensemble modelling approach to estimate the contemporary and future distributional range of eight demersal fish species of high economic value in the Mediterranean Sea. We identify a cardinal influence of (i) temperature on fish species distributions, all being shaped by yearly mean and seasonality in sea bottom temperature, and (ii) the primary production. By assessing the effects of changes in future climate conditions under three Representative Concentration Pathway (RCP2.6, RCP4.5 and RCP8.5) scenarios over three periods of the twenty-first century, we project a contraction of the distributional range of the eight species in the Mediterranean Sea, with a general biogeographical displacement towards the North European coasts. This will help anticipating changes in future catch potential in a warmer world, which is expected to have substantial economic consequences for Mediterranean fisheries.

Fibropapillomatosis Prevalence and Distribution in Immature Green Turtles (Chelonia mydas) in Martinique Island (Lesser Antilles) - Roost, Thibaut; Schies, Jo-Ann; Girondot, Marc; Robin, Jean-Patrice; Lelong, Pierre; Martin, Jordan; Siegwalt, Flora; Jeantet, Lorène; Giraudeau, Mathieu; Le Loch, Guillaume; Bejarano, Manola; Bonola, Marc; et al. (EcoHealth, 2022)

First evidence of migration across the South Pacific in endangered Amsterdam albatross and conservation implications - Delord, K.; Poupart, Timothée; Nicolas Gasco; Weimerskirch, H.; Barbraud, Christophe (Marine Policy, 2022)

First evidence of underwater vocalizations in green sea turtles Chelonia mydas - Charrier, Isabelle; Jeantet, Lorène; Maucourt, Léo; Régis, Sidney; Lecerf, Nicolas; Benhalilou, Abdelwahab; Chevallier, Damien (Endangered Species Research, 2022)

First record of Hippichthys albomaculosus Jenkins & Mailautoka, 2010 (Syngnathidae) in New Caledonia. Cybium, 46(1): 53-55. - Vincent Haÿ; Charpin Nicolas; Philippe Keith; Clara Lord; Marion Mennesson (Cybium, 2022)

Food selection and habitat use patterns of immature green turtles (Chelonia mydas) on Caribbean seagrass beds dominated by the alien species Halophila stipulacea - Siegwalt, Flora; Jeantet, Lorène; Lelong, Pierre; Martin, Jordan; Girondot, Marc; Bustamante, Paco; Benhalilou, Abdelwahab; Murgale, Céline; Andreani, Lucas; Jacaria, François; Campistron, Guilhem; Lathière, Anthony; et al. (Global Ecology and Conservation, 2022)

From taxonomic to functional dark diversity: Exploring the causes of potential biodiversity and its implications for conservation - Morel, Loïs; Jung, Vincent; Chollet, Simon; Frédéric Ysnel; Barbe, Lou (Journal of Applied Ecology, 2022)

A functional vulnerability framework for biodiversity conservation - Auber, Arnaud; Waldock, Conor; Maire, Anthony; Goberville, Eric; Albouy, Camille; Algar, Adam C.; McLean, Matthew; Brind'Amour, Anik; Green, Alison L.; Tupper, Mark; Vigliola, Laurent; Kaschner, Kristin; et al. (Nature Communications, 2022)
Setting appropriate conservation strategies in a multi-threat world is a challenging goal, especially because of natural complexity and budget limitations that prevent effective management of all ecosystems. Safeguarding the most threatened ecosystems requires accurate and integrative quantification of their vulnerability and their functioning, particularly the potential loss of species trait diversity which imperils their functioning. However, the magnitude of threats and associated biological responses both have high uncertainties. Additionally, a major difficulty is the recurrent lack of reference conditions for a fair and operational measurement of vulnerability. Here, we present a functional vulnerability framework that incorporates uncertainty and reference conditions into a generalizable tool. Through in silico simulations of disturbances, our framework allows us to quantify the vulnerability of communities to a wide range of threats. We demonstrate the relevance and operationality of our framework, and its global, scalable and quantitative comparability, through three case studies on marine fishes and mammals. We show that functional vulnerability has marked geographic and temporal patterns. We underline contrasting contributions of species richness and functional redundancy to the level of vulnerability among case studies, indicating that our integrative assessment can also identify the drivers of vulnerability in a world where uncertainty is omnipresent.

Geographic and taxonomic trends of rising biological invasion costs - Haubrock, Phillip J.; Cuthbert, Ross N.; Hudgins, Emma J.; Crystal-Ornelas, Robert; Kourantidou, Melina; Moodley, Desika; Liu, Chunlong; Turbelin, Anna J.; Leroy, Boris; Courchamp, Franck (Science of The Total Environment, 2022)

Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae) - Brito, Paulo M.; Alvarado-Ortega, Jésus; François J Meunier (2022)
The palaeohistology of the teeth and bony skeleton of the Late Jurassic gar †Nhanulepisosteus mexicanus is described in detail from thin sections. The teeth are composed of a cone of orthodentine with a pulp cavity filled with parallel canals of osteodentine as variety of eusthenodont type plicidentine. These conspicuous histological features differentiate †Nhanulepisosteus from the majority of extant and fossil lepisosteids. The teeth are crowned with a small apical cap of acrodine, and are surrounded by a ridged layer of enamel. The bony tissues contain star-shaped osteocytes and canaliculi of Williamson matching exactly those in living lepisosteids, other holosteans, and some basal teleosts. Although the dental histology is distinct from that of extant gar species, we consider these differences are related to eco-morphological factors, noting that this pattern of histological arrangement is also found in other fossil gar species.
Keywords: Bone; Jurassic; Lepisosteidae; Palaeohistology; plicidentine; Teeth; †Nhanulepisosteus

Host use of the elkorn coral crab Domecia acanthophora (Brachyura : Domeciidae), with a phylogeny of the genus - Sancia ET Van der Meij; Henrique Bravo; Yun JH Scholten; Charlotte R. Dromard (Cahier de Biologie Marine, 2022)

Identification of a New Set of Polypeptidic Sex Pheromones from Cuttlefish (Sepia officinalis) - Céline Zatylny-Gaudin; Corre, Erwan; Zanuttini, Bruno; Endress, Maxime; Bernay, Benoît; Pontin, Julien; Leduc, Alexandre; Joël Henry (Marine Biotechnology, 2022)

