%0 Journal Article %J Marine Pollution Bulletin %D 2024 %T Trace element variations in mussels' shells from continent to sea: The St. Lawrence system, Canada %A Guillot, Alice %A Barrat, Jean-Alix %A Olivier, Frédéric %A Tremblay, Rejean %A Saint-Louis, Richard %A Rouget, Marie-Laure %A Ben Salem, Douraied %K Rare earth elements Trace elements Estuary Bivalve Shell Environmental proxy Pollution %X 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. %B Marine Pollution Bulletin %V 199 %P 116034 %8 Jan-02-2024 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0025326X24000110 %! Marine Pollution Bulletin %R 10.1016/j.marpolbul.2024.116034 %0 Journal Article %J Aquat Toxicol %D 2023 %T Aluminium-based galvanic anode impacts the photosynthesis of microphytobenthos and supports the bioaccumulation of metals released. %A Levallois, Alexandre %A Vivier, Baptiste %A Caplat, Christelle %A Goux, Didier %A Orvain, Francis %A Lebel, Jean-Marc %A Claquin, Pascal %A Chasselin, Léo %A Basuyaux, Olivier %A Serpentini, Antoine %K Aluminum %K Bioaccumulation %K Ecosystem %K Electrodes %K Photosynthesis %K Water Pollutants, Chemical %K Zinc %X
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.
%B Aquat Toxicol %V 258 %P 106501 %8 2023 May %G eng %R 10.1016/j.aquatox.2023.106501 %0 Journal Article %J Limnology and Oceanography: Methods %D 2023 %T Assessing the impacts of anthropogenic sounds on early stages of benthic invertebrates: The 'Larvosonic system'. %A Olivier, Frédéric %A Gigot, Mathilde %A Mathias, Delphine %A Jézéquel, Youenn %A Meziane, Tarik %A L'Her, Christophe %A Chauvaud, Laurent %A Bonnel, Julien %X 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."Arctic benthic ecosystems are expected to experience strong modifications in the dynamics of primary producers and/or benthic-pelagic coupling under climate change. However, lack of knowledge about the influence of physical constraints (e.g. ice-melting associated gradients) on organic matter sources, quality, and transfers in systems such as fjords can impede predictions of the evolution of benthic-pelagic coupling in response to global warming. Here, sources and quality of particulate organic matter (POM) and sedimentary organic matter (SOM) were characterized along an inner-outer gradient in a High Artic fjord (Young Sound, NE Greenland) exposed to extreme seasonal and physical constraints (ice-melting associated gradients). The influence of the seasonal variability of food sources on 2 dominant filter-feeding bivalves (Astarte moerchi and Mya truncata) was also investigated. Results revealed the critical impact of long sea ice/snow cover conditions prevailing in Young Sound corresponding to a period of extremely poor and degraded POM and SOM. Freshwater inputs had a very local impact during summer, with relatively more degraded POM at the surface compared to bottom waters that were less nutritionally depleted but more heterogeneous among the sampled stations. Terrestrial inputs contributed to the SOM composition but showed a large variability along the fjord. Finally, diet analyses underlined the contrasted nutritional conditions, showing much higher lipid reserves in A. moerchi than in M. truncata during winter. Under a scenario with increased freshwater input, such results suggest a decline in organic matter quality and production in Young Sound, with subsequent impacts on benthic food webs.
%B Marine Ecology Progress Series %V 610 %P 15-31 %G eng %U https://www.int-res.com/abstracts/meps/v610/p15-31/ %R 10.3354/meps12857 %0 Journal Article %J Deep Sea Research Part II: Tropical Studies in Oceanography %D 2019 %T Contrasting biodiversity of eel larvae across the central Indian Ocean subtropical gyre %A Miller, Michael J %A Wouthuyzen, Sam %A Eric Feunteun %A Aoyama, Jun %A Watanabe, Shun %A Syahailatua, Augy %A Kuroki, Mari %A Robinet, Tony %A Hagihara, Seishi %A Otake, Tsuguo %A others %X The unique semi-enclosed Indian Ocean basin includes large Mascarene Plateau banks, offshore coral-reef islands, seasonal equatorial current jets, and cross-basin westward South Equatorial Current (SEC) flow, making it interesting for studying long larval-duration eel larvae (leptocephali) and regional eel biodiversity. Three surveys for leptocephali (in 2003, 2006, 2010) included sampling west of the Mascarene Plateau (west), a major survey and other stations off Sumatra and Java (east), and 2 cross-basin transects across the SEC. The highest numbers of leptocephali species were observed along Sumatra (2003: ~143 species; 2006: 72 species) and south of Java (2010: 69), with intermediate numbers being collected in the western Indian Ocean (2006: 71; 2010: 53) compared to low numbers in the hydrographically variable offshore zones (2006, 2010: 3–27). The larger continental shelf areas along Sumatra including the Mentawai Islands provide more coral reef and other habitats for species such as congrid, muraenid, ophichthid, and chlopsid eels compared to the Mascarene Plateau banks. Some larvae in these areas get transported offshore, but the majority of offshore larvae were of Nemichthyidae and Serrivomeridae mesopelagic eels that were spawning across the basin. Habitat differences between the southern Mascarene Plateau and Sumatra and southern Indonesia along the edge of the high biodiversity Coral Triangle likely explain the higher biodiversity of eel larvae observed along the western side of the basin, which for the Congridae and Ophichthidae included more species than observed previously within the central Indonesian Seas. In addition to local spawning, seasonal currents likely transport larger larvae towards Sumatra from the north or west and larvae may enter the basin from the Indonesian Throughflow in the east, but it is unknown if equatorial jets or the SEC can transport larvae across the whole basin. %B Deep Sea Research Part II: Tropical Studies in Oceanography %V 161 %P 120–131 %G eng %U https://www.sciencedirect.com/science/article/pii/S0967064517304393 %R doi.org/10.1016/j.dsr2.2018.02.012 %0 Journal Article %J Progress in Oceanography %D 2019 %T Distribution of anguillid leptocephali and possible spawning areas in the South Pacific Ocean %A Mari Kuroki %A Michael J. Miller %A Eric Feunteun %A Pierre Sasal %A Timothy Pikering %A Yu-San Han %A Elisabeth Faliex %A Anthony Acou %A Aurélie Dessier %A Robert Schabetsberger %A Shun Watanabe %A Tatsuya Kawakami %A Hiroaki Onda %A Takatoshi Higuchi %A Aya Takeuchi %A Madoka Shimizu %A Chinthaka A. Hewavitharane %A Seishi Hagihara %A Terumasa Taka %A Shingo Kimura %A Noritaka Mochioka %A Tsuguo Otake %A Katsumi Tsukamoto %K Early life history %K Freshwater eels %K Migration %K otolith %K South Pacific %K Spawning %X Seven South Pacific anguillid eel species live from New Guinea to French Polynesia, but their spawning areas and life histories are mostly unknown despite previous sampling surveys. A July–October 2016 research cruise was conducted to study the spawning areas and times, and larval distributions of South Pacific anguillid eels, which included a short 155°E station-line northeast of New Guinea and five long transects (5–25°S, 160°E–140°W) crossing the South Equatorial (SEC) and other currents. This survey collected nearly 4000 anguilliform leptocephali at 179 stations using an Isaacs-Kidd Midwater Trawl accompanied by 104 CTD casts. Based on morphometric observations and DNA sequencing, 74 anguillid leptocephali were collected, which in the southern areas included 29 larvae of six species: Anguilla bicolor pacifica, A. marmorata, A. australis, A. reinhardtii, A. megastoma,and A. obscura (all anguillid species of the region were caught except A. dieffenbachii). Small A. australis (9.0–16.8 mm) and A. reinhardtii (12.4, 12.5 mm) leptocephali were collected south of the Solomon Islands, other A. australis (10.8–12.0 mm) larvae were caught northwest of Fiji along with an A. obscura (20.0 mm) larva, and an A. marmorata (7.8 mm) larva was collected near Samoa. Considering collection sites, larval ages from otolith analysis, and westward SEC drift, multiple spawning locations occurred from south of the Solomon Islands and the Fiji area (16–20 days old larvae) to near Samoa (19 days old larva) during June and July in areas where high-salinity Subtropical Underwater (STUW, 150 m depth) and the warm, low-salinity surface Fresh Pool were present. Five long hydrographic sections showed the strong Fresh Pool in the west and the STUW formation area in the east. %B Progress in Oceanography %V 180 %P 102234 %G eng %U http://www.sciencedirect.com/science/article/pii/S0079661119304148 %R https://doi.org/10.1016/j.pocean.2019.102234 %0 Journal Article %J Movement Ecology %D 2019 %T Exploration during early life: distribution, habitat and orientation preferences in juvenile king penguins %A Orgeret, F. %A Clara Péron %A Enstipp, M. R. %A Delord, K. %A Weimerskirch, H. %A Bost, C. A. %X BackgroundArtificial reefs (ARs) are deployed worldwide as they are expected to support fisheries management. While the underlying mechanisms remain widely debated, production was recently determined as the most probable cause of increases in fish biomass. Changes in fish biomass in a temperate AR system were investigated from December 2008 to November 2015 by considering seven distinct functional groups, and isotopic functional indices were used to identify how these changes may have affected organic matter (OM) fluxes. Contrasting patterns of change were observed between functional trophic groups, highlighting that combining the biomass of all species present in a community is inappropriate for assessing AR-induced effects. Benthic sedentary species predominated (>75% of the total biomass) through massive production, with a 68-fold increase in mean biomass over the study period. Mobile species tended to vary seasonally, suggesting only a slight influence of AR. Zooplanktivores biomass decreased over the 6-year period, as a possible result of changes in environmental conditions. Isotopic indices helped to reveal both the community maturation and the importance of local OM sources not only in supporting fish biomass production but also in attracting pelagic species. Our results corroborate that production and attraction are two extremes of a range of contrasting patterns and highlight the importance of considering the specific responses of functional components of fish communities to accurately describe changes in AR functioning. Functional attributes such as trophic traits, habitat use and dispersal abilities must not be overlooked as they modulate fish species responses to the deployment of man-made rocky substrates.
%B Marine Environmental Research %V 145 %P 137-146 %G eng %U http://www.sciencedirect.com/science/article/pii/S0141113618307979 %R https://doi.org/10.1016/j.marenvres.2019.02.018 %0 Journal Article %J Journal of Biogeography %D 2019 %T Global biogeographical regions of freshwater fish species %A Leroy, Boris %A Dias, Murilo S. %A Giraud, Emilien %A Hugueny, Bernard %A Jézéquel, Céline %A Leprieur, Fabien %A Oberdorff, Thierry %A Pablo Tedesco %B Journal of Biogeography %V 46 %P 2407 - 2419 %8 Jun-11-2019 %G eng %U https://onlinelibrary.wiley.com/doi/abs/10.1111/jbi.13674 %N 11 %! J Biogeogr %R 10.1111/jbi.13674 %0 Journal Article %J Marine Environmental Research %D 2019 %T Modelling the functioning of a coupled microphytobenthic-EPS-bacterial system in intertidal mudflats %A Rakotomalala, C %A Katell Guizien %A Karine Grangeré %A Sébastien Lefebvre %A Christine Dupuy %A Francis Orvain %K Bacillariophyta %K bacteria %K Bacteria (microorganisms) %K bacterial growth %K bacterium %K Biogeochemical modeling %K biogeochemistry %K Biomass %K Carbon %K Carbon and nitrogen %K Carbon and nitrogen ratios %K Diatom %K diel vertical migration %K exopolymer %K Experimental conditions %K Extracellular polymeric substances %K intertidal environment %K intertidal zone %K light %K mesocosm %K microbial community %K Microphytobenthos %K Migration %K modeling %K mudflat %K Nitrogen %K nonhuman %K Nutrient availability %K Nutrients %K nutritional requirement %K organic carbon %K organismal interaction %K Photosynthesis %K Phytobenthos %K Phytoplankton %K polymer %K Review %K simulation %K tide %K vertical migration %X A mechanistic and biogeochemical model was developed to analyze the interactions between microphytobenthos (MPB), bacteria and nutrients in a tidal system. Behavioral vertical migration was hypothesized as being controlled by exogenous factors (tide and light) but also by endogenous factors (carbon and nitrogen requirements). The secretion of Extracellular Polymeric Substances (EPS) during photosynthesis (overflow metabolism) and migration of diatoms was also formulated. Similarities in MPB dynamics between observations and simulations support the assumption that carbon and nitrogen ratios are additional key processes behind the vertical migration of diatoms in the sediment. The model satisfactorily reproduced the three growth phases of the MPB development observed in a mesocosm (the lag phase, the logarithmic growth, and the plateau). Besides, nutrient availability, which could be induced by faunal bioturbation, significantly determined the extent of MPB biomass and development. The plateau phase observed in the last days of simulations appeared to be attributed to a nutrient depletion in the system, emphasizing the importance of nutrient availability. The model, although improvable especially on the formulation of the EPS excretion and bacteria development, already updated understanding of several aspects of benthic-system functioning during experimental conditions. © 2019 Elsevier Ltd %B Marine Environmental Research %V 150 %G eng %U https://www.sciencedirect.com/science/article/abs/pii/S0141113619300704 %R 10.1016/j.marenvres.2019.104754 %0 Journal Article %J Biological Reviews %D 2019 %T The phylogenetic origin and evolution of acellular bone in teleost fishes: insights into osteocyte function in bone metabolism %A Davesne, Donald %A François J Meunier %A Schmitt, Armin D. %A Friedman, Matt %A Otero, Olga %A Benson, Roger B. J. %K acellular bone %K Actinopterygii %K ancestral state reconstruction %K anosteocytic bone %K bone remodelling %K endothermy %K osteocyte %K Salmoniformes %K Scombridae %K teleostei %XABSTRACT Vertebrate bone is composed of three main cell types: osteoblasts, osteoclasts and osteocytes, the latter being by far the most numerous. Osteocytes are thought to play a fundamental role in bone physiology and homeostasis, however they are entirely absent in most extant species of teleosts, a group that comprises the vast majority of bony ‘fishes’, and approximately half of vertebrates. Understanding how this acellular (anosteocytic) bone appeared and was maintained in such an important vertebrate group has important implications for our understanding of the function and evolution of osteocytes. Nevertheless, although it is clear that cellular bone is ancestral for teleosts, it has not been clear in which specific subgroup the osteocytes were lost. This review aims to clarify the phylogenetic distribution of cellular and acellular bone in teleosts, to identify its precise origin, reversals to cellularity, and their implications. We surveyed the bone type for more than 600 fossil and extant ray-finned fish species and optimised the results on recent large-scale molecular phylogenetic trees, estimating ancestral states. We find that acellular bone is a probable synapomorphy of Euteleostei, a group uniting approximately two-thirds of teleost species. We also confirm homoplasy in these traits: acellular bone occurs in some non-euteleosts (although rarely), and cellular bone was reacquired several times independently within euteleosts, in salmons and relatives, tunas and the opah (Lampris sp.). The occurrence of peculiar ecological (e.g. anadromous migration) and physiological (e.g. red-muscle endothermy) strategies in these lineages might explain the reacquisition of osteocytes. Our review supports that the main contribution of osteocytes in teleost bone is to mineral homeostasis (via osteocytic osteolysis) and not to strain detection or bone remodelling, helping to clarify their role in bone physiology.