Immuno-Enzymatic and Proteomic Approaches for Sexing the African Bonytongue (Heterotis niloticus Cuvier, 1829) - Koua, N’Zi Daniel; Henry, Joël; Corre, Erwan; Pontin, Julien; Bernay, Benoît; Núñez-Rodríguez, Jesús (Fishes, 2022)

Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations - Amelot, Morgane; Plard, Floriane; Guinet, Christophe; Arnould, John P. Y.; Nicolas Gasco; Tixier, Paul (Biology Letters, 2022)

Insights into the behavioural responses of juvenile thornback ray - Albert, Luana; Frédéric Olivier; Jolivet, Aurélie; Chauvaud, Laurent; Chauvaud, Sylvain (Journal of Fish Biology, 2022)
As part of energy transition, marine renewable energy devices (MRED) are currently expanding in developed countries inducing the deployment of dense networks of submarine power cables. Concern has thus raised about the cable magnetic emissions (direct or alternating current) because of potential interference with the sensorial environment of magneto-sensitive species, such as sharks and rays. This study sought to assess the short-term behavioural responses of juvenile thornback rays (Raja clavata) (n = 15) to direct and alternating (50 Hz) uniform 450-μT artificial magnetic fields using 1 h focal-sampling design based on a detailed ethogram. Careful control of magnetic fields' temporal and spatial scales was obtained in laboratory conditions through a custom-made Helmholtz coil device. Overall, qualitative or quantitative behavioural responses of juvenile rays did not significantly vary between control vs. exposed individuals over the morning period. Nonetheless, rays under direct current magnetic field increased their activity over the midday period. Synchronisation patterns were also observed for individuals receiving alternating current exposure (chronologic and qualitative similarities) coupled with a high interindividual variance. Further studies should consider larger batches of juveniles to address the effect of long-term exposure and explore the sensitivity range of rays with dose-response designs.

An integrative phylogenetic approach for inferring relationships of fossil gobioids - Gierl, Christoph; Dohrmann, Martin; Philippe Keith; Humphreys, William; Esmaeili, Hamid R.; Vukić, Jasna; Šanda, Radek; Reichenbacher, Bettina (PLOS ONE, 2022)

Interaction between the diatom Cylindrotheca closterium and a siliceous mortar in a silica-limited environment - Georges, Marine; Bourguiba, Amel; Boutouil, Mohamed; Chateigner, Daniel; Jolly, Orianne; Pascal Claquin (Construction and Building Materials, 2022)

Interannual variability of the initiation of the phytoplankton growing period in two French coastal ecosystems - Poppeschi, Coline; Charria, Guillaume; Daniel, Anne; Verney, Romaric; Rimmelin-Maury, Peggy; Retho, Michaël; Goberville, Eric; Emilie Grossteffan; Plus, Martin (Biogeosciences, 2022)
Decadal time series of chlorophyll a concentrations sampled at high and low frequencies are explored to study climate-induced impacts on the processes inducing interannual variations in the initiation of the phytoplankton growing period (IPGP) in early spring. We specifically detail the IPGP in two contrasting coastal temperate ecosystems under the influence of rivers highly rich in nutrients: the Bay of Brest and the Bay of Vilaine. In both coastal ecosystems, we observed a large interannual variation in the IPGP influenced by sea temperature, river inputs, light availability (modulated by solar radiation and water turbidity), and turbulent mixing generated by tidal currents, wind stress, and river runoff. We show that the IPGP is delayed by around 30 d in 2019 in comparison with 2010. In situ observations and a one-dimensional vertical model coupling hydrodynamics, biogeochemistry, and sediment dynamics show that the IPGP generally does not depend on one specific environmental factor but on the interaction between several environmental factors. In these two bays, we demonstrate that the IPGP is mainly caused by sea surface temperature and available light conditions, mostly controlled by the turbidity of the system before first blooms. While both bays are hydrodynamically contrasted, the processes that modulate the IPGP are similar. In both bays, the IPGP can be delayed by cold spells and flood events at the end of winter, provided that these extreme events last several days.

Sicyopterus garra Hora, 1925, a valid species of sicydiine goby from the Andaman Islands, India - Praveenraj, Jayasimhan; Kiruba‐Sankar, Rajendran; Saravanan, Kandasamy; Thackeray, Tejas; Singh, Pratima; Knight, John Daniel Marcus; Philippe Keith (Journal of Fish Biology, 2022)

Knowledge gaps in economic costs of invasive alien fish worldwide - Haubrock, Phillip J.; Bernery, Camille; Cuthbert, Ross N.; Liu, Chunlong; Kourantidou, Melina; Leroy, Boris; Turbelin, Anna J.; Kramer, Andrew M.; Verbrugge, Laura N.H.; Diagne, Christophe; Courchamp, Franck; Gozlan, Rodolphe E. (Science of The Total Environment, 2022)

La vie en milieu extrême - Juliette Ravaux; Sébastien Duperron (2022)

Life history and ossification patterns in Miguashaia bureaui reveal the early evolution of osteogenesis in coelacanths - Mondéjar Fernández, Jorge; François J Meunier; Cloutier, Richard; Clément, Gaël; Laurin, Michel (PeerJ, 2022)
The study of development is critical for revealing the evolution of major vertebrate lineages. Coelacanths have one of the longest evolutionary histories among osteichthyans, but despite access to extant representatives, the onset of their weakly ossified endoskeleton is still poorly understood. Here we present the first palaeohistological and skeletochronological study of Miguashaia bureaui from the Upper Devonian of Canada, pivotal for exploring the palaeobiology and early evolution of osteogenesis in coelacanths. Cross sections of the caudal fin bones show that the cortex is made of layers of primary bone separated by lines of arrested growth, indicative of a cyclical growth. The medullary cavity displays remnants of calcified cartilage associated with bony trabeculae, characteristic of endochondral ossification. A skeletochronological analysis indicates that rapid growth during a short juvenile period was followed by slower growth in adulthood. Our new analysis highlights the life history and palaeoecology of Miguashaia bureaui and reveals that, despite differences in size and habitat, the poor endoskeletal ossification known in the extant Latimeria chalumnae can be traced back at least 375 million years ago.

Linking eutrophication to carbon dioxide and methane emissions from exposed mangrove soils along an urban gradient - Barroso, Glenda C.; Gwenaël Abril; Machado, Wilson; Abuchacra, Rodrigo C.; Peixoto, Roberta B.; Bernardes, Marcelo; Marques, Gabriela S.; Sanders, Christian J.; Oliveira, Gabriela B.; Oliveira Filho, Silvio R.; Amora-Nogueira, Leonardo; Marotta, Humberto (Science of The Total Environment, 2022)

Long-Term Evolution of the Guadeloupean Shoreline (1950–2017) - Giraud-Renard, Eléa; Franck Dolique; Collin, Antoine; James, Dorothée; Gairin, Emma; Courteille, Marine; Beaufort, Océane; René-Trouillefou, Malika; Dulormne, Maguy; Jeanson, Matthieu; Lecchini, David (Journal of Coastal Research, 2022)

Macrozooplankton and micronekton diversity and associated carbon vertical patterns and fluxes under distinct productive conditions around the Kerguelen Islands - Cotté, C.; Ariza, A.; Berne, A.; Habasque, J.; Lebourges-Dhaussy, A.; Roudaut, G.; Espinasse, B.; Hunt, B.P.V.; Pakhomov, E.A.; Henschke, N.; Clara Péron; Conchon, A.; et al. (Journal of Marine Systems, 2022)

Managing biological invasions: the cost of inaction - Ahmed, Danish A.; Hudgins, Emma J.; Cuthbert, Ross N.; Kourantidou, Melina; Diagne, Christophe; Haubrock, Phillip J.; Leung, Brian; Liu, Chunlong; Leroy, Boris; Petrovskii, Sergei; Beidas, Ayah; Courchamp, Franck (Biological Invasions, 2022)

Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators - Fiard, Maud; Cuny, Philippe; Sylvi, Léa; Cédric Hubas; Jézéquel, Ronan; Lamy, Dominique; Walcker, Romain; El Houssainy, Amonda; Heimbürger-Boavida, Lars-Eric; Robinet, Tony; Bihannic, Isabelle; Gilbert, Franck; et al. (Science of The Total Environment, 2022)

Methods to detect spatial biases in tracking studies caused by differential representativeness of individuals, populations and time - Morera‐Pujol, Virginia; Catry, Paulo; Magalhães, Maria; Clara Péron; Reyes‐González, José Manuel; Granadeiro, José Pedro; Militão, Teresa; Dias, Maria P.; Oro, Daniel; Dell'Omo, Giacomo; Müller, Martina; Paiva, Vitor H.; et al. (Diversity and Distributions, 2022)

Modelling past migrations to determine efficient management rules favouring silver eel escapement from a large regulated Floodplain Lake - Bourgeaux, Jacques; Teichert, Nils; Gillier, Jean-Marc; Danet, Valentin; Eric Feunteun; Acou, Anthony; Charrier, Fabien; Mazel, Virgile; Alexandre Carpentier; Trancart, Thomas (Journal for Nature Conservation, 2022)
As human activities caused a dramatic decline of European eel population since the 1970 s, the European Union has set targets to ensure a 40% escapement to the sea of the silver eel biomass by considerably reducing anthropogenic impact. Thus, human obstacles to fish migration like dams and hydropower plants should enable efficient management measures ensuring safe passage for eels during the migration. In order to provide a quick and efficient assessment of eel conservation measure applied to the sluice gates of a large floodplain lake, we implemented a novel evaluation method using predictions on past migration seasons when no management measure were applied. For this purpose, we collected acoustic telemetry monitoring data over three migration seasons and fitted a predictive model based on Boosted Regression Trees (BRTs) to describe the influence of environmental parameters on migration. The water level difference over two days proved to be decisive, along with early migration occasions in the season, as an increase of at least 10 cm water level was associated with a sharp increase of migration probability. We then used the BRT model to predict migration occasions at the dam over 8 past seasons and forecast the impact on escapement of management measures if they had been applied. Thanks to this original prospective assessment of dam management measures, we identified an enhanced opening decision rule, capable of increasing the eel escapement for each year of the study. The management measure is particularly efficient during the years with poor hydrological conditions (i.e. droughts), that is the periods with the lowest initial escapement rates. Finally, efficient management measures to increase silver eel escapement were based on increasing the number of gate opening days by only a few days per year (c.a. 15%). However, the management measure only focused on silver eel migration, so that further investigations should consider the impacts of other threats occurring during the life cycle. This study also provides a highly operational approach for fast evaluation of conservation measures, avoiding lengthy and expensive monitoring campaigns of classical ex-post assessments.
Keywords: Eel conservation; fish migration; Predictive model; Reservoir management

Modelling the distribution of vulnerable skate from fisheries dependent data using imperfect detection - Bisch, Amaëlle; Elliott, Sophie A.M.; Alexandre Carpentier; Acou, Anthony (Progress in Oceanography, 2022)

A multi-approach study to reveal eel life-history traits in an obstructed catchment before dam removal - Teichert, Nils; Lizé, Anne; Tabouret, Hélène; Gérard, Claudia; Bareille, Gilles; Acou, Anthony; Alexandre Carpentier; Trancart, Thomas; Virag, Laure-Sarah; Robin, Emma; Druet, Morgan; Prod’Homme, Jordan; et al. (Hydrobiologia, 2022)
River fragmentation is expected to impact not only movement patterns and distribution of eels within catchment, but also their life-history traits. Here, we used otolith multi-elemental signatures to reconstruct life sequences of European silver eels within an obstructed catchment, just before the removal of hydropower dams. Beyond providing an initial state, we hypothesized that otolith signatures can provide crucial information on the way eels use the watershed. Indeed, their spatial distribution is expected to shape life-history traits, including condition coefficient, trophic level, growth rate, or infection by metazoan parasites. While Sr:Ca and Ba:Ca ratios were complementary in tracing fish movements between freshwater and estuary, the Ba:Ca variations allowed to discriminate three freshwater sectors. The eels assigned to the midstream sector were more mobile and exhibited lower growth rates, probably in response to higher competition at the vicinity of dams. While most eels are currently produced by downstream and midstream sectors, eels assigned to upper reaches of connected tributaries generally display higher richness in native parasite and higher body condition and lipid reserve, known to promote the success of migration and reproduction. In the near future, the dam removals will represent an outstanding experimental framework for evaluating impacts of catchment reconnection.
Keywords: LA-ICP-MS; life-history trait; metazoan parasites; otolith microchemistry; phenotypic plasticity; river barrier

Multifaceted roles of the egg perivitelline layer in avian reproduction: Functional insights from the proteomes of chicken egg inner and outer sublayers - Brégeon, Mégane; Tomas, Daniel; Bernay, Benoît; Céline Zatylny-Gaudin; Georgeault, Sonia; Labas, Valérie; Réhault-Godbert, Sophie; Guyot, Nicolas (Journal of Proteomics, 2022)