%B Biological Reviews %G eng %U https://onlinelibrary.wiley.com/doi/abs/10.1111/brv.12505 %R 10.1111/brv.12505 %0 Journal Article %J Nature Climate Change %D 2019 %T Prediction of unprecedented biological shifts in the global ocean %A Grégory Beaugrand %A Alessandra Conversi %A Angus Atkinson %A Jim E. Cloern %A Sanae Chiba %A Serena Fonda-Umani %A Richard R Kirby %A Greene, C. H. %A Goberville, Eric %A Otto, S. A. %A Philip Chris Reid %A Stemmann, L. %A Martin Edwards %XImpermanence is an ecological principle1 but there are times when changes occur nonlinearly as abrupt community shifts (ACSs) that transform the ecosystem state and the goods and services it provides2. Here, we present a model based on niche theory3 to explain and predict ACSs at the global scale. We test our model using 14 multi-decadal time series of marine metazoans from zooplankton to fish, spanning all latitudes and the shelf to the open ocean. Predicted and observed fluctuations correspond, with both identifying ACSs at the end of the 1980s4,5,6,7 and 1990s5,8. We show that these ACSs coincide with changes in climate that alter local thermal regimes, which in turn interact with the thermal niche of species to trigger long-term and sometimes abrupt shifts at the community level. A large-scale ACS is predicted after 2014—unprecedented in magnitude and extent—coinciding with a strong El Niño event and major shifts in Northern Hemisphere climate. Our results underline the sensitivity of the Arctic Ocean, where unprecedented melting may reorganize biological communities5,9, and suggest an increase in the size and consequences of ACS events in a warming world.
%B Nature Climate Change %V 9 %P 237–243 %8 mar %G eng %U http://www.nature.com/articles/s41558-019-0420-1 %R 10.1038/s41558-019-0420-1 %0 Journal Article %J Estuaries and Coasts %D 2018 %T Annual Phytoplankton Primary Production Estimation in a Temperate Estuary by Coupling PAM and Carbon Incorporation Methods %A Morelle, Jérôme %A Mathilde Schapira %A Francis Orvain %A Riou, Philippe %A Pascal Jean Lopez %A Duplessix, Olivier %A Rabiller, Emilie %A Maheux, Franc %A Simon, Benjamin %A Pascal Claquin %K High frequency . Electron requirement for carbon fixation . Electron transport rate (ETR) . Seine estuary %XPhytoplankton primary production varies considerably with environmental parameters especially in dynamic ecosystems like estuaries. The aimof this study was to investigate short-term primary production along the salinity gradient of a temperate estuary over the course of 1 year. The combination of carbon incorporation and fluorescence methods enabled primary production estimation at short spatial and temporal scales. The electron requirement for carbon fixation was investigated in relation with physical-chemical parameters to accurately estimate primary production at high frequency. These results combined with the variability of the photic layer allowed the annual estimation of primary production along the estuary. Phytoplankton dynamics was closely related to salinity and turbidity gradients, which strongly influenced cells physiology and photoacclimatation. The number of electrons required to fix 1 mol of carbon (C) was ranged between 1.6 and 25 mol electron mol C−1 with a mean annual value of 8 ± 5 mol electron mol C−1. This optimum value suggests that in nutrient replete conditions like estuaries, alternative electron flows are low, while electrons transfer from photosystem II to carbon fixation is highly efficient. A statistical model was used to improve the estimation of primary production from electron transport rate as a function of significant environmental parameters. Based on this model, daily carbon production in the Seine estuary (France) was estimated by considering light and photic zone variability. A mean annual daily primary production of 0.12 ± 0.18 g C m−2 day−1 with a maximum of 1.18 g C m−2 day−1 in summer was estimated which lead to an annual mean of 64.75 g C m−2 year−1. This approach should be applied more frequently in dynamic ecosystems such as estuaries or coastal waters to accurately estimate primary production in those valuable ecosystems.
%B Estuaries and Coasts %8 02/2018 %G eng %0 Journal Article %J Aquatic Living Resources %D 2018 %T Cultured eastern oysters (Crassostrea virginica): retention and assimilation of picophytoplankton using a multi-biomarker approach %A Rémi Sonier %A Réjean Tremblay %A Frédéric Olivier %A Tarik Meziane %A Comeau, Luc Andre %K Aquaculture %K fatty acids %K Picophytoplankton %K Shellfish} %K Stable isotopes %K {Crassostrea virginica %X{In this study, we investigated the food sources of eastern oysters Crassostrea virginica cultivated in Atlantic Canada. Stable isotopes (C-13 and N-15) and fatty acid biomarkers were used to identify these sources under in situ conditions for suspended (similar to 0.5 m below surface) and bottom(similar to 2 m) culture stocks. It was found that particulate organic matter represented the main food source, with major contributions from live phytoplankton. Higher lipid contents were detected in the digestive glands of suspended oysters compared to bottom oysters (p < 0.05). Bottom oysters did not show significant preference for detrital or bacterial organic matter. Near-surface waters contained an elevated picophytoplankton biomass (PPP, 0.2-2 mu m, 1.93 +/- 0.16mg l(-1), mean +/- SEM) compared to nanophytoplankton biomass (NPP, > 2 mu m, 1.05 +/- 0.15 mu g l(-1), mean +/- SEM). To determine whether the small size PPP was captured and assimilated by C. virginica, feeding trials were conducted in the laboratory using three PPP/NPP diets (20%, 50%, and 80% PPP), consisting of isotopically-labelled (delta C-13) PPP cells (Nannochloropsis oculata) and non-labelled NPP cells (Tisochrysis lutea). An isotopically-labelled fatty acids analysis indicated PPP assimilation in various tissues (digestive gland, gills, mantle, and abductor muscle), including from oysters fed the reduced (20%) PPP diet. Isotopic enrichment (C-13) in the FA 22:2 (non-methylene-interrupted or NMI) showed that precursors of NMIs utilized PPP carbon in its biosynthesis process. In conclusion, C. virginica assimilated primarily particulate organic matter (POM), including PPP, which dominated the phytoplankton community in near surface waters. C. virginica can exploit PPP carbon during fatty acid production and further biosynthesis.}
%B Aquatic Living Resources %V 30 %8 08/2018 %G eng %9 Article %R {10.1051/alr/2017031} %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2018 %T Dynamics of exopolymeric carbon pools in relation with phytoplankton succession along the salinity gradient of a temperate estuary (France) %A Morelle, Jérôme %A Mathilde Schapira %A Françoise, Sylvaine %A Courtay Gaëlle %A Francis Orvain %A Pascal Claquin %K Exopolymeric substances Species %K Nanophytoplankton %K Picophytoplankton %K richness %XIn parallel to phytoplankton community dynamics, transparent exopolymeric particles (TEP) and exopolymeric
substances (EPS) were investigated along the salinity gradient of a temperate estuary (Seine estuary, Normandy,
France) over the course of a year. The phytoplankton community was mainly dominated by marine diatom
species (especially Skeletonema sp., Nitzschia sp., and Paralia sulcata) associated with a spring bloom of picoeukaryotes
and the development of Cryptophyceae in summer. The decreases in species richness and salinity were
correlated along the estuary and a significant exponential relationship between species richness and primary
production was identified. Concentrations of TEP and EPS (soluble and bound carbohydrates) are highly dynamic
in this estuary and can reach respectively 69 mgC L−1, and 33 mgC L−1. TEP distribution was mainly
related to physical factors (hydrodynamics, maximum turbidity zone formation and sediment resuspension)
probably produced by stressed or dying phytoplankton, while EPS appeared to be excreted during the phytoplankton
spring bloom. Soluble and bound EPS appear to be related to Skeletonema sp. and Cryptophyceae occurrences.
This paper presents the dynamic pattern of these carbon pools, which play an important role in the
trophic network and influence the flocculation processes involved in the fate of both organic and inorganic
matter.
Winter flounder (Pseudopleuronectes americanus) is a benthic flatfish that is economically important for recreational and commercial fishing in North America. In the last twenty years, the species has undergone a drastic decline, mainly due to anthropic influence. The goal of this study was to gain knowledge on habitat preferences and behavior of juvenile winter flounder to improve the management of natural stocks and optimize release sites of juveniles produced for stock enhancement. Three abiotic factors (sediment, current, and salinity) potentially influencing the distribution of flatfish species were tested in a recircurlating flume with juvenile winter flounder. Time budgets of observed behaviors including swimming, orientation, and burying capacity were analyzed. Sediment texture was the only factor that significantly influenced the burying behavior of winter flounder juveniles; shear velocity, salinity, and sediment had no effect on the orientation of juveniles.
%B Environmental Biology of Fishes %P 1-10 %8 07/2018 %G eng %U https://link.springer.com/article/10.1007%2Fs10641-018-0793-4 %R https://doi.org/10.1007/s10641-018-0793-4 %0 Journal Article %J Cybium %D 2018 %T Histological study of the jaw teeth in the Devonian actinopterygian †Cheirolepis canadensis (Whiteaves) %A Meunier, Francois J. %A Otero, Olga %A Laurin, Michel %B Cybium %V 42 %P 067-074 %G eng %U http://sfi-cybium.fr/fr/histological-study-jaw-teeth-devonian-actinopterygian-†cheirolepis-canadensis-whiteaves %N 1 %R 10.26028/cybium/2018-421-005 %0 Journal Article %J Cybium %D 2018 %T A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha) %A Meunier, Francois J. %A Germain, Damien %A Otero, Olga %B Cybium %V 42 %P 087-090 %G eng %U http://sfi-cybium.fr/fr/histological-study-lingual-molariform-teeth-hyperopisus-bebe-mormyridae-osteoglossomorpha %N 1 %R 10.26028/cybium/2018-421-008 %0 Journal Article %J Biology Letters %D 2018 %T Histology of the endothermic opah (Lampris sp.) suggests a new structure function relationship in teleost fish bone %A Davesne, Donald %A Meunier, Francois J. %A Friedman, Matt %A Benson, Roger B. J. %A Otero, Olga %XEndothermy, production and retention of heat by the body, appeared convergently in mammals, birds and four spiny-rayed teleost fish lineages. Of these, red-muscle endothermy over most or all of the body has only appeared in two groups: tunas and the opah (Lampris). Hitherto, tunas have been the only spiny-rayed fishes known to have bones containing embedded osteocyte cells; others have acellular bone. We examined bone histology in Lampris for the first time, demonstrating the presence of cellular bone very similar to that of tunas. This contrasts with the acellular condition of its ectothermic close relatives. The distribution of this character suggests that it co-evolved with red-muscle endothermy, hinting at a common physiological mechanism that would link bone histology to endothermy in these distantly related teleost lineages.
%B Biology Letters %V 14 %P 20180270 %G eng %R 10.1098/rsbl.2018.0270} URL = {https://royalsocietypublishing.org/doi/abs/10.1098/rsbl.2018.0270 %0 Journal Article %J Frontiers in Plant Science %D 2018 %T Latitudinal Patterns in European Seagrass Carbon Reserves: Influence of Seasonal Fluctuations versus Short-Term Stress and Disturbance Events %A L.M. Soissons %A E.P. Haanstra %A M.M. van Katwijk %A R. Asmus %A I. Auby %A L. Barillé %A F.G. Brun %A P.G. Cardoso %A Nicolas Desroy %A Jérôme Fournier %A F. Ganthy %A J.M. Garmendia %A Laurent Godet %A T.F. Grilo %A P. Kadel %A B. Ondiviela %A G. Peralta %A A. Puente %A M. Recio %A L. Rigouin %A M. Valle %A P.M.J. Herman %A T.J. Bouma %XSeagrass meadows form highly productive and valuable ecosystems in the marine environment. Throughout the year, seagrass meadows are exposed to abiotic and biotic variations linked to (i) seasonal fluctuations, (ii) short-term stress events such as, e.g., local nutrient enrichment, and (iii) small-scale disturbances such as, e.g., biomass removal by grazing. We hypothesized that short-term stress events and smallscale disturbances may affect seagrass chance for survival in temperate latitudes. To test this hypothesis we focused on seagrass carbon reserves in the form of starch stored seasonally in rhizomes, as these have been defined as a good indicator for winter survival. Twelve Zostera noltei meadows were monitored along a latitudinal
gradient in Western Europe to firstly assess the seasonal change of their rhizomal starch content. Secondly, we tested the effects of nutrient enrichment and/or biomass removal on the corresponding starch content by using a short-term manipulative field experiment at a single latitude in the Netherlands. At the end of the growing season, we observed a weak but significant linear increase of starch content along the latitudinal gradient from south to north. This agrees with the contention that such reserves are essential for regrowth after winter, which is more severe in the north. In addition, we also observed a weak but significant positive relationship between starch content at the beginning of the growing season and past winter temperatures. This implies a lower regrowth potential after severe winters, due to diminished starch content at the beginning of the growing season. Short-term stress and disturbances
may intensify these patterns, because our manipulative experiments show that when nutrient enrichment and biomass loss co-occurred at the end of the growing season, Z. noltei starch content declined. In temperate zones, the capacity of seagrasses to accumulate carbon reserves is expected to determine carbon-based regrowth after winter. Therefore, processes affecting those reserves might affect seagrass resilience. With increasing human pressure on coastal systems, short- and small-scale stress events are expected to become more frequent, threatening the resilience of seagrass ecosystems, particularly at higher latitudes, where populations tend to have an annual cycle highly dependent on their storage capacity.