Multi-method approach shows stock structure in Loligo forbesii squid - Sheerin, Edel; Barnwall, Leigh; Abad, Esther; Larivain, Angela; Oesterwind, Daniel; Petroni, Michael; Perales-Raya, Catalina; Jean-Paul Robin; Sobrino, Ignacio; Valeiras, Julio; O'Meara, Denise; Pierce, Graham J; et al. (ICES Journal of Marine Science, 2022)
Knowledge of stock structure is a priority for effective assessment of commercially-fished cephalopods. Loligo forbesii squid are thought to migrate inshore for breeding and offshore for feeding and long-range movements are implied from past studies showing genetic homogeneity in the entire neritic population. Only offshore populations (Faroe and Rockall Bank) were considered distinct. The present study applied mitchondrial and microsatellite markers (nine loci) to samples from Rockall Bank, north Scotland, North Sea, various shelf locations in Ireland, English Channel, northern Bay of Biscay, north Spain, and Bay of Cadiz. No statistically significant genetic sub-structure was found, although some non-significant trends involving Rockall were seen using microsatellite markers. Differences in L. forbesii statolith shape were apparent at a subset of locations, with most locations showing pairwise differences and statoliths from north Ireland being highly distinct. This suggests that (i) statolith shape is highly sensitive to local conditions and (ii) L. forbesii forms distinguishable groups (based on shape statistics), maintaining these groups over sufficiently long periods for local conditions to affect the shape of the statolith. Overall evidence suggests that L. forbesii forms separable (ecological) groups over short timescales with a semi-isolated breeding group at Rockall whose distinctiveness varies over time.

Multiple phytoplankton community responses to environmental change in a temperate coastal system: A trait-based approach - Elsa Breton; Goberville, Eric; Benoit Sautour; Ouadi, Anis; Skouroliakou, Dimitra-Ioli; Seuront, Laurent; Grégory Beaugrand; Kléparski, Loïck; Crouvoisier, Muriel; Pecqueur, David; Salmeron, Christophe; Cauvin, Arnaud; et al. (Frontiers in Marine Science, 2022)
The effect of environmental change in structuring the phytoplankton communities of the coastal waters of the Eastern English Channel was investigated by applying a trait-based approach on two decades (1996-2019) of monitoring on diatoms and Phaeocystis. We show that phytoplankton species richness in an unbalanced nutrient supply context was influenced by wind-driven processes, ecological specialization for dissolved inorganic phosphorous, temporal niche differentiation, and a competition-defense and/or a growth-defense trade-off, a coexistence mechanism where weak competitors (i.e., slower growing) are better protected against predation. Under the influence of both environmental perturbations (e.g., wind-driven processes, freshwater influence, unbalanced nutrient levels) and biotic interactions (e.g., competition, predation, facilitation), phytoplankton species exhibited specific survival strategies such as investment on growth, adaptation and tolerance of species to environmental stresses, silicification and resource specialization. These strategies have led to more speciose communities, higher productivity, functional redundancy and stability in the last decade. Our results revealed that the unbalanced nutrient reduction facilitated Phaeocystis blooms and that anthropogenic climate warming and nitrate reduction may threaten the diatom communities of the eastern English Channel in a near future. Our results provide strong support for biogeographical historical and niche-based processes in structuring the phytoplankton community in this temperate region. The variety of species responses that we characterized in this region may help to better understand future changes in pelagic ecosystems, and can serve as a basis to consider functional approaches for future ecosystem management.

Myctobase, a circumpolar database of mesopelagic fishes for new insights into deep pelagic prey fields - Woods, Briannyn; Trebilco, Rowan; Walters, Andrea; Hindell, Mark; Guy Duhamel; Flores, Hauke; Moteki, Masato; Patrice Pruvost; Reiss, Christian; Saunders, Ryan A.; Sutton, Caroline; Gan, Yi-Ming; et al. (Scientific Data, 2022)

New Insights Into the Evolution of Corticotropin-Releasing Hormone Family With a Special Focus on Teleosts - Maugars, Gersende; Mauvois, Xavier; Martin, Patrick; Rousseau, Karine; Aroua, Salima; Sylvie Dufour (Frontiers in Endocrinology, 2022)

Obtaining DNA Samples from Sensitive and Endangered Bird Species: A Comparison of Saliva and Blood Samples - Cambrone, Christopher; Motreuil, Sébastien; Reyes, Francis O.; Landestoy, Miguel A.; Cézilly, Frank; Bezault, Etienne (Ardeola, 2022)
Methods used to collect biological samples from birds for genetic analyses should allow high-quality DNA to be obtained in sufficient quantities, while limiting negative effects on sampled individuals. In this context, we assessed the potential use of saliva sampling (using buccal swabs) as an alternative to blood sampling (supposedly more stressful) in a near-threatened Caribbean-endemic, the White-crowned Pigeon Patagioenas leucocephala, a bird known to be highly sensitive to capture and handling, based on samples collected from 28 adults captured in the wild. We quantitatively and qualitatively compared DNA extracts, amplifications of two mitochondrial genes (∼430 bp and 1040 bp), and molecular sexing between saliva and blood samples. As expected, blood samples provided larger amounts of DNA of heavy molecular weight than buccal swabs. However, buccal swabs were as reliable as blood samples as a source of genetic material to sequence mtDNA. On the other hand, buccal swab samples might require an improved PCR protocol to sex all individuals successfully. We discuss the use of buccal swabs vs. blood sampling as a way to obtain DNA in relation to research objectives and minimising stress and harmful effects.