Intertidal mudflats are among the most productive ecosystems and microphytobenthic (MPB) biofilms play a key role in primary production. MPB primary production varies at short spatial and temporal scales. Accurate measurements thus require rapid non-intrusive methods like pulse amplitude modulate (PAM) fluorescence. However, the effect of granulometry and chl a concentration profile in light attenuation on irradiance and on fluorescence signal in the photic layer need to be taken into account when primary production is estimated using PAM. We propose a tool to readjust raw photosynthetic parameters (rETRmax, α, Ik) estimated from PAM measurements on the field, to avoid over- or underestimation. To develop the tool, we used models previously designed by Kühl and Jørgensen (1992), Serôdio (2004) and Forster and Kromkamp (2004) by integrating the chl a distribution profiles and sediment granulometry from pure sand to pure mud. The sensitivity of the correction to sediment granulometry and the shape of chl a profile were evaluated theoretically using a typical fluorescence data set obtained using PAM measurements. Our results confirm the importance of accounting for both the chl a profile and sediment granulometry when estimating a light attenuation coefficient. We show that, with the same chl a profile, the photosynthetic parameters are more underestimated in mud than in a sandy environment. Thus, granulometry and the chl a profile need to be systematically quantified and used to correct raw data measured in field studies using PAM before estimating photosynthetic parameters. The numerical tool is available as an e-document that is simple and easy to apply to any PAM data.
%B Journal of Experimental Marine Biology and Ecology %V 503 %P 136-146 %G eng %U https://www.sciencedirect.com/science/article/pii/S0022098117303325 %R https://doi.org/10.1016/j.jembe.2018.02.007 %0 Journal Article %J Aquatic Living Resources %D 2018 %T Temporal variation of secondary migrations potential: concept of temporal windows in four commercial bivalve species %A Martin Forêt %A Réjean Tremblay %A Urs Neumeier %A Frédéric Olivier %K Bivalves recruits %K drifting %K secondary migrations %K temporal windows %XPost-settlement dispersal potential of four commercial bivalve species (Mytilus edulis, Pecten maximus, Venus verrucosa and Ruditapes philippinarum) were studied through the assessment of recruits' sinking velocities by using a sinking velocity tube of five meters height. In parallel, dynamics of shear stress were monitored for five months on a tidal habitat characterized by the presence and the dispersal of the four species. By coupling both datasets we propose first theoretical estimates of temporal windows of secondary migrations. These experiments revealed interspecific differences in migration potential relate to shell shapes and behaviour, especially to secretion of byssal threads. The sensitivity to passive and active post-settlement migrations seems to rely on the synchronisation between the arrival on the sediment, the tidal regime (spring tide, neap tide), but also the rate of growth of the recruits. The present study confirms that patterns of secondary migrations of bivalve recruits result from a close physical-biological coupling involving benthic boundary layer (BBL) hydrodynamics and shell morphology as well as eco-ethological responses to environmental conditions but clearly modulated by the growth dynamics until a threshold size when drifting is no longer possible.
%B Aquatic Living Resources %V 31 %P 1-9 %8 08/2018 %G eng %U https://www.alr-journal.org/articles/alr/abs/2018/01/alr170158/alr170158.html %N 19 %R https://doi.org/10.1051/alr/2018007 %0 Journal Article %J Ecosphere %D 2018 %T Trophic cues promote secondary migrations of bivalve recruits in a highly dynamic temperate intertidal system %A Foret, Martin %A Barbier, Pierrick %A Tremblay, Rejean %A Tarik Meziane %A Neumeier, Urs %A Duvieilbourg, Eric %A Olivier, Frédéric %B Ecosphere %V 9 %P e02510 %8 Apr-12-2018 %G eng %U https://onlinelibrary.wiley.com/toc/21508925/9/12 %N 12 %! Ecosphere %R 10.1002/ecs2.2018.9.issue-1210.1002/ecs2.2510 %0 Journal Article %J Ecosphere %D 2018 %T Trophic cues promote secondary migrations of bivalve recruits in a highly dynamic temperate intertidal system %A Foret, Martin %A Barbier, Pierrick %A Tremblay, Rejean %A Meziane, Tarik %A Neumeier, Urs %A Duvieilbourg, Eric %A Olivier, Frédéric %B Ecosphere %V 9 %P e02510 %8 Apr-12-2018 %G eng %U https://onlinelibrary.wiley.com/toc/21508925/9/12 %N 12 %! Ecosphere %R 10.1002/ecs2.2018.9.issue-1210.1002/ecs2.2510 %0 Journal Article %J Scientific Reports %D 2018 %T The unique functioning of a pre-Columbian Amazonian floodplain fishery %A Rumsaïs Blatrix %A Bruno Roux %A Philippe Béarez %A Gabriela Prestes-Carneiro %A Marcelo Amaya %A Jose Luis Aramayo %A Leonor Rodrigues %A Umberto Lombardo %A Jose Iriarte %A Jonas Gregorio de Souza %A Mark Robinson %A Cyril Bernard %A Marc Pouilly %A Mélisse Durécu %A Carl F. Huchzermeyer %A Mashuta Kalebe %A Alex Ovando %A Doyle McKey %B Scientific Reports %V 8 %G eng %U https://doi.org/10.1038/s41598-018-24454-4 %R 10.1038/s41598-018-24454-4 %0 Report %D 2017 %T Cross-linking plankton indicators to better define GES of pelagic habitats - EcApRHA Deliverable WP1.4 %A Budria, Alexandre %A Anais Aubert %A Rombouts, Isabelle %A Ostle, Clare %A Angus Atkinson %A Widdicombe, Claire %A Goberville, Eric %A Luis Felipe Artigas %A Johns, David %A Padegimas, Bernardas %A Corcoran, Emily %A McQuatters-Gollop, Abigail %X The multimetric approach is a methodological tool which can be used to study a range of systems, including GES assessment of marine waters. Three indicators (PH1, PH2 and PH3) are currently being developed in the frame of the OSPAR convention for the pelagic habitat component. The three PH indicators provide information on different and complementary aspects of the plankton community that, only when considered altogether, provide a holistic vision of the ecosystem which is central to GES assessment. The present document aims at combining their information for the first time, following a multimetric approach. For this purpose, it was decided that the Plymouth Marine Laboratory L4 station would be the focus of this deliverable for the period 2000-2014.ABSTRACT: Arctic coastal ecosystems are likely to be strongly affected by predicted environmental changes such as sea-ice decline and increase in freshwater input and turbidity. These changes are expected to impact primary production dynamics and consequently benthic consumers. The trophic relationship between primary producers and benthic primary consumers were compared in 2 Arctic fjords with different seasonal ice-cover: Young Sound (NE Greenland, a high-Arctic fjord) and Kongsfjorden (Svalbard Archipelago, a sub-Arctic fjord). For comparison, we selected the filter-feeding bivalve Astarte moerchi (belonging to the complex A. borealis), which has a broad geographical distribution in the Arctic. The bivalve digestive glands and food sources were characterized with fatty acids (FAs), bulk stable isotopes, and compound-specific stable isotopes of individual FAs. Our results suggest that diatoms of pelagic and/or benthic origin are the main contributors to the A. moerchi diet in Young Sound and make up a less important fraction of the diet in the Kongsfjorden population. A contribution by sympagic diatoms is clearly excluded in the sub-Arctic fjord and needs to be further assessed in the Arctic fjord. The A. moerchi diet in sub-Arctic Kongsfjorden is more diversified, varies with season, and has contributions from dinoflagellates and macroalgal detritus. These results, together with higher concentrations of total FAs in the Young Sound population, demonstrated and characterized the trophic plasticity of this bivalve species. Based on these results, we discuss potential effects of environmental factors (shifts in trophic resources, increase in turbidity) for A. moerchi populations in changing Arctic ecosystems.
%B Marine Ecology Progress Series %V 567 %P 157-172 %G eng %0 Journal Article %J Marine Ecology Progress Series %D 2017 %T Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord: a multi-biomarker approach %A Gaillard, B %A Tarik Meziane %A Réjean Tremblay %A P Archambault %A Blicher, M E %A Laurent Chauvaud %A Rysgaard, S %A Frédéric Olivier %XABSTRACT: It is generally agreed that pelagic-benthic coupling is tight on Arctic shelves, i.e. that organic matter produced in the surface layers supports the seafloor and benthos. However, this paradigm is mainly based on the assumption that phytoplankton and ice algae are the main sources of carbon for the benthic communities. Climate change is expected to alter the relative contribution of food sources for benthic organisms. Macroalgal biomass is predicted to increase in near-shore systems in response to increased temperature and reduced sea ice cover. Thus, a better understanding of the relative contribution of benthic and pelagic components in benthic food webs in the Arctic is needed. In this study, a multi-biomarker approach (stable isotopes, fatty acid trophic markers, and compound-specific stable isotope analysis) was applied to link potential sources of carbon, including particulate organic matter from subsurface and bottom waters, sediment organic matter, and 6 macroalgal species to the diet of the bivalve Astarte elliptica collected below the euphotic zone in a sub-Arctic fjord (Kobbefjord, Greenland). Results showed that A. elliptica feeds on particulate and sediment organic matter and that brown macroalgae significantly support the Arctic benthic food web. Multi-biomarker approaches can be used to determine the diet of benthic organisms and track temporal variability in sources of food. It therefore appears to be an interesting method to study food regime strategies in response to changing primary production dynamics.
%B Marine Ecology Progress Series %V 567 %P 139-156 %G eng %0 Journal Article %J Journal of Sea Research %D 2017 %T Nursery function of coastal temperate benthic habitats: New insight from the bivalve recruitment perspective %A Pierrick Barbier %A Tarik Meziane %A Forêt, M %A Réjean Tremblay %A Robert, R %A Frédéric Olivier %X
Marine habitat function has been typically investigated in terms of biogeochemical regulation but rarely in terms of population renewal, which is mainly controlled by recruitment dynamics. The recruitment phase is crucial for
organisms with a bentho-pelagic life cycle, such as bivalves, and it regulates the population renewal success. This study provides new insight on the role of temperate benthic habitats on bivalve recruitment, as a function of
nursery areas. Six dominant benthic habitats of the Chausey archipelago (Normandy, France) were studied. In each habitat, bivalve recruit assemblages were described at the end of two reproductive seasons. Furthermore, Ostrea edulis
juveniles were immerged on each habitat during two months to compare growth performances and feeding status, estimated by fatty acid composition. Recruit assemblages differ from each habitat according to sediment grain-size composition and bathymetrical levels. Subtidal habitats, and especially Crepidula fornicata banks and Glycymeris glycymeris coarse sands, supported the highest species abundance and richness of recruits. All O. edulis juveniles fed on the same trophic resources but digestive glands of juveniles from C. fornicata banks were more concentrated in total fatty acids than those from subtidal G. glycymeris coarse sands and maerl banks. Our results depict the key role of subtidal and structured habitats, composed of ecosystem engineers, in enhancing bivalve recruitment and extending the bivalve population renewal. This study suggests that the crucial role of
these habitats as bivalve nurseries must be integrated in management perspectives
This study aims to describe the patterns of soft bottom macrozoobenthic richness along French coasts. It is based on a collaborative database developed by the “Réseau des Stations et Observatoires Marins” (RESOMAR). We investigated patterns of species richness in sublittoral soft bottom habitats (EUNIS level 3) at two different spatial scales: 1) seaboards: English Channel, Bay of Biscay and Mediterranean Sea and 2) 0.5° latitudinal and longitudinal grid. Total observed richness, rarefaction curves and three incidence-based richness estimators (Chao2, ICE and Jacknife1) were used to compare soft bottom habitats species richness in each seaboard. Overall, the Mediterranean Sea has the highest richness and despite higher sampling effort, the English Channel hosts the lowest number of species. The distribution of species occurrence within and between seaboards was assessed for each major phylum using constrained rarefaction curves. The Mediterranean Sea hosts the highest number of exclusive species. In pairwise comparisons, it also shares a lower proportion of taxa with the Bay of Biscay (34.1%) or the English Channel (27.6%) than that shared between these two seaboards (49.7%). Latitudinal species richness patterns along the Atlantic and English Channel coasts were investigated for each major phylum using partial LOESS regression controlling for sampling effort. This showed the existence of a bell-shaped latitudinal pattern, highlighting Brittany as a hotspot for macrobenthic richness at the confluence of two biogeographic provinces.
%B Journal of Sea Research %V 130 %P 96 - 106 %G eng %U http://www.sciencedirect.com/science/article/pii/S1385110116302660 %R https://doi.org/10.1016/j.seares.2017.03.011 %0 Journal Article %J Eos %D 2017 %T Saving Our Marine Archives %A Dassié, Emilie %A DeLong, Kristine %A Kilbourne, Hali %A Williams, Branwen %A Abram, Nerilie %A Brenner, Logan %A Brahmi, Chloé %A Cobb, Kim %A Corrège, Thierry %A Dissard, Delphine %A Emile-Geay, Julien %A Evangelista, Heitor %A Evans, Michael %A Farmer, Jesse %A Felis, Thomas %A Gagan, Michael %A Gillikin, David %A Goodkin, Nathalie %A Khodri, Myriam %A Lavagnino, Ana %A LaVigne, Michèle %A Claire E. Lazareth %A Linsley, Braddock %A Lough, Janice %A McGregor, Helen %A Nurhati, Intan %A Ouellette, Gilman %A Perrin, Laura %A Raymo, Maureen %A Rosenheim, Brad %A Sandstrom, Michael %A Schöne, Bernd %A Sifeddine, Abdelfettah %A Stevenson, Samantha %A Thompson, Diane %A Waite, Amanda %A Wanamaker, Alan %A Wu, Henry %B Eos %8 Dec-02-2018 %G eng %U https://eos.org/project-updates/saving-our-marine-archives %! Eos %R 10.1029/2017EO068159 %0 Journal Article %J Limnology and Oceanography %D 2017 %T Seasonal and latitudinal variation in seagrass mechanical traits across Europe: The influence of local nutrient status and morphometric plasticity %A L.M. Soissons %A M.M. van Katwijk %A G. Peralta %A F.G. Brun %A P.G. Cardoso %A T.F. Grilo %A B. Ondiviela %A M. Recio %A M. Valle %A J.M. Garmendia %A F. Ganthy %A I. Auby %A L. Rigouin %A Laurent Godet %A Jérôme Fournier %A Nicolas Desroy %A L. Barillé %A P. Kadel %A R. Asmus %A P.M.J. Herman %A T.J. Bouma %XSeagrasses are marine flowering plants distributed worldwide. They are however threatened, mostly due to the increase of human activities. Seagrasses have the capacity to adapt their morphological, physiological, and mechanical traits to their local conditions. Mechanical traits have been identified as a good tool to investigate a plant-species capacity to withstand physical forces or disturbances but are still sparsely studied in seagrasses. With this study, we aimed to assess how the mechanical traits of a broadly spread seagrass species vary along a latitudinal gradient in relation to its morphometric plasticity and nutrient status. We found that seagrasses acclimate their mechanical traits in relation to their physiological or morphological traits, both over the growing season and across a latitudinal range: leaves were weaker and thinner in northern areas, particularly at the end of the growing season. Besides the influence of the latitudinal gradient, leaf mechanical strength and stiffness were both strongly affected by their morphometric plasticity. Moreover, we showed that leaves mechanical traits change depending on their nutrient status: leaves were stronger and stiffer in oligotrophic conditions as compared to more eutrophic conditions. Thus, our results imply that, under eutrophication, leaves become weaker and thus more vulnerable to physical forces. This vulnerability is higher in the north at the end of the growing season. The latter is consistent with the more ephemeral character of northern seagrass meadows, in contrast to the more evergreen southern meadows.