Organic Phosphorus Scavenging Supports Efficient Growth of Diazotrophic Cyanobacteria Under Phosphate DepletionData_Sheet_1.docx - Rabouille, Sophie; Tournier, Lauralie; Duhamel, Solange; Pascal Claquin; Crispi, Olivier; Talec, Amélie; Landolfi, Angela; Oschlies, Andreas (Frontiers in Microbiology, 2022)

Pairing AIS data and underwater topography to assess maritime traffic pressures on cetaceans: Case study in the Guadeloupean waters of the Agoa sanctuary - Madon, Bénédicte; Le Guyader, Damien; Jung, Jean-Luc; de Montgolfier, Benjamin; Pascal Jean Lopez; Foulquier, Eric; Bouveret, Laurent; Le Berre, Iwan (Marine Policy, 2022)

Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) - Jézéquel, Youenn; Mathias, Delphine; Frédéric Olivier; Amice, Erwan; Chauvaud, Sylvain; Jolivet, Aurélie; Bonnel, Julien; Sejr, Mikael K.; Chauvaud, Laurent (Polar Biology, 2022)
The vocal repertoire of walruses has been widely described in the bioacoustic literature. These marine mammals produce several distinct types of vocalizations for intraspecific communication during the breeding season. In this study, we provide the first evidence of walrus-generated sounds during foraging dives when they feed on bivalves. We recorded two types of sounds that we associated to different feeding mechanisms. The first sound type was brief and low in frequency that we relate to the suction of soft parts from the bivalves’ shells through the use of walrus powerful tongues, which is the common feeding behavior reported in the walrus literature. We also recorded a second sound type composed of multiple broadband pulse trains. We hypothesize the latter were associated with bivalve shell cracking by walruses, which would represent a new feeding mechanism in the walrus literature. This new feeding mechanism is either related to bivalves’ ecology or to walruses removing the sediment when searching for food. During this study, we observed bivalves lying on the seafloor instead of being buried in the sediment in walrus feeding areas while scuba diving. As a result, walruses cannot use suction to feed on soft body part of bivalves and have to use another strategy, mastication. Our findings provide a first step towards using passive acoustics to quantify walrus behavior and feeding ecology.
Keywords: Bioacoustics; bivalves; Feeding Behavior; Marine mammal; Young Sound fjord

Phylogeography of the veined squid, Loligo forbesii, in European watersAbstract - Göpel, Anika; Oesterwind, Daniel; Barrett, Christopher; Cannas, Rita; Caparro, Luis Silva; Carbonara, Pierluigi; Donnaloia, Marilena; Follesa, Maria Cristina; Larivain, Angela; Laptikhovsky, Vladimir; Lefkaditou, Evgenia; Jean-Paul Robin; et al. (Scientific Reports, 2022)

A possible strong impact of tidal power plant on silver eels’ migration - Trancart, Thomas; Teichert, Nils; Lamoureux, Jézabel; Gharnit, Elouana; Acou, Anthony; de Oliveira, Eric; Roy, Romain; Feunteun, Eric (Estuarine, Coastal and Shelf Science, 2022)
Very few tidal power plants exist in the world. The first one was built in the Rance estuary (Brittany, France) in 1966 and the second one in South Korea. However, with the increasing demand in renewable energy, other tidal power plant projects are being studied. These power plants are larger than unidirectional fluvial hydropower plants and strongly modify the natural tidal cycle in estuarine systems. As such, their effect on megafaunal movements might strongly differ from those caused by unidirectional fluvial hydropower plants and should be specifically considered and studied before the development of similar constructions. In this study, an acoustic telemetry array was deployed to track 25 silver eels released 16 km upstream of the Rance tidal power dam. Only 1/3 of the tagged eels passed the dam and reached the sea. Data suggested that eels interrupted their migration up to 5 km upstream of the dam. We assume that the noise and tidal disturbance generated by the dam could lead to a disruption of a high proportion of silver eels’ reproductive migration.

Potential combined impacts of climate change and non-indigenous species arrivals on Bay of Biscay trophic network structure and functioning - Le Marchand, M.; Ben Rais Lasram, F.; Araignous, E.; Saint-Béat, B.; Lassalle, G.; Michelet, N.; Serre, S.; Safi, G.; Lejart, M.; Nathalie Niquil; Le Loc'h, F. (Journal of Marine Systems, 2022)

Preventing misuse of high-resolution remote sensing data - Goberville, Eric (Peer Community In Ecology, 2022)
To observe, characterise, identify, understand, predict... This is the approach that researchers follow every day. This sequence is tirelessly repeated as the biological model, the targeted ecosystem and/or the experimental, environmental or modelling conditions change. This way of proceeding is essential in a world of rapid change in response to the frenetic pace of intensifying pressures and forcings that impact ecosystems. To better understand our Earth and the dynamics of its components, to map ecosystems and diversity patterns, and to identify changes, humanity had to demonstrate inventiveness and defy gravity.

Pull the trigger: interplay between benthic and pelagic cues driving the early recruitment of a natural bivalve assemblage - Androuin, Thibault; Barbier, Pierrick; Foret, Martin; Tarik Meziane; Thomas, Mathilde; Archambault, Philippe; Winkler, Gesche; Tremblay, Rejean; Frédéric Olivier (Ecosphere, 2022)
Larval settlement and recruitment are crucial phases in the benthic-pelagic life cycle of marine benthic invertebrates that controls population dynamic and habitat connectivity. Our study investigated potential triggers driving the settlement of bivalve larvae in a highly dynamic intertidal coarse sand habitat. The early recruitment rate of five dominant bivalve families and abiotic conditions, particulate (<20 µm) organic matter and sediment organic matter, were monitored from May to October 2014. Pelagic particulate organic matter (<20 µm) was dominated by picoplankton throughout the sampling period, with a substantial diatom bloom in spring. Sediment was characterized by fresh organic matter in spring, as suggested by the dominant contribution of polyunsaturated fatty acids, and by a higher proportion of bacterial fatty acid markers during late summer. Different dynamics were also observed in early bivalve recruitment rates, with four different patterns observed over the sampling period. Multiple regression analysis on selected bivalve families showed species-specific responses to trophic settlement triggers. Indeed, the larva recruitment rate of Mytilidae paralleled pelagic concentration of picoeucaryotes, with the peak early recruitment rate occurring in spring. Surprisingly, the early recruitment rate of Mactridae larvae showed a significant relation to bacterial concentration in the surficial sediment at the end of summer. While the Mytilidae results in such a eutrophic system confirmed those of a previous study in oligotrophic lagoons, therefore supporting the trophic settlement trigger hypothesis, more work is needed to understand the potential role of bacteria in the early recruitment of Mactridae. These results highlight for the first-time inter-specific differences in trophic cues that potentially trigger primary settlement in natural bivalve assemblages.
Keywords: bacteria; bivalves; Chausey Archipelago; early larval recruitment; fatty acids; picoeucaryotes; trophic settlement trigger

Rare earth elements and yttrium in suspension-feeding bivalves (dog cockle, Glycymeris glycymeris L.): Accumulation, vital effects and pollution - Barrat, Jean-Alix; Chauvaud, Laurent; Frédéric Olivier; Poitevin, Pierre; Bayon, Germain; Ben Salem, Douraied (Geochimica et Cosmochimica Acta, 2022)

The response of microphytobenthos to physical disturbance, herbicide, and titanium dioxide nanoparticle exposure - Rimmer, James E.V.; Cédric Hubas; Wyness, Adam J.; Bruno Jesus; Hartley, Morgan; Blight, Andrew J.; Prins, Antoine; Paterson, David M (Marine Pollution Bulletin, 2022)
The microphytobenthos that form transient biofilms are important primary producers in intertidal, depositional habitats, yet we have only a limited understanding of how they respond to the cumulative impacts of the growing range of anthropogenic stressors to which they are exposed. We know even less about how the temporal alignment of exposure – such as duration and exposure sequence – may affect the response. Estuarine biofilms were cultured in mesocosms and exposed to the herbicide glyphosate and titanium dioxide (TiO2) nanoparticles in different sequences (glyphosate-first or TiO2-first), as well as in the presence and absence of physical disturbance. We found that at environmentally realistic chemical concentrations, the order of exposure was less important than the total stressor scenario in terms of impacts on key functional attributes and diatom community structure. Physical disturbance did not have an impact on functional attributes, regardless of exposure sequence.

The Response of North Sea Ecosystem Functional Groups to Warming and Changes in Fishing - Thorpe, Robert B.; Arroyo, Nina L.; Safi, Georges; Nathalie Niquil; Preciado, Izaskun; Heath, Michael; Pace, Matthew C.; Lynam, Christopher P. (Frontiers in Marine Science, 2022)

A review of methods and indicators used to evaluate the ecological modifications generated by artificial structures on marine ecosystems - Taormina, Bastien; Pascal Claquin; Vivier, Baptiste; Navon, Maxine; Pezy, Jean-Philippe; Raoux, Aurore; Dauvin, Jean-Claude (Journal of Environmental Management, 2022)

Revision of the Genus Rhyacichthys Using Integrative Taxonomy - Haÿ, Vincent; Marion Mennesson; Philippe Keith; Lord, Clara (Pacific Science, 2022)

On the road: Anthropogenic factors drive the invasion risk of a wild solitary bee species - Lanner, Julia; Dubos, Nicolas; Geslin, Benoît; Leroy, Boris; Hernández-Castellano, Carlos; Dubaić, Jovana Bila; Bortolotti, Laura; Calafat, Joan Diaz; Ćetković, Aleksandar; Flaminio, Simone; Le Féon, Violette; Margalef-Marrase, Jordi; et al. (Science of The Total Environment, 2022)

Seascapes of fear and competition shape regional seabird movement ecology - Courbin, Nicolas; Pichegru, Lorien; Seakamela, Mduduzi; Makhado, Azwianewi; Meÿer, Michael; Kotze, Pieter G. H.; Mc Cue, Steven A.; Clara Péron; Grémillet, David (Communications Biology, 2022)

Seasonal and diel modulation of DOM in a mangrove-dominated estuary - Vidal, L.O.; Lambert, T.; Cotovicz Jr., L.C.; Bernardes, M.C.; Sobrinho, R.; Thompson, F.; Garcia, G.D.; Knoppers, B.A.; Gatts, P.V.; Régis, C.R.; Abril, G.; Rezende, C.E. (Science of The Total Environment, 2022)

Seasonal, Diurnal, and Tidal Variations of Dissolved Inorganic Carbon and pCO2 in Surface Waters of a Temperate Coastal Lagoon (Arcachon, SW France) - Polsenaere, Pierre; Delille, Bruno; Poirier, Dominique; Charbonnier, Céline; Deborde, Jonathan; Mouret, Aurélia; Gwenaël Abril (Estuaries and Coasts, 2022)

Seasonal dynamics of marine protist communities in tidally mixed coastal waters - Caracciolo, Mariarita; Rigaut‐Jalabert, Fabienne; Romac, Sarah; Mahé, Frédéric; Forsans, Samuel; Gac, Jean‐Philippe; Arsenieff, Laure; Manno, Maxime; Chaffron, Samuel; Cariou, Thierry; Hoebeke, Mark; Bozec, Yann; et al. (Molecular Ecology, 2022)
Major seasonal community reorganizations and associated biomass variations are landmarks of plankton ecology. However, the processes of plankton community turnover rates have not been fully elucidated so far. Here, we analyse patterns of planktonic protist community succession in temperate latitudes, based on quantitative taxonomic data from both microscopy counts (cells > 10 μm) and ribosomal DNA metabarcoding (size fraction > 3 μm, 18S rRNA gene) from plankton samples collected biweekly over 8 years (2009-2016) at the SOMLIT-Astan station (Roscoff, Western English Channel). Based on morphology, diatoms were clearly the dominating group all year round and over the study period. Metabarcoding uncovered a wider diversity spectrum and revealed the prevalence of Dinophyceae and diatoms but also of Cryptophyta, Chlorophyta, Cercozoa, Syndiniales and Ciliophora in terms of read counts and or richness. The use of morphological and molecular analyses in combination allowed improving the taxonomic resolution and to identify the sequence of the dominant species and OTUs (18S V4 rDNA-derived taxa) that drive annual plankton successions. We detected that some of these dominant OTUs were benthic as a result of the intense tidal mixing typical of the French coasts in the English Channel. Our analysis of the temporal structure of community changes point to a strong seasonality and resilience. The temporal structure of environmental variables (especially Photosynthetic Active Radiation, temperature and macronutrients) and temporal structures generated by species life cycles and or species interactions, are key drivers of the observed cyclic annual plankton turnover.