%B Limnology and Oceanography %G eng %U http://onlinelibrary.wiley.com/doi/10.1002/lno.10611/full %R 10.1002/lno.10611 %0 Journal Article %J PLOS ONE %D 2017 %T †Sorbinicharax verraesi: An unexpected case of a benthic fish outside Acanthomorpha in the Upper Cretaceous of the Tethyan Sea %A Mayrinck, D. %A Brito, Paulo M. %A Meunier, Francois J. %A Alvarado-Ortega, J. %A Otero, Olga %X†Sorbinicharax verraesi is a marine teleostean fish from the Upper Cretaceous of Nardò (Italy). It was first attributed to the otophysan order Characiformes, which represents potential evidence for the controversial marine origin of the clade. Through a review of all the available material, we demonstrate that this species is not an otophysan since it lacks key structures that would allow for its inclusion in this group. †Sorbinicharax has a body shape that recalls ground fishes classically assigned to Acanthomorpha. However, no unambiguous feature allows us to relate it to this clade. In fact, the presence of cellular bony tissue supports its exclusion from Eurypterygii. Since no feature permits the definitive attribution of †Sorbinicharax to any teleost group, it remains as Teleostei incertae sedis. We infer that the morphology of †Sorbinicharax indicates a benthic ecology. It displays: an anteriorly wide body with enlarged ribs; large pectoral fins, while anal and dorsal fins are reduced; a large head measuring ¼ of the total body length; and a mouth opening dorsally in a high position. Such morphology was so far undescribed in Nardo. It is surprisingly displayed by a non-eurypterygian teleost fish which means by a fish which does not belong to the clades that diversify since the upper Cretaceous and include the extant families that show ground ecomorphologies.
%B PLOS ONE %V 12 %P 1-15 %8 08 %G eng %U https://doi.org/10.1371/journal.pone.0183879 %R 10.1371/journal.pone.0183879 %0 Journal Article %J Progress in Oceanography %D 2017 %T Trophic position increases with thermocline depth in yellowfin and bigeye tuna across the Western and Central Pacific Ocean %A Houssard, P. %A Lorrain, A. %A Tremblay-Boyer, L. %A Allain, V. %A Graham, B.S. %A Menkes, C.E. %A Pethybridge, H. %A Couturier, L.I.E. %A Point, D. %A Leroy, Bruno %A Receveur, A. %A Hunt, B.P.V. %A Vourey, E. %A Bonnet, S. %A Rodier, M. %A Raimbault, P. %A Eric Feunteun %A Kuhnert, P.M. %A Munaron, J.-M. %A Lebreton, B. %A Otake, T. %A Letourneur, Y. %B Progress in Oceanography %V 154 %P 49-63 %G eng %U https://www.sciencedirect.com/science/article/pii/S007966111630177X %R 10.1016/j.pocean.2017.04.008 %0 Journal Article %J Current Biology %D 2016 %T A 365-Million-Year-Old Freshwater Community Reveals Morphological and Ecological Stasis in Branchiopod Crustaceans. %A Pierre Gueriau %A Nicolas Rabet %A Clément, Gaël %A Linda Lagebro %A Vannier, Jean %A Briggs, Derek E G %A Charbonnier, Sylvain %A Olive, Sébastien %A Béthoux, Olivier %XBranchiopod crustaceans are represented by fairy, tadpole, and clam shrimps (Anostraca, Notostraca, Laevicaudata, Spinicaudata), which typically inhabit temporary freshwater bodies, and water fleas (Cladoceromorpha), which live in all kinds of freshwater and occasionally marine environments [1, 2]. The earliest branchiopods occur in the Cambrian, where they are represented by complete body fossils from Sweden such as Rehbachiella kinnekullensis [3] and isolated mandibles preserved as small carbonaceous fossils [4-6] from Canada. The earliest known continental branchiopods are associated with hot spring environments [7] represented by the Early Devonian Rhynie Chert of Scotland (410 million years ago) and include possible stem-group or crown-group Anostraca, Notostraca, and clam shrimps or Cladoceromorpha [8-10], which differ morphologically from their modern counterparts [1, 2, 11]. Here we report the discovery of an ephemeral pool branchiopod community from the 365-million-year-old Strud locality of Belgium. It is characterized by new anostracans and spinicaudatans, closely resembling extant species, and the earliest notostracan, Strudops goldenbergi [12]. These branchiopods released resting eggs into the sediment in a manner similar to their modern representatives [1, 2]. We infer that this reproductive strategy was critical to overcoming environmental constraints such as seasonal desiccation imposed by living on land. The pioneer colonization of ephemeral freshwater pools by branchiopods in the Devonian was followed by remarkable ecological and morphological stasis that persists to the present day.
%B Current Biology %V 26 %P 383-390 %8 02/2016 %G eng %N 3 %R 10.1016/j.cub.2015.12.039 %0 Journal Article %J Freshwater Biology %D 2016 %T Determinants of local and regional communities in intermittent and perennial headwaters of the Bolivian Amazon %A T. Datry %A N. Moya %A J. Zubieta %A Thierry Oberdorff %XSUMMARY
1. The effect of drying events on aquatic biodiversity is still overlooked in wet Neotropical systems. Yet, the responses of local communities and metacommunities in these biodiversity hotspots may differ from what is reported in other areas.
2. We addressed the effect of drying events on local and regional fish and macroinvertebrate communities in the headwaters of the Chipiriri River basin, in the wet Neotropical piedmont of Bolivia. According to current knowledge in intermittent rivers and ephemeral streams (IRES) ecology, we predicted that intermittent (INT) sites would harbour lower a-diversity, but higher b-diversity, than perennial (PER) sites, due to local, negative effect of drying combined with the existence of multiple recovery stages at the network scale.
3. Although habitat variables were similar between INT and PER sites, local and regional diversity patterns differed. Local invertebrate communities were not different between site types as soon as 4–6 weeks after flow resumption. The proximity of colonist sources and frequent rainfall probably enhanced persistence through dry periods and high resilience. In contrast, fish communities were still poorer at INT than PER sites, indicating they were still in the process of recolonising upstream INT reaches.
4. b-diversity analyses confirmed that invertebrate and fish metacommunities were not at the same recovery stage because (i) b-diversity of invertebrates was best explained by physical and environmental distances at both INT and PER sites, whereas that of fish was explained only by physical distances at INT sites; (ii) fish b-diversity was higher at INT than at PER sites, but invertebrate b-diversity was similar; and (iii) physical distances were correlated with the turnover component of invertebrate b-diversity but with the nestedness component for fish.
5. Exploring regional community patterns in IRES and across biota with different dispersal abilities and modes can advance metacommunity theory and improve our ability to predict local community composition in dynamic ecosystems.
%B Freshwater Biology %G eng %R doi:10.1111/fwb.12706 %0 Journal Article %J Science Advances %D 2016 %T Empirical observations of the spawning migration of European eels: The long and dangerous road to the Sargasso Sea. %A D. Righton %A H. Westerberg %A Eric Feunteun %A F. Okland %A P. Gargan %A E. Amilhat %A J. Metcalfe %A J. Lobon-Cervia %A N. Sjöberg %A J. Simon %A Anthony Acou %A M. Vedor %A A. Walker %A Thomas Trancart %A U Brämick %A K. Aarestrup %X The spawning migration of the European eel (Anguilla anguilla L.) to the Sargasso Sea is one of the greatest animal migrations. However, the duration and route of the migration remain uncertain. Using fishery data from 20 rivers across Europe, we show that most eels begin their oceanic migration between August and December. We used electronic tagging techniques to map the oceanic migration from eels released from four regions in Europe. Of 707 eels tagged, we received 206 data sets. Many migrations ended soon after release because of predation events, but we were able to reconstruct in detail the migration routes of >80 eels. The route extended from western mainland Europe to the Azores region, more than 5000 km toward the Sargasso Sea. All eels exhibited diel vertical migrations, moving from deeper water during the day into shallower water at night. The range of migration speeds was 3 to 47 km day−1. Using data from larval surveys in the Sargasso Sea, we show that spawning likely begins in December and peaks in February. Synthesizing these results, we show that the timing of autumn escapement and the rate of migration are inconsistent with the century-long held assumption that eels spawn as a single reproductive cohort in the springtime following their escapement. Instead, we suggest that European eels adopt a mixed migratory strategy, with some individuals able to achieve a rapid migration, whereas others arrive only in time for the following spawning season. Our results have consequences for eel management. %B Science Advances %G eng %U https://advances.sciencemag.org/content/2/10/e1501694 %R 10.1126/sciadv.1501694 %0 Journal Article %J Ecology of Freshwater Fish %D 2016 %T Environmental correlates of body size distribution in Cyprinidae (Actinopterygians) depend on phylogenetic scale %A G. Denys %A Pablo Tedesco %A Thierry Oberdorff %A P. Gaubert %XABSTRACT: The pattern of increasing species body size with increasing latitude has been noticed in different groups of animals. Here, we used seven key environmental factors and independent contrasts to assess body size latitudinal clines in Cyprinidae at two phylogenetic levels (inter- and intragenera), which were defined using a genus-level supertree. Model selection procedures revealed that environmental factors shaping body size variation in Cyprinidae differed according to the phylogenetic scale considered. At the higher phylogenetic level, we found that both temperature (negative effect) and habitat availability (positive effect of drainage basin surface area) constituted mechanistic explanations of large-scale body size distribution. No temperature-related body size cline was observed at the intragenus level. Instead, competitive interaction (negative effect of species richness), habitat availability (positive effect of drainage basin surface area), migration ability and available energy (positive effects of glacial coverage and actual evapotranspiration) constitute alternative explanations at this lower phylogenetic scale. We conclude that (i) at the intergenus level, cyprinids do show a tendency to be smaller at high temperatures and larger at low temperatures, (ii) this tendency no longer exists at the intragenus level, (iii) latitude per se is a weak predictor of body size clines whatever the taxonomic level analysed, (iv) generalising geographical body size patterns may be rendered difficult by the superimposition of a series of mechanisms across different taxonomic scales, and (v) habitat size, here acting positively at both taxonomic scales, may play a major role in shaping riverine species body size clines.
The feeding ecology of leptocephali has remained poorly understood because they apparently feed on particulate organic matter (POM), which varies in composition, and it is unclear which components of the POM they assimilate. The δ13C and δ15N stable isotope (SI) and fatty acid (FA) compositions of 3 families of leptocephali and POM were compared in 3 latitudinal current zones of the western South Pacific. The δ15N signatures of leptocephali and POM overlapped, with both having their lowest values in the southern current zone. POM in general (across all zones) contained 38 FAs and was rich in saturated FAs (SFA) (16:0, 18:0, 14:0), while leptocephali contained 50 FAs, with high proportions of 16:0, and higher contributions of 22:6ω3, 20:5ω3, 18:1ω9, 16:1ω7 and other FAs than found in the POM. Serrivomeridae leptocephali in the north had higher δ15N signatures and were also distinguished from Nemichthyidae and Muraenidae larvae by their FA compositions (higher SFAs, lower 22:6ω3 and 20:5ω3). Although SI signatures of the Serrivomeridae larvae did not clearly vary with size, 16:0 and 18:0 FA proportions decreased with increasing larval size, and 22:6ω3 and 16:1ω7 increased in larger larvae. Correspondences between the latitudinal variations in nitrogen SI signatures and FA compositions of POM with those of leptocephali and the presence of FA markers of both autotrophic and heterotrophic organisms were consistent with leptocephali feeding on POM. POM can contain various materials from primary producers and heterotrophic microorganisms, but differences in the SI signatures and FA compositions in leptocephali remain to be explained through further research.
%B Marine Ecology and Progress Series %V 544 %P 225-241 %@ doi:10.3354/meps11575 %G eng %0 Journal Article %J Marine Environmental Research %D 2016 %T Influence of intertidal recreational fisheries and ‘bouchot’ mussel culture on bivalve recruitment %A Nicolas Toupoint %A Pierrick Barbier %A Réjean Tremblay %A P Archambault %A Christopher W. McKindsey %A Gesche Winkler %A Tarik Meziane %A Frédéric Olivier %K ‘Bouchot’ %XAbstract In coastal environments, fishing and aquaculture may be important sources of disturbance to ecosystem functioning, the quantification of which must be assessed to make them more sustainable. In the Chausey Archipelago, France, recreational fishing and commercial shellfish farming are the only two evident anthropogenic activities, dominated by bivalve hand-raking and ‘bouchot’ mussel culture, respectively. This study evaluates the impact of both activities on bivalve recruitment dynamics by comparing primary recruitment intensity (short-term effect) and recruitment efficiency (medium-term effect) by sampling bivalves in reference (undisturbed) and disturbed (i.e. subjected to hand-raking or in ‘bouchot’ mussel culture areas) parcels throughout and at the end of the recruitment season, respectively. Specific hypotheses evaluated were that (H1) bivalve hand-raking negatively affects bivalve recruitment and that (H2) ‘bouchot’ mussel culture promotes bivalve recruitment. Patterns in bivalve community structure in reference parcels (i.e. natural pattern) differed between initial and final recruitment, underlining the great importance of early post-settlement processes, particularly secondary dispersal. Primary recruitment intensity was inhibited in hand-raking parcels whereas it was promoted in ‘bouchot’ mussel culture parcels, but the effect on recruitment efficiency was muted for both activities due to post-settlement processes. Nevertheless, the importance of effects that occur during the first step of recruitment should not be ignored as they may affect bivalve communities and induce immediate consequences on the trophic web through a cascade effect. Finally, it is highlighted that hand-raking damages all life stages of the common cockle Cerastoderma edule, one of the major target species, suggesting that this activity should be managed with greater caution than is currently done.