Similar trait structure and vulnerability in pelagic fish faunas on two remote island systems - Steinberg, Madeline; Juhel, Jean-Baptiste; Marques, Virginie; Clara Péron; Hocdé, Régis; Polanco Fernández, Andréa; Pellissier, Loïc; Villeger, Sebastien; Mouillot, David; Letessier, Tom B. (Marine Biology, 2022)
The link between biodiversity and ecosystem functioning has been the topic of considerable research, but it remains unclear how biodiversity decline is compromising ecosystem functionality, particularly in the pelagic realm. Here, we explore how pelagic fish species diversity relates to functional diversity by sampling two locations, which, on the basis of biogeography, environmental conditions and human pressures, were expected to host pronounced differences in species composition and abundances and therefore functionality. Strings of five drifting mid-water Baited Remote Underwater Video Systems were used to survey pelagic vertebrate diversity and abundance in two isolated oceanic island systems, the Malpelo Fauna and Flora Sanctuary—a large, 25-year-old marine protected area—and an unprotected area in Cape Verde. Functional diversity, which offers insight into a community’s resilience against disturbance, was analysed using six key functional traits of marine fishes. Abundance was recorded as MaxN, the maximum number of individuals of a given species in a single frame during the 2-h deployment time. Cape Verde showed high overall abundance (Total MaxN 873) and low biomass (3559 kg), with a predominance of smaller fishes. Malpelo showed high biomass (7839 kg) but lower abundance (Total MaxN 465), with a predominance of large species. Species and functional diversity were marginally different between locations. Multivariate analysis of species relative abundances showed significant divergence between locations, although community functional traits overlapped strongly, suggesting that both communities share a similar structure and vulnerability. The existence of a common functional ‘backbone’ in diverging species communities across the oceans, under different productivity regimes, and under different protection levels, suggests that although pelagic communities may differ considerably in terms of species composition, this does not translate into a differing functional structure and resilience potential. Whether this vulnerability is a common feature of pelagic communities and how this contrasts with benthic systems warrants further research.

Spatialized ecological network analysis for ecosystem-based management: effects of climate change, marine renewable energy, and fishing on ecosystem functioning in the Bay of SeineAbstract - Nogues, Quentin; Araignous, Emma; Bourdaud, Pierre; Halouani, Ghassen; Raoux, Aurore; Foucher, Eric; Loc'h, François Le; Loew-Turbout, Frédérique; Ben Rais Lasram, Frida; Dauvin, Jean-Claude; Nathalie Niquil (ICES Journal of Marine Science, 2022)

Spatially explicit food web modelling to consider fisheries impacts and ecosystem representation within Marine Protected Areas on the Kerguelen PlateauAbstract - Subramaniam, Roshni C; Corney, Stuart P; Melbourne-Thomas, Jessica; Clara Péron; Ziegler, Philippe; Swadling, Kerrie M (ICES Journal of Marine Science, 2022)

Spatio-temporal patterns in stable isotope composition of a benthic intertidal food web reveal limited influence from salt marsh vegetation and green tide - Sturbois, A.; Riera, P.; Desroy, N.; Brébant, T.; Alexandre Carpentier; Ponsero, A.; Schaal, G. (Marine Environmental Research, 2022)

SPREADING EUTROPHICATION AND CHANGING CO2 FLUXES IN THE TROPICAL COASTAL OCEAN: A FEW LESSONS FROM RIO DE JANEIRO - Gwenaël Abril; C. Cotovicz Jr., Luiz; Nepomuceno, Aguinaldo; Erbas, Thaís; Costa, Suzan; V. Ramos, Vinicius; Moser, Gleyci; Fernandes, Alexandre; Negri, Eduardo; A. Knoppers, Bastiaan; Brandini, Nilva; Machado, Wilson; et al. (Arquivos de Ciências do Mar, 2022)

Stable Isotope Trajectory Analysis ( SITA ): A new approach to quantify and visualize dynamics in stable isotope studies - Sturbois, Anthony; Cucherousset, Julien; De Cáceres, Miquel; Desroy, Nicolas; Riera, Pascal; Alexandre Carpentier; Quillien, Nolwenn; Grall, Jacques; Espinasse, Boris; Cherel, Yves; Schaal, Gauthier (Ecological Monographs, 2022)

Stomach content and stable isotope analyses provide complementary insights into the trophic ecology of coastal temperate bentho-demersal assemblages under environmental and anthropogenic pressures - Sturbois, A.; Cozic, A.; Schaal, G.; Desroy, N.; Riera, P.; Le Pape, O.; Le Mao, P.; Ponsero, A.; Alexandre Carpentier (Marine Environmental Research, 2022)

Structural and Functional Characterization of Orcokinin B-like Neuropeptides in the Cuttlefish (Sepia officinalis) - Endress, Maxime; Céline Zatylny-Gaudin; Leprince, Jérôme; Lefranc, Benjamin; Corre, Erwan; Le Corguillé, Gildas; Bernay, Benoît; Leduc, Alexandre; Rangama, Jimmy; Mouret, Liza; Lafont, Anne-Gaelle; Bondon, Arnaud; et al. (Marine Drugs, 2022)

Tachykinins, new players in the control of reproduction and food intake: A comparative review in mammals and teleosts - Campo, Aurora; Sylvie Dufour; Rousseau, Karine (Frontiers in Endocrinology, 2022)

Temporal characteristics of plankton indicators in coastal waters: High-frequency data from PlanktonScope - Bi, Hongsheng; Song, Junting; Zhao, Jian; Liu, Hui; Cheng, Xuemin; Wang, Linlin; Cai, Zhonghua; Benfield, Mark C.; Otto, Saskia; Goberville, Eric; Keister, Julie; Yang, Yong; et al. (Journal of Sea Research, 2022)
Plankton are excellent indicators of ecosystem status and fisheries because of their pivotal role in marine food webs and their core values in the integrated ecosystem assessment (IEA). Monitoring plankton is essential to understand their dynamics and underlying processes. Recent advances in imaging technologies have enabled in situ, high-frequency, real-time observations of plankton in coastal waters. While high-frequency plankton time series have provided unprecedented fundamental information about physical and biological processes, understanding and identifying the underlying mechanisms that influence plankton dynamic remains a major challenge. We use high-frequency plankton data from PlanktonScope as an example to examine the impacts of physical and biological processes on plankton dynamics at different temporal scales. Frequency patterns were identified for both environmental factors and different plankton groups that matched in time. Using logistic regression models on the selected daily peaks for different plankton groups, we found that diurnal cycle, monsoon season, and major episodic events, such as typhoons, had major impacts on the dynamics of plankton, as proxied by our indicators. We further synthesized, across multiple spatiotemporal scales in the study area, the impacts of various processes on plankton with different mobility. Our study demonstrates that the suite of plankton indicators simultaneously generated from PlanktonScope provides a robust holistic view of pelagic ecosystem status over a broad range of spatiotemporal scales. In situ imaging systems like PlanktonScope are promising tools for near real-time plankton monitoring and a deep understanding of plankton dynamics.

Temporal variations in the level of chlordecone in seawater and marine organisms in Martinique Island (Lesser Antilles) - Charlotte R. Dromard; Allénou, Jean-Pierre; Tapie, Nathalie; Budzinski, Hélène; Cimmaterra, Nicolas; De Rock, Pauline; Arkam, Salim; Cordonnier, Sébastien; Gonzalez, Jean-Louis; Bouchon-Navaro, Yolande; Bouchon, Claude; Thouard, Emmanuel (Environmental Science and Pollution Research, 2022)
The present study, conducted in the Galion Bay in Martinique, aims to highlight the temporal and seasonal variations of chlordecone contamination (an organochlorine pollutant) in the ambient environment (seawater) but also in the marine organisms in three main coastal marine habitats (mangroves, seagrass beds and coral reefs). To this end, two methodologies were used to measure and compare the chemical contamination of seawater during 13 months (spot samplings and POCIS technique). In parallel, concentrations of chlordecone and isotopic ratios (C and N) were carried out on marine organisms, collected during two contrasting climatic periods (dry and rainy), to evidence seasonal variations. The results showed that the contamination of seawater displayed significant variations over time and depended on environmental factors such as water flows, which imply dilution and dispersion phenomena. Concerning the marine organisms, the level of contamination varied considerably between the two seasons in seagrass beds with higher levels of contamination during the rainy season. Reef organisms were more moderately affected by this pollution, while mangrove organisms showed a high level of chlordecone whatever the season. Finally, isotope analyses highlighted that bioamplification along marine food-webs occurs at each season and each station.
Keywords: coral reef; Mangrove; organochlorine pollution; passive samplers; seagrass; Stable isotopes

Transient Receptor Potential-Vanilloid (TRPV1-TRPV4) Channels in the Atlantic Salmon, Salmo salar. A Focus on the Pineal Gland and Melatonin Production - Nisembaum, Laura Gabriela; Loentgen, Guillaume; L'Honoré, Thibault; Martin, Patrick; Paulin, Charles-Hubert; Fuentès, Michael; Escoubeyrou, Karine; Delgado, Maria Jesus; Besseau, Laurence; Falcón, Jack (Frontiers in Physiology, 2022)
Fish are ectotherm, which rely on the external temperature to regulate their internal body temperature, although some may perform partial endothermy. Together with photoperiod, temperature oscillations, contribute to synchronizing the daily and seasonal variations of fish metabolism, physiology and behavior. Recent studies are shedding light on the mechanisms of temperature sensing and behavioral thermoregulation in fish. In particular, the role of some members of the transient receptor potential channels (TRP) is being gradually unraveled. The present study in the migratory Atlantic salmon, Salmo salar, aims at identifying the tissue distribution and abundance in mRNA corresponding to the TRP of the vanilloid subfamilies, TRPV1 and TRPV4, and at characterizing their putative role in the control of the temperature-dependent modulation of melatonin production—the time-keeping hormone—by the pineal gland. In Salmo salar, TRPV1 and TRPV4 mRNA tissue distribution appeared ubiquitous; mRNA abundance varied as a function of the month investigated. In situ hybridization and immunohistochemistry indicated specific labeling located in the photoreceptor cells of the pineal gland and the retina. Additionally, TRPV analogs modulated the production of melatonin by isolated pineal glands in culture. The TRPV1 agonist induced an inhibitory response at high concentrations, while evoking a bell-shaped response (stimulatory at low, and inhibitory at high, concentrations) when added with an antagonist. The TRPV4 agonist was stimulatory at the highest concentration used. Altogether, the present results agree with the known widespread distribution and role of TRPV1 and TRPV4 channels, and with published data on trout (Oncorhynchus mykiss), leading to suggest these channels mediate the effects of temperature on S. salar pineal melatonin production. We discuss their involvement in controlling the timing of daily and seasonal events in this migratory species, in the context of an increasing warming of water temperatures.
Keywords: Atlantic salmon; melatonin; pineal organ; Temperature; transient receptor potential vanilloid (TRPV); TRPV1; TRPV4

West Side Story: A molecular and morphological study of Caridina longicarpus Roux, 1926 (Decapoda, Caridea, Atyidae) from New Caledonia reveals a new species - de Mazancourt, Valentin; Bréthiot, Julien; Marquet, Gérard; Keith, Philippe (Zoosystema, 2022)
Numerous specimens of freshwater shrimps identified as Caridina longicarpus Roux, 1926 were recently collected from New Caledonia. Following an integrative taxonomy approach, they were morphologi- cally and genetically studied. Results of a 16S mtDNA analysis showed that the specimens initially identified as C. longicarpus were distributed in two geographically structured clades. Morphological study showed that the shrimps found in rivers draining to the east coast of the island belonged to C. longicarpus sensu stricto, whereas those from rivers draining to the west coast belonged to a new species, here described as Caridina occidentalis n. sp. Detailed redescription of C. longicarpus is pro- vided and a lectotype is designated. The existence of both species in allopatry could be explained by local biogeographical factors such as the topography of the island or oceanic circulation impacting the dispersal of larvae during the planktonic stage.

West Side Story: A molecular and morphological study of Caridina longicarpus Roux, 1926 (Decapoda, Caridea, Atyidae) from New Caledonia reveals a new species - Mazancourt, Valentin de; Bréthiot, Julien; Marquet, Gérard; Philippe Keith (Zoosystema, 2022)

Analysis of trophic networks: an optimisation approach - Caputo, Jean-Guy; Girardin, Valerie; Knippel, Arnaud; Nguyen, Minh Hieu; Nathalie Niquil; Nogues, Quentin (Journal of Mathematical Biology, 2021)

Annual phytoplankton succession results from niche-environment interactionAbstract - Caracciolo, Mariarita; Grégory Beaugrand; Pierre Hélaouët; Gevaert, Francois; Martin Edwards; Lizon, Fabrice; Kléparski, Loïck; Goberville, Eric (Journal of Plankton Research, 2021)
Annual plankton succession has been investigated for many decades with hypotheses ranging from abiotic to biotic mechanisms being proposed to explain these recurrent patterns. Here, using data collected by the Continuous Plankton Recorder (CPR) survey and models originating from the MacroEcological Theory on the Arrangement of Life, we investigate Annual Phytoplankton Succession (APS) in the North Sea at a species level. Our results show that this phenomenon can be predicted well by models combining photosynthetically active radiation, temperature and macro-nutrients. Our findings suggest that APS originates from the interaction between species’ ecological niches and the annual environmental fluctuations at a community level. We discuss our results in the context of traditional hypotheses formulated to explain this recurrent pattern in the marine field.