%B Marine Environmental Research %V 117 %P 1 - 12 %G eng %U http://www.sciencedirect.com/science/article/pii/S0141113616300319 %R http://dx.doi.org/10.1016/j.marenvres.2016.03.006 %0 Journal Article %J Fisheries %D 2016 %T International Perspectives on the Effects of Climate Change on Inland Fisheries %A I.J. Winfield %A C. Baigun %A P.A. Balykin %A B. Becker %A Y. Chen %A A.F. Filipe %A Y.V. Gerasimov %A A.L. Godinho %A R.M. Hugues %A J.D. Koehn %A D.N. Kutsyn %A V. Mendoza-Portillo %A Thierry Oberdorff %A A.M. Orlov %A A.P. Pedchenko %A F. Pletterbauer %A I.G. Prado %A R. Rösch %A S.J. Vatland %B Fisheries %V 41 %P 399-405 %8 07/2016 %G eng %N 7 %R 10.1080/03632415.2016.1182513 %0 Journal Article %J Freshwater Biology %D 2016 %T Metacommunity patterns across three Neotropical catchments with varying environmental harshness %A T. Datry %A A.S. Melo %A N. Moya %A J. Zubieta %A E. De La Barra %A Thierry Oberdorff %XSUMMARY
1. Most metacommunity studies indicate that dispersal processes play a minor role compared with species sorting in explaining metacommunity organisation, in particular, in stream systems. However, the role of dispersal could vary with environmental harshness, as a result of frequent resetting of community succession by disturbances and the selection of generalist species from regional species pools. The importance of dispersal may also be mitigated by species dispersal ability.
2. In this study, we explored how species sorting and dispersal shaped invertebrate and fish metacommunities across streams in three tropical headwater catchments in Bolivia with contrasting environmental harshness, including flow regime, altitude and climate conditions. We addressed the hypothesis that the relative roles of dispersal and species sorting vary with environmental harshness: we predicted that the role of species sorting would predominate in benign conditions, whereas that of dispersal would predominate under moderate environmental harshness, and that neither dispersal nor species sorting would be relevant to explain metacommunities under high environmental harshness. We also hypothesised that the role of dispersal would decrease with increasing species dispersal ability.
3. Although there was little or no spatial autocorrelation of environmental distances (i.e. environmental differences) across the headwater catchments, community similarity correlated more strongly with environmental than spatial distances among headwater sites that had low environmental harshness, but the opposite pattern was observed among sites with moderate environmental harshness. Under high environmental harshness, neither environmental harshness nor spatial distances between sites explained community similarity.
4. Under moderate environmental harshness, the correlation between community similarity and spatial distances was the strongest for moderate dispersers of both invertebrates and fish. Yet, in contrast to fish, strongly dispersing invertebrate taxa were spatial structured, suggesting that they were not able to reach all sites as predicted.
5. Our results suggest the role of dispersal might be underestimated, notably in systems prone to environmental harshness. Better proxies for dispersal, along with the use of spatial distances to account for resistance to animal movements in river systems and that account for flow magnitude and directionality, slope, riparian vegetation, wind and streambed roughness, may promote a more realistic integration of dispersal processes in basic and applied metacommunity research.
During ArcticNet surveys aboard ‘CCGS Amundsen’ in 2011, several subtidal stations located in Canadian Archipelago were sampled in order to study the composition of their benthic communities. Among the abundant material sampled, several specimens of rare polychaete species were found. Examination of this material showed four species not previously recorded in the area, and a new species described herein. Descriptions of these specimens are given in this work. Ophelina brattegardi Kongsrud et al., 2011 is characterized by a body composed of 27–28 chaetigers, by having the parapodia of the last four chaetigers shifted to the ventral side of the body, and by lacking branchiae in mid-body chaetigers. Macrochaeta polyonix Eliason, 1962 is unique within the genus in having several (instead of one or two) compound neurochaetae in anterior parapodia. Chaetozone acuta Banse & Hobson, 1968 is characterized by having spines from anterior third of the body and arranged in bundles composed of " # "just a few chaetae. Chaetozone jubata Chambers & Woodham, 2003 can be distinguished from similar species by having very long capillary chaetae from chaetiger 2 or 3. Finally, Dialychone hervyae n. sp. is characterized by bearing four pairs of radioles with narrow flanges, by the bilobed tip of its first peristomial ring that projects beyond the collar, and by the paleate thoracic notochaetae bearing long mucros.
%B Journal of the Marine Biological Association of the United Kingdom %P 1-10 %8 007 %G eng %U https://www.cambridge.org/core/article/div-class-title-a-new-species-and-four-new-records-of-sedentary-polychaetes-from-the-canadian-high-arctic-div/3950848DE7205A141D2159F4FA91FDA2 %R 10.1017/S0025315416000953 %0 Journal Article %J Marine Biology %D 2016 %T Picophytoplankton contribution to Mytilus edulis growth in an intensive culture environment %A Rémi Sonier %A Filgueira, R. %A Guyondet, T. %A Réjean Tremblay %A Frédéric Olivier %A Tarik Meziane %A Starr, M. %A LeBlanc, A. R. %A Comeau, L. A. %B Marine Biology %V 163 %P 1–15 %G eng %U http://dx.doi.org/10.1007/s00227-016-2845-7 %R 10.1007/s00227-016-2845-7 %0 Journal Article %J Oecologia %D 2016 %T Pollen limitation may be a common Allee effect in marine hydrophilous plants: implications for decline and recovery in seagrasses %A B.I. Van Tussenbroek %A L.M. Soissons %A T.J. Bouma %A R. Asmus %A I. Auby %A F.G. Brun %A P.G. Cardoso %A Nicolas Desroy %A Jérôme Fournier %A F. Ganthy %A J.M. Garmendia %A Laurent Godet %A T.F. Grilo %A P. Kadel %A B. Ondiviela %A G. Peralta %A M. Recio %A M. Valle %A T. Van der Heide %A van Katwijk, M M %B Oecologia %P 1-15 %G eng %R 10.1007/s00442-016-3665-7 %0 Journal Article %J Proceedings of the National Academy of Sciences %D 2016 %T Present-day African analogue of a pre-European Amazonian floodplain fishery shows convergence in cultural niche construction %A McKey, Doyle B. %A Durécu, Mélisse %A Marc Pouilly %A Bearez, Philippe %A Ovando, Alex %A Kalebe, Mashuta %A Carl F. Huchzermeyer %XErickson [Erickson CL (2000) Nature 408 (6809):190–193] interpreted features in seasonal floodplains in Bolivia’s Beni savannas as vestiges of pre-European earthen fish weirs, postulating that they supported a productive, sustainable fishery that warranted cooperation in the construction and maintenance of perennial structures. His inferences were bold, because no close ethnographic analogues were known. A similar present-day Zambian fishery, documented here, appears strikingly convergent. The Zambian fishery supports Erickson’s key inferences about the pre-European fishery: It allows sustained high harvest levels; weir construction and operation require cooperation; and weirs are inherited across generations. However, our comparison suggests that the pre-European system may not have entailed intensive management, as Erickson postulated. The Zambian fishery’s sustainability is based on exploiting an assemblage dominated by species with life histories combining high fecundity, multiple reproductive cycles, and seasonal use of floodplains. As water rises, adults migrate from permanent watercourses into floodplains, through gaps in weirs, to feed and spawn. Juveniles grow and then migrate back to dry-season refuges as water falls. At that moment fishermen set traps in the gaps, harvesting large numbers of fish, mostly juveniles. In nature, most juveniles die during the first dry season, so that their harvest just before migration has limited impact on future populations, facilitating sustainability and the adoption of a fishery based on inherited perennial structures. South American floodplain fishes with similar life histories were the likely targets of the pre-European fishery. Convergence in floodplain fish strategies in these two regions in turn drove convergence in cultural niche construction.
%B Proceedings of the National Academy of Sciences %G eng %U http://www.pnas.org/content/early/2016/12/09/1613169114.abstract %R 10.1073/pnas.1613169114 %0 Journal Article %J Limnology and Oceanography %D 2016 %T Spatial and temporal dynamics of nano- and pico-size particulate organic matter (POM) in a coastal megatidal marine system %A Moynihan, Molly A. %A Pierrick Barbier %A Frédéric Olivier %A Nicolas Toupoint %A Tarik Meziane %XSurface water samples of size-selected seston (0.7–20 μm) were collected from April 2013 to September 2013 at three similar coarse-sand benthic habitats. Additionally, seston sampling was performed at a fixed location throughout a complete tidal cycle (2014). A combination of fatty acid (FA), isotope, and flow cytometry analyses were used to determine the quality and quantity of nano- and pico-sized particulate organic matter (POM). High variability was found between fatty acid replicate samples. Similar temporal patterns were observed at two sheltered sites, while the exposed site displayed less pronounced seasonal changes. Lower concentrations of 16C and 18C polyunsaturated fatty acids were found during low tide sampling. Globally, POM was dominated by picoeukaryotes, with concentrations exceeding 50,000 cells mL−1, and (16:4ω3 + 18:3ω3)/Σω3 is proposed as novel biomarker of picoeukaryotes in this region.
%B Limnology and Oceanography %V 61 %P 1087-1100 %8 05/2016 %G eng %U http://dx.doi.org/10.1002/lno.10276 %N 3 %R 10.1002/lno.10276 %0 Journal Article %J Scientific Reports %D 2016 %T Validation of trophic and anthropic underwater noise as settlement trigger in blue mussels %A Jolivet, Aurélie %A Réjean Tremblay %A Frédéric Olivier %A Gervaise, Cédric %A Rémi Sonier %A Genard, Bertrand %A Laurent Chauvaud %B Scientific Reports %V 6 %P 33829 %G eng %0 Journal Article %J Revista de Biologia Tropical %D 2016 %T Which factors determine the altitudinal distribution of tropical Andean riverine fishes? %A E. De La Barra %A J. Zubieta %A G. Aguilera %A M. Maldonado %A Marc Pouilly %A Thierry Oberdorff %XAbstract: Which factors determine the altitudinal distribution of tropical Andean riverine fishes?
Altitudinal gradients represent an appropriate system to assess whether there is a relationship between richness patterns, environmental variables, and the ecological processes that determine the species type and number inhabiting a given area. In mountain streams freshwater fishes, the most prevalent relationship is a monotonic decrease in species richness with elevation. The objective of this study was to evaluate four hypotheses that can explain the negative relationship between local fish species richness and altitude, 1) the hypothesis of decreasing energy availability, 2) the hypothesis of increasing climate severity, 3) the hypothesis of habitat diversity, and 4) the hypothesis of isolation by physical severity of the environment. Fish and macro-invertebrates were col- lected following standard methods from 83 sites (between 200-4 000 meters) of two river basins in the Bolivian Amazon. The first hypothesis was tested by analyzing relationships between the density of macro-invertebrates, the richness of invertivorous fish species and altitude; while the second and third hypotheses were assessed by a multiple regression analysis (GLM) between fish species richness and several local and regional factors. Besides, assemblage dissimilarity between sites along the altitudinal gradient was analyzed using βsim and βness indices. Fish richness decreases linearly with increasing altitude. The density of macro-invertebrates tends to increase at higher altitudes, contrary to invertivorous fish species richness, suggesting that energy availability is not a limiting factor for fish species colonization. The GLM explained 86 % of the variation in fish species richness, with a significant contribution of water temperature, maximum slope in the river mainstem, and stream width. There is a higher species turnover (βsim) between sites at low elevation. Inversely, βness shows higher values in the upper parts, corresponding to change in assemblages mainly due to species loss. Taken together, these results suggest that climatic and physical severities create strong barriers to colonization, further explaining the decrease in fish richness along the altitudinal gradient.
%B Revista de Biologia Tropical %V 64 %P 173-192 %8 03/2016 %G eng %N 1 %0 Journal Article %J Biological Invasions %D 2016 %T Worldwide freshwater fish homogenization is driven by a few widespread non-native species %A A. Toussaint %A O. Beauchard %A Thierry Oberdorff %A S. Brosse %A S. Villéger %XIntroduction of non-native species have changed the composition of freshwater fish assem- blages throughout the world and hence the dissimilar- ity between them, either toward homogenization (i.e. decrease in dissimilarity) or differentiation (i.e. increase in dissimilarity). However, there is still no assessment of individual contributions of non-native species to this overall trend at the global scale. Here, we disentangle individual non-native species effect from the global effect of the whole introduced species pool at the biogeographic realm scale and test which determinant can explain the effect of non-native species on changes in assemblage dissimilarity. Our results show that the contribution of introduced species on changes in dissimilarity is highly variable and all directions of changes are observed through the introduction process, i.e. either toward homogeniza- tion, differentiation or no change. Overall, only a few widespread species contribute to the worldwide homogenization pattern, whereas most of introduced species slightly contribute to the global change in dissimilarity. The effect of species on change in dissimilarity was influenced by the introduction pres- sure but also by whether introduced species were translocated (i.e. introduced to other basins within their biogeographic realm) or exotic (i.e. introduced from other biogeographic realms). Homogenization is strongly determined by the species translocated within a realm and only by few widespread exotic species whereas the majority of exotics contribute to a differentiation effect. Nevertheless, under future intensified human pressure, the exotic species spread across realms is predicted to increase and their differentiation effect might turn towards homogeniza- tion, and might trigger the global homogenization trend.
%B Biological Invasions %G eng %R DOI 10.1007/s10530-016-1067-8 %0 Conference Proceedings %B Proceedings of the Congress on artificial reefs : from materials to ecosystems %D 2015 %T Artificial reef: Multiscale monitoring of colonization and primary production - Récif artificiel: mise en place d’un suivi de la colonisation a plusieurs échelles %A Pascal Claquin %A Leroy, Fanny %A Anne-Marie Rusig %A Isabelle Mussio %A Eric Feunteun %A Foveau, Aurélie %A Jean-Claude Dauvin %A Régis Gallon %A Lebrun, J-L %A Lestarquit, Mabel %A Francis Orvain %A Anne-Sophie Martinez %A Desoche, E %A Napoléon, Camille %A Roussel, Déborha %A Boutoil, Mohamed %B Proceedings of the Congress on artificial reefs : from materials to ecosystems %7 M. Boutouil & S. Leboulanger %C ESITC Caen %V 1 %P 103-110 %8 01/2015 %@ 978-2-95517664-0-5 %G eng %6 1 %0 Journal Article %J Progress in Oceanography %D 2015 %T Biodiversity and distribution of leptocephali west of the Mascarene Plateau in the southwestern Indian Ocean %A Miller, M.J. %A Eric Feunteun %A Aoyama, J. %A Watanabe, S. %A Kuroki, M. %A Lecomte-Finiger, R. %A Minegishi, Y. %A Robinet, T. %A Réveillac, E. %A Gagnaire, P.-A. %A Berrebi, P. %A Tsukamoto, K. %A Otake, T. %B Progress in Oceanography %V 137 %P 84-102 %G eng %U https://www.sciencedirect.com/science/article/pii/S0079661115001317 %R 10.1016/j.pocean.2015.05.026 %0 Journal Article %J Mol Ecol Resour %D 2015 %T Bushmeat genetics: setting up a reference framework for the DNA typing of African forest bushmeat. %A Gaubert, Philippe %A Njiokou, Flobert %A Olayemi, Ayodeji %A Pagani, Paolo %A Dufour, Sylvain %A Danquah, Emmanuel %A Nutsuakor, Mac Elikem K %A Ngua, Gabriel %A Missoup, Alain-Didier %A Pablo Tedesco %A Dernat, Rémy %A Antunes, Agostinho %XThe bushmeat trade in tropical Africa represents illegal, unsustainable off-takes of millions of tons of wild game - mostly mammals - per year. We sequenced four mitochondrial gene fragments (cyt b, COI, 12S, 16S) in >300 bushmeat items representing nine mammalian orders and 59 morphological species from five western and central African countries (Guinea, Ghana, Nigeria, Cameroon and Equatorial Guinea). Our objectives were to assess the efficiency of cross-species PCR amplification and to evaluate the usefulness of our multilocus approach for reliable bushmeat species identification. We provide a straightforward amplification protocol using a single 'universal' primer pair per gene that generally yielded >90% PCR success rates across orders and was robust to different types of meat preprocessing and DNA extraction protocols. For taxonomic identification, we set up a decision pipeline combining similarity- and tree-based approaches with an assessment of taxonomic expertise and coverage of the GENBANK database. Our multilocus approach permitted us to: (i) adjust for existing taxonomic gaps in GENBANK databases, (ii) assign to the species level 67% of the morphological species hypotheses and (iii) successfully identify samples with uncertain taxonomic attribution (preprocessed carcasses and cryptic lineages). High levels of genetic polymorphism across genes and taxa, together with the excellent resolution observed among species-level clusters (neighbour-joining trees and Klee diagrams) advocate the usefulness of our markers for bushmeat DNA typing. We formalize our DNA typing decision pipeline through an expert-curated query database - DNAbushmeat - that shall permit the automated identification of African forest bushmeat items.
%B Mol Ecol Resour %V 15 %P 633-651 %8 2014 Sep 26 %G eng %R 10.1111/1755-0998.12334 %0 Conference Proceedings %B Proceedings of the Congress on artificial reefs : from materials to ecosystems %D 2015 %T Chemical interaction between epilitic microphytobenthic biofilm and larval development of the sea urchin Paracentrotus lividus %A Francis Orvain %A Anne-Sophie Martinez %A Desoche, E %A Pascal Claquin %B Proceedings of the Congress on artificial reefs : from materials to ecosystems %7 M. Boutouil & S. Leboulanger %C ESITC Caen %V 1 %P 239-247 %8 01/2015 %@ 978-2-95517664-0-5 %G eng %6 1 %0 Journal Article %J Marine Ecology Progress Series %D 2015 %T Dietary tracers in Bathyarca glacialis from contrasting trophic regions in the Canadian Arctic %A Gaillard, B %A Tarik Meziane %A Réjean Tremblay %A P Archambault %A Layton, KKS %A Martel, AL %A Frédéric Olivier %K Bathyarca glacialis %K Bivalve %K Canadian Arctic Archipelago %K FATMs %K Fatty acid trophic markers %K Non-methylene-interrupted fatty acid %K Pelagic – benthic coupling %B Marine Ecology Progress Series %V 536 %P 175-186 %8 09/2015 %G eng %0 Journal Article %J Diversity and Distributions %D 2015 %T From current distinctiveness to future homogeneization of the world’s freshwater fish faunas %A S. Villéger %A S. Blanchet %A O. Beauchard %A Thierry Oberdorff %A S. Brosse %B Diversity and Distributions %V 21 %P 223-235 %8 02/2015 %G eng %N 2 %R DOI: 10.1111/ddi.12242 %0 Journal Article %J Biological Journal of the Linnean Society %D 2015 %T Genetic variation among Corsican and continental populations of the Eurasian treecreeper (Aves: Certhia familiaris) reveals the existence of a palaeoendemic mitochondrial lineage %A Jean-Marc Pons %A Jean-Claude Thibault %A Jérôme Fournier %A Georges Olioso %A Marko Rakovic %A Guido Tellini Florenzano %A Jérôme Fuchs %XIn this study we investigated the phylogenetics of the Eurasian treecreeper (Certhia familiaris), a forest passerine with a wide Palaearctic range including Corsica, using three mitochondrial genes and three nuclear introns, and
its phylogeographic history using the COI gene. Our phylogenetic results, including eight of the ten sub-species currently recognized, support the monophyly of C. familiaris with respect to its Indo-Asian sister species
C. hodgsoni. C. familiaris comprises two lineages that diverged during the mid-Pleistocene (c. 1 Myr): one palaeoendemic lineage has an allopatric range nowadays restricted to the Corsica island and the Caucasus region
whereas the second one, more recent and widespread, is distributed over most of Eurasia and in northern China. The most likely scenario that may explain such a pattern is a double colonization of the western Palaearctic from
the eastern range of the species. During the middle Pleistocene period, a first lineage expanded its range up into Europe but did not persist through glacial cycles except in Corsica and the Caucasus region. Later, during the
upper Pleistocene, a second lineage began to diversify around 0.09 Myr, spreading towards the western Palaearctic from a unique refuge likely located in the eastern Palaearctic [correction added on 6 March 2015 after first online
publication: 0.9 Myr amended to 0.09 Myr]. Apart from C. f. corsa, our results do not suggest any distinct evolutionary history for other sub-species previously described on morphological grounds in Europe. Our study
highlights the important conservation value of the Corsican treecreeper and emphasizes the major role of mature pine forests in the evolution of endemic bird taxa in Corsica.
Since the early 1980s, the population of European eels (Anguilla anguilla) has dramatically declined. Nowadays, the European eel is listed on the red list of threatened species (IUCN Red List) and is considered as critically endangered of extinction. Pollution is one of the putative causes for the collapse of this species. Among their possible effects, contaminants gradually accumulated in eels during their somatic growth phase (yellow eel stage) would be remobilized during their reproductive migration leading to potential toxic events in gonads. The aim of this study was to investigate the effects of organic and inorganic contaminants on the gonad development of wild female silver eels. Female silver eels from two sites with differing contamination levels were artificially matured. Transcriptomic analyses by means of a 1000 candidate gene cDNA microarray were performed on gonads after 11weeks of maturation to get insight into the mechanisms of toxicity of contaminants. The transcription levels of several genes, that were associated to the gonadosomatic index (GSI), were involved in mitotic cell division but also in gametogenesis. Genes associated to contaminants were mainly involved in the mechanisms of protection against oxidative stress, in DNA repair, in the purinergic signaling pathway and in steroidogenesis, suggesting an impairment of gonad development in eels from the polluted site. This was in agreement with the fact that eels from the reference site showed a higher gonad growth in comparison to contaminated fish.
%B Chemosphere %V 139 %P 303-309 %8 2015 Jul 6 %G eng %R 10.1016/j.chemosphere.2015.06.007 %0 Journal Article %J Journal of Experimental Biology and ecology %D 2015 %T Impact of sediment grain-size and biofilm age on epipelic microphytobenthos resuspension %A Martin Ubertini %A Sébastien Lefebvre %A Rakotomalala, C %A Francis Orvain %B Journal of Experimental Biology and ecology %V 467 %P 52-64 %8 03/2015 %G eng %9 Journal article %0 Journal Article %J Ecological Modelling %D 2015 %T Modelling the effect of Cerastoderma edule bioturbation on microphytobenthos resuspension towards the planktonic food web of estuarine ecosystem %A Rakotomalala, C %A Karine Grangeré %A Martin Ubertini %A Forêt, M %A Francis Orvain %XMicrophytobenthos (MPB) represents an important food source for primary consumers in estuarine ecosystems and the availability of MPB as food items results from complex physical, chemical, and biological interactions. In Baie des Veys (Lower Normandy, France), the common cockle Cerastoderma edule constitutes the major bioturbator in the ecosystem in terms of biomass. In this ecosystem, cockle bioturbation is a key process regulating the MPB erosion flux in the water column. This bivalve intensely modifies the top layer of the sediment by increasing the sediment erodibility and the fluxes of suspended chlorophyll a through the valve movements. More precisely, cockle bioturbation destabilizes the sediment surface by creating a biogenic layer that is easily eroded with tidal hydrodynamic forces. Associated MPB can then be exported to the water column to fuel higher trophic levels of the planktonic food web. The aim of this study was to develop a numerical model that reproduces the export of MPB associated to the biogenic layer erosion. Kinetics of suspended MPB, in response to increasing stress, were obtained from flume experiments in lab controlled conditions and in situ natural conditions. Following this, the suspended MPB were analyzed to respectively parameterize the model by (1) a calibration approach, and (2) an independent validation. The analysis has highlighted that the higher the biomass of cockles, the higher the MPB resuspension rates. Our model consistently reproduces the tendency encountered in laboratory analysis and with in situ natural conditions. During the validation, a small site-specific lack of adjustment was identified, but, among the macrozoobenthic community, the model can be significantly improved by considering the bioturbation activities of another ecosystem engineer, Pygospio elegans. This study thus provides reliable estimates of the daily food availability from benthic primary consumers in an estuarine system where cockles dominate the bioturbating assemblage. This model can be inserted in various model designs (0D, 1D-vertical or 3D).
%B Ecological Modelling %V 316 %P 155-167 %8 09/2015 %G eng %0 Journal Article %J Ecography %D 2015 %T Multi-causality and spatial non-stationarity in the determinants of groundwater crustacean diversity in Europe %A D. Eme %A M. Zagmajster %A C. Fiser %A D. Galassi %A P. Marmonier %A F. Stoch %A J. F. Cornu %A Thierry Oberdorff %A F. Malard %B Ecography %V 38 %P 531–540 %8 05/2015 %G eng %N 5 %9 Research %0 Journal Article %J Journal of Applied Ichthytology %D 2015 %T Opinion Paper: how vulnerable are Amazonian freshwater fishes to ongoing climate change? %A Thierry Oberdorff %A Jézéquel, Céline %A Campero, Melina %A Carvajal-Vallejos, Fernando %A Cornu, Jean-François %A Dias, Murilo S %A Fabrice Duponchelle %A Maldonado, Mabel %A H. Ortega %A Renno, Jean-Francois %A Pablo Tedesco %B Journal of Applied Ichthytology %V 31 %P 4-9 %G eng %0 Journal Article %J Journal of Applied Ichthyology %D 2015 %T Opinion Paper: how vulnerable are Amazonian freshwater fishes to ongoing climate change? %A Thierry Oberdorff %A C. Jézéquel %A M. Campero %A F. Carvajal-Vallejos %A J.F. Cornu %A M.S. Dias %A Fabrice Duponchelle %A J.A. Maldonado-Ocampo %A H. Ortega %A J.F. Renno %A Pablo Tedesco %XWith around 15% of all described freshwater fish species in the world, the Amazon Basin is by far the most fish species- rich freshwater ecosystem on the planet. In this opinion paper, a rough evaluation is given on just how vulnerable Amazonian freshwater fishes are to ongoing climate change. And to argue that current anthropogenic threats through rapid expansion of human infrastructure and economic activ- ities in the basin could be a far greater threat to fish commu- nities than those anticipated by any future climate change. Conservation actions in the Amazon Basin should focus preferentially on reducing the impacts of present-day anthro- pogenic threats.
%B Journal of Applied Ichthyology %V 31 %P 4-9 %G eng %N (Suppl. 4) %R doi: 10.1111/jai.12971 %0 Journal Article %J Royal Society Open Science %D 2015 %T The potential for climate-driven bathymetric range shifts: sustained temperature and pressure exposures on a marine ectotherm, Palaemonetes varians %A Morris, J. P. %A Thatje, S. %A Cottin, D. %A Oliphant, A. %A Brown, A. %A Bruce Shillito %A Juliette Ravaux %A Hauton, C. %B Royal Society Open Science %V 2 %P 150472 %8 Jan-11-2015 %G eng %U https://royalsocietypublishing.org/doi/10.1098/rsos.150472 %N 11 %! R. Soc. open sci. %R 10.1098/rsos.150472 %0 Journal Article %J Aquatic Sciences %D 2015 %T Stable isotopes reveal food web modifications along the upstream– downstream gradient of a temperate stream %A N. Hette %A Jérôme Belliard %A E. Tales %A Thierry Oberdorff %XABSTRACT: The upstream–downstream gradient (UDG) is a key feature of streams. For instance food webs are assumed to change from upstream to downstream. We tested this hypothesis in a small European river catchment (937 km 2), and examined whether food web modifications are related to structural (i.e. food web composition) or functional changes (i.e. alteration of linkages within the web). We adopted a double approach at two levels of organisation (assemblage and species levels) using two isotopic metrics (isotopic space area and isotopic niche overlap), and proposed a new hypothesis-testing framework for exploring the dominant feeding strategy within a food web. We confirmed that the UDG influenced stream food webs, and found that food web modifications were related to both structural and functional changes. The structural change was mainly related to an increase in species richness, and induced functional modifications of the web (indirect effect). In addition, the UDG also modified the functional features of the web directly, without changing the web composition. The proposed framework allowed relating the direct effect of the UDG to a diet specialisation of the species, and the indirect effect via the structural changes to a generalist feeding strategy. The framework highlights the benefits of conducting the double approach, and provides a foundation for future studies investigating the dominant feeding strategy that underlies food web modifications.
%B Aquatic Sciences %G eng %R DOI 10.1007/s00027-015-0421-8 %0 Journal Article %J Progress in Oceanography %D 2015 %T Stable isotopic composition of anguilliform leptocephali and other food web components from west of the Mascarene Plateau %A Eric Feunteun %A Miller, M.J. %A Alexandre Carpentier %A Aoyama, J. %A Christine Dupuy %A Kuroki, M. %A Pagano, M. %A Réveillac, E. %A Sellos, D. %A Watanabe, S. %A Tsukamoto, K. %A Otake, T. %B Progress in Oceanography %V 137 %P 69-83 %G eng %U https://www.sciencedirect.com/science/article/pii/S0079661115001299 %R 10.1016/j.pocean.2015.05.024 %0 Journal Article %J Journal of Applied Ichthyology %D 2015 %T Variations in reproductive strategy of the silver Arowana, Osteoglossum bicirrhosum Cuvier, 1829 from four sub-basins of the Peruvian Amazon %A Fabrice Duponchelle %A Ruiz-Arce Adela %A Waty, A. %A García-Vasquez, Aurea %A Renno, J-F %A Chu-Koo, F %A García-Dávila, C. %A Vargas, Gladys %A Salvador Tello %A Ortiz, A. %A Pinedo, R. %A Manzanares Vásquez, R. %A Jesus Nuñez-Rodriguez %B Journal of Applied Ichthyology %V 31 %P 19-30 %G eng %0 Journal Article %J Revista de Biolog{ía Tropical/International Journal of Tropical Biology and Conservation %D 2015 %T Which factors determine the altitudinal distribution of tropical Andean riverine fishes? %A De La Barra, Evans %A Zubieta, José %A Aguilera, Gastón %A Maldonado, Mabel %A Marc Pouilly %A Oberdorff, Thierry %B Revista de Biolog{ía Tropical/International Journal of Tropical Biology and Conservation %V 64 %P 157–176 %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Bacterial dynamics in a microphytobenthic biofilm: A tidal mesocosm approach %A Hélène Agogué %A Clarisse Mallet %A Francis Orvain %A Margot de Crignis %A Françoise Mornet %A Christine Dupuy %B Journal of Sea Research %V 92 %P 144-157 %8 09/2014 %G eng %0 Journal Article %J Invert Neurosci %D 2014 %T Cephalopods in neuroscience: regulations, research and the 3Rs. %A Fiorito, Graziano %A Affuso, Andrea %A Anderson, David B %A Basil, Jennifer %A Laure Bonnaud-Ponticelli %A Botta, Giovanni %A Cole, Alison %A D'Angelo, Livia %A De Girolamo, Paolo %A Dennison, Ngaire %A Dickel, Ludovic %A Di Cosmo, Anna %A Di Cristo, Carlo %A Gestal, Camino %A Fonseca, Rute %A Grasso, Frank %A Kristiansen, Tore %A Kuba, Michael %A Maffucci, Fulvio %A Manciocco, Arianna %A Mark, Felix Christopher %A Melillo, Daniela %A Osorio, Daniel %A Palumbo, Anna %A Perkins, Kerry %A Ponte, Giovanna %A Raspa, Marcello %A Shashar, Nadav %A Smith, Jane %A Smith, David %A Sykes, António %A Villanueva, Roger %A Tublitz, Nathan %A Zullo, Letizia %A Andrews, Paul %K 3Rs %K Animal welfare %K Cephalopods %K Directive2010/63/EU %K Neuroscience %XCephalopods have been utilised in neuroscience research for more than 100 years particularly because of their phenotypic plasticity, complex and centralised nervous system, tractability for studies of learning and cellular mechanisms of memory (e.g. long-term potentiation) and anatomical features facilitating physiological studies (e.g. squid giant axon and synapse). On 1 January 2013, research using any of the about 700 extant species of "live cephalopods" became regulated within the European Union by Directive 2010/63/EU on the "Protection of Animals used for Scientific Purposes", giving cephalopods the same EU legal protection as previously afforded only to vertebrates. The Directive has a number of implications, particularly for neuroscience research. These include: (1) projects will need justification, authorisation from local competent authorities, and be subject to review including a harm-benefit assessment and adherence to the 3Rs principles (Replacement, Refinement and Reduction). (2) To support project evaluation and compliance with the new EU law, guidelines specific to cephalopods will need to be developed, covering capture, transport, handling, housing, care, maintenance, health monitoring, humane anaesthesia, analgesia and euthanasia. (3) Objective criteria need to be developed to identify signs of pain, suffering, distress and lasting harm particularly in the context of their induction by an experimental procedure. Despite diversity of views existing on some of these topics, this paper reviews the above topics and describes the approaches being taken by the cephalopod research community (represented by the authorship) to produce "guidelines" and the potential contribution of neuroscience research to cephalopod welfare.
%B Invert Neurosci %V 14 %P 13-36 %8 2014 Mar %G eng %N 1 %1 http://www.ncbi.nlm.nih.gov/pubmed/24385049?dopt=Abstract %R 10.1007/s10158-013-0165-x %0 Journal Article %J Aquaculture Nutrition %D 2014 %T The effect of dietary oxidized lipid levels on growth performance, antioxidant enzyme activities, intestinal lipid deposition and skeletogenesis in Senegalese sole (Solea senegalensis) larvae %A Boglino, A %A Darias, Maria %A Estévez, A %A Andree, K B %A Sarasquete, Carmen %A Ortiz-Delgado, Juan Bosco %A Solé, M %A Gisbert, E %K antioxidant enzymes %K lipid peroxidation %K live prey enrichment %K skeletogenesis %K Solea senegalensis larvae %K vitamin E %XFish tissues, particularly rich in n-3 PUFA, are prone to lipid peroxidation that can damage cellular membranes, cause severe lesions and subsequently incidences of disease and mortality. However, fish possess antioxidant defences, such as vitamin E (VE) and antioxidant enzymes, to protect them against oxidative damage. This study investigated the effects of an increasing gradient of oxidized dietary lipid on the survival, growth performance, skeletogenesis and antioxidant defensive processes occurring in Senegalese sole (Solea senegalensis) larvae. Four groups of fish were fed live prey enriched with experimental emulsions containing an increasing gradient of oxidized oil: non-oxidized, NO+VE, 34.5 nmol MDA g−1 w.w.; mildly oxidized, MO+VE, 43.1 nmol MDA g−1 w.w.; highly oxidized, HO+VE, 63.3 nmol MDA g−1 w.w. and highly oxidized without VE, HO-VE, 78.8 nmol MDA g−1 w.w. The oxidation levels increased in enriched rotifers following the oxidation gradient of the emulsions, but were not affected in enriched Artemia metanauplii. The oxidation status of Senegalese sole larvae increased during development, but this was not related to the dietary treatments. The increasing dietary oxidation levels did not affect the fatty acid profile, survival, growth performance and metamorphosis processes of sole larvae. Senegalese sole seem to activate antioxidant defence mechanisms in response to the increasing amounts of dietary peroxidized lipids, in a manner efficiently enough to prevent detection of any alterations of these physiological processes. Antioxidant systems and detoxification mechanisms appeared to occur through the consumption of dietary α-tocopherol, the activation of the antioxidant enzymes (catalase, superoxide dismutase, glutathione S-transferase, glutathione reductase) and the retention of oxidized fat in the intestinal enterocytes for detoxification prior to their utilization. However, fish fed the highest oxidized diet presented a reduction in bone mineralization, but lower incidence of deformities in the vertebral and caudal regions than fish fed the other diets. This study exemplifies the importance of rearing Senegalese sole larvae on non-oxidized diets during the early larval development to avoid detrimental consequences in older fish, most notably in the process of skeletogenesis.
%B Aquaculture Nutrition %V 20 %P 692–711 %G eng %U http://dx.doi.org/10.1111/anu.12123 %R 10.1111/anu.12123 %0 Journal Article %J Hyrobiologia %D 2014 %T Fish-AMAZBOL: a database on freshwater fishes of the Bolivian Amazon %A Carvajal-Vallejos, F M %A Rémy Bigorne %A Zeballos Fernandez, América J. %A Sarmiento, Jaime %A Barrera Soraya %A Yunoki, T %A Marc Pouilly %A Zubieta José %A De La Barra, Evans %A Michel Jégu %A Maldonado, Mabel %A Van Damme, Paul %A Céspedes, Ricardo %A Thierry Oberdorff %K Amazon River basin %K Bolivia %K Checklist %K Freshwater fishes %K Madera River %K South America %X The Bolivian part of the Amazon Basin contains a mega diverse and well-preserved fish fauna. Since the last decade, this fish fauna has received an increasing attention from scientists and the national authorities as fishes represent one of the most important sources of proteins for local human communities. However, this fish fauna still remains poorly documented. Here, we present a database for fishes from the Bolivian Amazon. To build the database, we conducted an extensive literature survey of native and non-native (exotic) fishes inhabiting all major sub-drainages of the Bolivian Amazon. The database, named Fish-AMAZBOL, contains species lists for 13 Amazonian hydrological units, covering 100% of the Bolivian Amazon and approximately 65% (722,137 km2) of the all territory. Fish-AMAZBOL includes 802 valid species, 12 of them being non-native, that have been checked for systematic reliability and consistency. To put this number in perspective, this represents around 14% of the all Neotropical ichthyofauna and around 6% of all strictly freshwater fishes inhabiting the planet. This database is currently the most comprehensive database of native and non-native fish species richness available so far for the Bolivian Amazon. %B Hyrobiologia %V 732 %P pp. 19-27 %8 07/2014 %G eng %U http://link.springer.com/article/10.1007/s10750-014-1841-5 %N 1 %R 10.1007/s10750-014-1841-5 %0 Journal Article %J Ecol Lett %D 2014 %T Global imprint of historical connectivity on freshwater fish biodiversity. %A Dias, Murilo S %A Thierry Oberdorff %A Bernard Hugueny %A Leprieur, Fabien %A Jézéquel, Céline %A Cornu, Jean-François %A Brosse, Sébastien %A Grenouillet, Gael %A Pablo Tedesco %K Animals %K Biodiversity %K Environment %K Fishes %K Fresh Water %K Models, Biological %XThe relative importance of contemporary and historical processes is central for understanding biodiversity patterns. While several studies show that past conditions can partly explain the current biodiversity patterns, the role of history remains elusive. We reconstructed palaeo-drainage basins under lower sea level conditions (Last Glacial Maximum) to test whether the historical connectivity between basins left an imprint on the global patterns of freshwater fish biodiversity. After controlling for contemporary and past environmental conditions, we found that palaeo-connected basins displayed greater species richness but lower levels of endemism and beta diversity than did palaeo-disconnected basins. Palaeo-connected basins exhibited shallower distance decay of compositional similarity, suggesting that palaeo-river connections favoured the exchange of fish species. Finally, we found that a longer period of palaeo-connection resulted in lower levels of beta diversity. These findings reveal the first unambiguous results of the role played by history in explaining the global contemporary patterns of biodiversity.
%B Ecol Lett %V 17 %P 1130-40 %8 2014 Sep %G eng %N 9 %1 http://www.ncbi.nlm.nih.gov/pubmed/25039890?dopt=Abstract %R 10.1111/ele.12319 %0 Journal Article %J Animal %D 2014 %T Histological development of the digestive system of the Amazonian pimelodid catfish Pseudoplatystoma punctifer. %A Gisbert, E %A Moreira, C %A Castro-Ruiz, D %A Oztürk, S %A Fernández, C %A Gilles, S %A Jesus Nuñez-Rodriguez %A Fabrice Duponchelle %A Salvador Tello %A Renno, J F %A García-Dávila, C %A Darias, Maria %XThe organogenesis of the digestive system was described in the Amazonian pimelodid catfish species Pseudoplatystoma punctifer from hatching (3.5 mm total length, TL) to 41 days post-fertilization (dpf) (58.1 mm TL) reared at 28°C. Newly hatched larvae showed a simple digestive tract, which appeared as a straight undifferentiated and unfolded tube lined by a single layer of columnar epithelial cells (future enterocytes). During the endogenous feeding period, comprised between 20 and 96 h post-fertilization (3.5 to 6.1 mm TL), the larval digestive system experienced a fast transformation with the almost complete development and differentiation of most of digestive organs (buccopahrynx, oesophagus, intestine, liver and exocrine pancreas). Yolk reserves were not completely depleted at the onset of exogenous feeding (4 dpf, 6.1 mm TL), and a period of mixed nutrition was observed up to 6 to 7 dpf (6.8 to 7.3 mm TL) when yolk was definitively exhausted. The stomach was the organ that latest achieved its complete differentiation, characterized by the development of abundant gastric glands in the fundic stomach between 10 and 15 dpf (10.9 to 15.8 mm TL) and the formation of the pyloric sphincter at the junction of the pyloric stomach and the anterior intestine at 15 dpf (15.8 mm TL). The above-mentioned morphological and histological features observed suggested the achievement of a digestive system characteristic of P. punctifer juveniles and adults. The ontogeny of the digestive system in P. punctifer followed the same general pattern as in most Siluriform species so far, although some species-specific differences in the timing of differentiation of several digestive structures were noted, which might be related to different reproductive guilds, egg and larval size or even different larval rearing practices. According to present findings on the histological development of the digestive system in P. punctifer, some recommendations regarding the rearing practices of this species are also provided in order to improve the actual larval rearing techniques of this fast-growing Neotropical catfish species.
%B Animal %V 8 %P 1765-76 %8 2014 Nov %G eng %N 11 %1 http://www.ncbi.nlm.nih.gov/pubmed/25045855?dopt=Abstract %R 10.1017/S1751731114001797 %0 Journal Article %J Global Ecology and Biogeography %D 2014 %T Historical assemblage distinctiveness and the introduction of widespread non-native species explain worldwide change in freshwater fish taxonomic dissimilarity %A A. Toussaint %A O. Beauchard %A Thierry Oberdorff %A S. Brosse %A S. Villéger %B Global Ecology and Biogeography %V 23 %P 574-584 %8 05/2014 %G eng %N 5 %R DOI: 10.1111/geb.12141 %0 Journal Article %J Global Ecology and Biogeography %D 2014 %T Historical assemblage distinctiveness and the introduction of widespread non-native species explain worldwide change in freshwater fish taxonomic dissimilarity %A A. Toussaint %A O. Beauchard %A Thierry Oberdorff %A S. Brosse %B Global Ecology and Biogeography %V 23 %P 574-584 %8 05/2014 %G eng %N 5 %R DOI: 10.1111/geb.12141 %0 Journal Article %J Journal of Sea Research %D 2014 %T How does the resuspension of the biofilm alter the functioning of the benthos-pelagos coupled food web of a bare mudflat in Marennes-Oléron Bay (NE Atlantic)? %A Saint-Béat, B. %A Christine Dupuy %A Agogué, H. %A Alexandre Carpentier %A Chalumeau, J. %A Como, S. %A David, V. %A De Crignis, M. %A Duchêne, J.-C. %A Fontaine, C. %A Eric Feunteun %A Katell Guizien %A Hartmann, H. %A Lavaud, J. %A Sébastien Lefebvre %A Lefrançois, C. %A Mallet, C. %A Montanié, H. %A Mouget, J.-L. %A Francis Orvain %A Ory, P. %A Pascal, P.-Y. %A Radenac, G. %A Richard, P. %A Vézina, A.F. %A Nathalie Niquil %B Journal of Sea Research %V 92 %P 144-157 %G eng %U https://www.sciencedirect.com/science/article/pii/S138511011400029X %R 10.1016/j.seares.2014.02.003 %0 Journal Article %J BioScience %D 2014 %T Interacting Regional Scale Regime Shifts for Biodiversity and Ecosystem Services %A P. Leadley %A V. Proença %A Juan F. Fernández-Manjarrés %A H.M. Pereira %A R. Alkemade %A R. Biggs %A E. Bruley %A W. Cheung %A D. Cooper %A J. Figueiredo %A E. Gilman %A S. Guénette %A G. Hurtt %A C. Mbow %A Thierry Oberdorff %A C. Revenga %A J. Scharlemann %A R. Scholes %A M. Stafford-Smith %A R. Sumaila %A M. Walpole %B BioScience %V 64 %P 665-679 %8 08/2014 %G eng %N 8 %R doi: 10.1093/biosci/biu093 %0 Journal Article %J Marine biology %D 2014 %T Irreplaceable area extends marine conservation hotspot off Tunisia: insights from GPS-tracking Scopoli’s shearwaters from the largest seabird colony in the Mediterranean %A Grémillet, David %A Clara Péron %A Pons, Jean-Baptiste %A Ouni, Rhida %A Authier, Matthieu %A Thévenet, Matthieu %A Fort, Jérôme %B Marine biology %V 161 %P 2669–2680 %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Multiscale patterns in the diversity and organization of benthic intertidal fauna among French Atlantic estuaries %A Hugues Blanchet %A Benoît Gouillieux %A Sandrine Alizier %A Jean-Michel Amouroux %A Guy Bachelet %A Anne-Laure Barillé %A Jean-Claude Dauvin %A Xavier de Montaudouin %A Valérie Derolez %A Nicolas Desroy %A Jacques Grall %A Antoine Grémare %A Pascal Hacquebart %A Jérôme Jourde %A Céline Labrune %A Nicolas Lavesque %A Antoine Meirland %A Thiebaut Nebout %A Frédéric Olivier %A Corine Pelaprat %A Thierry Ruellet %A Pierre-Guy Sauriau %A Sébastien Thorin %K Diversity %K Estuaries %K Macrozoobenthos %K Structuring Factors %K WFD %XBased on a parallel sampling conducted during autumn 2008, a comparative study of the intertidal benthic macrofauna among 10 estuarine systems located along the Channel and Atlantic coasts of France was performed in order to assess the level of fauna similarity among these sites and to identify possible environmental factors involved in the observed pattern at both large (among sites) and smaller (benthic assemblages) scales. More precisely this study focused on unraveling the observed pattern of intertidal benthic fauna composition and diversity observed at among-site scale by exploring both biotic and abiotic factors acting at the among- and within-site scales. Results showed a limited level of similarity at the among-site level in terms of intertidal benthic fauna composition and diversity. The observed pattern did not fit with existing transitional water classification methods based on fish or benthic assemblages developed in the frame of the European Water Framework Directive (WFD). More particularly, the coastal plain estuaries displayed higher among-site similarity compared to ria systems. These coastal plain estuaries were characterized by higher influence of river discharge, lower communication with the ocean and high suspended particulate matter levels. On the other hand, the ria-type systems were more dissimilar and different from the coastal plain estuaries. The level of similarity among estuaries was mainly linked to the relative extent of the intertidal “Scrobicularia plana–Cerastoderma edule” and “Tellina tenuis” or “Venus” communities as a possible consequence of salinity regime, suspended matter concentrations and fine particles supply with consequences on the trophic functioning, structure and organization of benthic fauna. Despite biogeographical patterns, the results also suggest that, in the context of the WFD, these estuaries should only be compared on the basis of the most common intertidal habitat occurring throughout all estuarine systems and that the \{EUNIS\} biotope classification might be used for this purpose. In addition, an original inverse relation between γ-diversity and area was shown; however, its relevance might be questioned.
%B Journal of Sea Research %V 90 %P 95 - 110 %8 07/2014 %G eng %U http://www.sciencedirect.com/science/article/pii/S1385110114000495 %R http://dx.doi.org/10.1016/j.seares.2014.02.014 %0 Journal Article %J BMC Genomics %D 2014 %T Neuropeptides encoded by the genomes of the Akoya pearl oyster Pinctata fucata and Pacific oyster Crassostrea gigas: a bioinformatic and peptidomic survey. %A Stewart, Michael J %A Pascal Favrel %A Rotgans, Bronwyn A %A Wang, Tianfang %A Zhao, Min %A Sohail, Manzar %A O'Connor, Wayne A %A Elizur, Abigail %A Joël Henry %A Cummins, Scott F %XBACKGROUND: Oysters impart significant socio-ecological benefits from primary production of food supply, to estuarine ecosystems via reduction of water column nutrients, plankton and seston biomass. Little though is known at the molecular level of what genes are responsible for how oysters reproduce, filter nutrients, survive stressful physiological events and form reef communities. Neuropeptides represent a diverse class of chemical messengers, instrumental in orchestrating these complex physiological events in other species.
RESULTS: By a combination of in silico data mining and peptide analysis of ganglia, 74 putative neuropeptide genes were identified from genome and transcriptome databases of the Akoya pearl oyster, Pinctata fucata and the Pacific oyster, Crassostrea gigas, encoding precursors for over 300 predicted bioactive peptide products, including three newly identified neuropeptide precursors PFGx8amide, RxIamide and Wx3Yamide. Our findings also include a gene for the gonadotropin-releasing hormone (GnRH) and two egg-laying hormones (ELH) which were identified from both oysters. Multiple sequence alignments and phylogenetic analysis supports similar global organization of these mature peptides. Computer-based peptide modeling of the molecular tertiary structures of ELH highlights the structural homologies within ELH family, which may facilitate ELH activity leading to the release of gametes.
CONCLUSION: Our analysis demonstrates that oysters possess conserved molluscan neuropeptide domains and overall precursor organization whilst highlighting many previously unrecognized bivalve idiosyncrasies. This genomic analysis provides a solid foundation from which further studies aimed at the functional characterization of these molluscan neuropeptides can be conducted to further stimulate advances in understanding the ecology and cultivation of oysters.
%B BMC Genomics %V 15 %P 840 %8 2014 %G eng %R 10.1186/1471-2164-15-840 %0 Journal Article %J Journal of Sea Research %D 2014 %T Organisms as cooperative ecosystem engineers in intertidal flats %A Passarelli, C %A Frédéric Olivier %A Paterson, D M %A Tarik Meziane %A Cédric Hubas %K Biogenic Structure %K Cooperative Ecosystem Engineers %K Habitat Cascade %K Sediment stability %K tidal flats %XThe importance of facilitative interactions and organismal ecosystem engineering for establishing the structure of communities is increasingly being recognised for many different ecosystems. For example, soft-bottom tidal flats host a wide range of ecosystem engineers, probably because the harsh physico-chemical environmental conditions render these species of particular importance for community structure and function. These environments are therefore interesting when focusing on how ecosystem engineers interact and the consequences of these interactions on community dynamics. In this review, we initially detail the influence on benthic systems of two kinds of ecosystem engineers that are particularly common in tidal flats. Firstly, we examine species providing biogenic structures, which are often the only source of habitat complexity in these environments. Secondly, we focus on species whose activities alter sediment stability, which is a crucial feature structuring the dynamics of communities in tidal flats. The impacts of these engineers on both environment and communities were assessed but in addition the interaction between ecosystem engineers was examined. Habitat cascades occur when one engineer favours the development of another, which in turn creates or modifies and improves habitat for other species. Non-hierarchical interactions have often been shown to display non-additive effects, so that the effects of the association cannot be predicted from the effects of individual organisms. Here we propose the term of “cooperative ecosystem engineering” when two species interact in a way which enhances habitat suitability as a result of a combined engineering effect. Finally, we conclude by describing the potential threats for ecosystem engineers in intertidal areas, potential effects on their interactions and their influence on communities and ecosystem function.
%B Journal of Sea Research %V 92 %P 92-101 %8 09/2014 %G eng %R 10.1016/j.seares.2013.07.010 %0 Book %D 2014 %T Peces de Bolivia/Bolivian Fishes %A Sarmiento, Jaime %A Rémy Bigorne %A Carvajal-Vallejos, F M %A Maldonado, Mabel %A Leciak, Elisabeth %A Thierry Oberdorff %XDesde la última década, el creciente interés por parte de científicos y autoridades nacionales ha dado lugar a avances considerables en el conocimiento de los peces de Bolivia, llegando a una lista de más de 900 especies. Esta riqueza representa el 7 % de todas las especies de agua dulce descritas en el mundo, haciendo de Bolivia uno de los países con mayor diversidad de peces.
Este libro, primero de su categoría en Bolivia, presenta una compilación de informaciones sobre una centena de especies de peces, entre las más conocidas o notables, incluyendo fotos, informaciones sobre sus rasgos biológicos y mapas de distribución.
Está dirigido a quienes quieren descubrir o conocer más sobre los peces de Bolivia y la biodiversidad en general. Esperamos que el presente trabajo resalte la necesidad de preservar la singularidad que representan las aguas bolivianas con su diversa fauna, y que ayude al pueblo boliviano a conocer mejor y valorar su patrimonio natural.
Since the last decade, an increasing attention from scientists and national authorities has led to significant advances in our knowledge of Bolivian fishes. To date, more than 900 fish species are known to inhabit Bolivian waters. This richness represents 7 % of all freshwater fish species described worldwide, making Bolivia one of the most species rich countries.
This book, first of its kind for Bolivia, presents a compilation of information on the most well-known species, including pictures, details on life history traits and maps of distribution. We hope this book will participate in demonstrating the need to preserve the uniqueness that represents the Bolivian waters and their diverse fish fauna, and helping Bolivian people in discovering their natural heritage.
%I Plural editores %C La Paz, Bolivia %P 211 pages %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Relevance of macrozoobenthic grazers to understand the dynamic behaviour of sediment erodibility and microphytobenthos resuspension in sunny summer conditions %A Francis Orvain %A Katell Guizien %A Sébastien Lefebvre %A Martine Bréret %A Christine Dupuy %B Journal of Sea Research %V 92 %P 46-55 %8 09/2014 %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Seasonal dynamics of extracellular polymeric substances (EPS) in surface sediments of a diatom-dominated intertidal mudflat (Marennes–Oléron, France) %A Guillaume Pierre %A Jean-Michel Zhao %A Francis Orvain %A Christine Dupuy %A Géraldine Klein %A Marianne Graber %A Thierry Maugard %B Journal of Sea Research %V 92 %P 26-35 %8 09/2014 %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Sequential resuspension of biofilm components (viruses, prokaryotes and protists) as measured by erodimetry experiments in the Brouage mudflat (French Atlantic coast) %A Christine Dupuy %A Clarisse Mallet %A Katell Guizien %A Hélène Montanié %A Martine Bréret %A Françoise Mornet %A Camille Fontaine %A Caroline Nérot %A Francis Orvain %B Journal of Sea Research %V 92 %P 56-65 %8 09/2014 %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Structures of benthic prokaryotic communities and their hydrolytic enzyme activities resuspended from samples of intertidal mudflats: An experimental approach %A Clarisse Mallet %A Hélène Agogué %A Frédérique Bonnemoy %A Katell Guizien %A Francis Orvain %A Christine Dupuy %B Journal of Sea Research %V 92 %P 158-169 %8 09/2014 %G eng %0 Journal Article %J Journal of Sea Research %D 2014 %T Tidal and seasonal effects on the short-term temporal patterns of bacteria, microphytobenthos and exopolymers in natural intertidal biofilms (Brouage, France) %A Francis Orvain %A Margot de Crignis %A Katell Guizien %A Sébastien Lefebvre %A Clarisse Mallet %A Takahashi, E %A Christine Dupuy %B Journal of Sea Research %V 92 %P 6-18 %8 09/2014 %G eng %0 Journal Article %J Journal of Shellfish Research %D 2014 %T Veliger Size at Metamorphosis and Temporal Variability in Prodissoconch II Morphometry in the Blue Mussel (Mytilus edulis): Potential Impact on Recruitment %A Martel, André L. %A Réjean Tremblay %A Nicolas Toupoint %A Frédéric Olivier %A Myrand, B %K blue mussel %K delayed metamorphosis %K larval settlement %K Mytilus edulis %K prodissoconch II %K recruitment %K veligers %XExamination of the larval shell (prodissoconch) of molluscs with planktotrophic development can provide valuable information on their planktonic and early benthic life. We examined temporal variability of abundance and size among 11,994 veligers of the blue mussel (Mytilus edulis) in a coastal lagoon during settling periods between 1995 and 2009. Size and date at metamorphosis during the recruitment season were determined for 1,925 postlarvae (shell length, 255–900 µm) with prodissoconch II (PII) measurements. Emphasizing the recurrence of metamorphosis delay in the field, our study reveals a net increase in mean size at metamorphosis through time, with means for PII size ranging from 255–288 µm early in summer (after peak spawning events) to 400–422 µm (PII) during late July to early September. By estimating the “true” settlement date using the amount of dissoconch secreted after metamorphosis, such time-series analyses appropriately recapitulated the temporal pattern of mean pediveliger (competent larvae) size in the plankton. Our results demonstrate that greater settlement success rates were related to small size at metamorphosis—in particular, less than 320 µm. Seasonal increase in mean PII size occurring during the latter part of the settling period may be explained by competent veligers remaining adrift and delayed metamorphosis as a result of the lack of favorable encounters with a suitable substrate or the absence of specific trophic signals, or cues, required for stimulating settlement, thus forcing larvae to continue planktonic growth. The difference between the smallest and largest means for PII size corresponds to 122 µm of larval shell growth, or 47.8%, potentially representing a 322% difference in larval body mass at settlement.
%B Journal of Shellfish Research %V 33 %P 443-455 %8 08/2014 %G eng %U http://www.bioone.org/doi/full/10.2983/035.033.0213 %N 2 %R http://dx.doi.org/10.2983/035.033.0213 %0 Journal Article %J mBio %D 2013 %T Highly Dynamic Cellular-Level Response of Symbiotic Coral to a Sudden Increase in Environmental NitrogenABSTRACT %A Kopp, C. %A Pernice, M. %A Domart-Coulon, I. %A Djediat, C. %A Spangenberg, J. E. %A Alexander, D. T. L. %A Hignette, M. %A Tarik Meziane %A Meibom, A. %E Orphan, Victoria %E McFall-Ngai, Margaret J. %B mBio %V 4 %8 Jan-07-2013 %G eng %U https://mbio.asm.org/content/4/3/e00052-13 %N 3 %! mBio %R 10.1128/mBio.00052-13 %0 Journal Article %J Aquatic Living Resources %D 2013 %T Trophic resources of the bivalve, Venus verrucosa , in the Chausey archipelago (Normandy, France) determined by stable isotopes and fatty acids %A Perez, Véronique %A Frédéric Olivier %A Tremblay, Rejean %A Neumeier, Urs %A Thebault, Julien %A Chauvaud, Laurent %A Tarik Meziane %B Aquatic Living Resources %V 26 %P 229 - 239 %8 Jan-01-2013 %G eng %U http://www.alr-journal.org/10.1051/alr/2013058 %N 3 %! Aquat. Living Resour. %R 10.1051/alr/2013058