%0 Journal Article %J Journal of Experimental Marine Biology and Ecology %D 2023 %T Diet quality determines blue mussel physiological status: A long-term experimental multi-biomarker approach %A Liénart, Camilla %A Tedengren, Michael %A Garbaras, Andrius %A Lim, Hwanmi %A Chynel, Mathias %A Robinson, Christophe %A Tarik Meziane %A Karlson, Agnes M.L. %B Journal of Experimental Marine Biology and Ecology %V 563 %P 151894 %8 Jan-06-2023 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0022098123000266 %! Journal of Experimental Marine Biology and Ecology %R 10.1016/j.jembe.2023.151894 %0 Journal Article %J Marine Biology %D 2023 %T Sex-specific seasonal variations in the fatty acid and carotenoid composition of sea cucumber gonads and implications for aquaculture %A Frank David %A Herault, Gwen %A Ameziane, Nadia %A Tarik Meziane %A Badou, Aicha %A Cédric Hubas %B Marine Biology %V 170 %8 Jan-04-2023 %G eng %U https://link.springer.com/10.1007/s00227-023-04198-0 %N 4 %! Mar Biol %R 10.1007/s00227-023-04198-0 %0 Journal Article %J Science of The Total Environment %D 2022 %T Chlordecone-contaminated epilithic biofilms show increased adsorption capacities %A Cédric Hubas %A Monti, Dominique %A Jean-Michel Mortillaro %A Augagneur, Sylvie %A Carbon, Anne %A Duran, Robert %A Karama, Solange %A Tarik Meziane %A Pardon, Patrick %A Risser, Théo %A Tapie, Nathalie %A Najet Thiney %A Budzinski, Hélène %A Lauga, Béatrice %B Science of The Total Environment %V 825 %P 153942 %8 Jan-06-2022 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0048969722010348 %! Science of The Total Environment %R 10.1016/j.scitotenv.2022.153942 %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2022 %T Contrasting organic matter composition in pristine and eutrophicated mangroves revealed by fatty acids and stable isotopes (Rio de Janeiro, Brazil) %A Chynel, Mathias %A Rockomanovic, Sofia %A Gwenaël Abril %A Barroso, Glenda %A Marotta, Humberto %A Machado, Wilson %A Sanders, Christian J. %A Najet Thiney %A Tarik Meziane %X Mangrove sediments have a high capacity of carbon storage, as the result of larger organic matter (OM) inputs from mangrove trees (litter fall and fine roots production) than OM microbial degradation and export to coastal waters. Mangrove sediments also act as traps for suspended matter and particulate OM (POM) from surrounding water masses. Fatty acids (FAs) markers, δ13C and δ15N signatures were used here to characterize the OM composition in three mangroves located in three coastal embayments of the Rio de Janeiro state (Brazil) with increasing urbanization from a pristine mangrove M1 to a moderately impacted mangrove M2 and a highly impacted mangrove M3. In these mangroves, the δ15N signature of tree leaves and sediments increases with anthropogenic influence, consistent with a large-scale eutrophication gradient along the three regions. At mangrove M1, predominant OM inputs from mangrove trees are highlighted by high proportions of long-chain fatty acids, particularly in the inland station, where high organic carbon concentrations (126 ± 108 mg g−1) indicate limited sedimentation of mineral particles and high carbon storage capacities. The sedimentary OM of M3 mangrove was more labile as confirmed by the higher proportions of algal fatty acids, enriched δ13C signature and the C/N ratio 1.6 times lower (p < 0.001) than in the pristine mangrove M1. At the M2 mangrove site, high contribution of bacterial FAs (around 20%) to sedimentary OM and high proportion of poorly biodegradable saturated fatty acids suggest that bacteria degrade algal labile OM in surface sediments but do not mineralize the most refractory fraction of OM. At the eutrophic M3 site, our findings suggest that deposition of labile POM induced an increase of fungal biomass on the sediment, apparently enhancing the microbial loop, and potentially leading to mineralization of refractory OM and carbon losses through a priming effect. %B Estuarine, Coastal and Shelf Science %P 108061 %8 Jan-09-2022 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0272771422003195 %! Estuarine, Coastal and Shelf Science %R 10.1016/j.ecss.2022.108061 %0 Journal Article %J Ecosphere %D 2022 %T Pull the trigger: interplay between benthic and pelagic cues driving the early recruitment of a natural bivalve assemblage %A Androuin, Thibault %A Barbier, Pierrick %A Foret, Martin %A Tarik Meziane %A Thomas, Mathilde %A Archambault, Philippe %A Winkler, Gesche %A Tremblay, Rejean %A Frédéric Olivier %K bacteria %K bivalves %K Chausey Archipelago %K early larval recruitment %K fatty acids %K picoeucaryotes %K trophic settlement trigger %X Larval settlement and recruitment are crucial phases in the benthic-pelagic life cycle of marine benthic invertebrates that controls population dynamic and habitat connectivity. Our study investigated potential triggers driving the settlement of bivalve larvae in a highly dynamic intertidal coarse sand habitat. The early recruitment rate of five dominant bivalve families and abiotic conditions, particulate (<20 µm) organic matter and sediment organic matter, were monitored from May to October 2014. Pelagic particulate organic matter (<20 µm) was dominated by picoplankton throughout the sampling period, with a substantial diatom bloom in spring. Sediment was characterized by fresh organic matter in spring, as suggested by the dominant contribution of polyunsaturated fatty acids, and by a higher proportion of bacterial fatty acid markers during late summer. Different dynamics were also observed in early bivalve recruitment rates, with four different patterns observed over the sampling period. Multiple regression analysis on selected bivalve families showed species-specific responses to trophic settlement triggers. Indeed, the larva recruitment rate of Mytilidae paralleled pelagic concentration of picoeucaryotes, with the peak early recruitment rate occurring in spring. Surprisingly, the early recruitment rate of Mactridae larvae showed a significant relation to bacterial concentration in the surficial sediment at the end of summer. While the Mytilidae results in such a eutrophic system confirmed those of a previous study in oligotrophic lagoons, therefore supporting the trophic settlement trigger hypothesis, more work is needed to understand the potential role of bacteria in the early recruitment of Mactridae. These results highlight for the first-time inter-specific differences in trophic cues that potentially trigger primary settlement in natural bivalve assemblages. %B Ecosphere %V 13 %8 Jan-01-2022 %G eng %U https://onlinelibrary.wiley.com/toc/21508925/13/1 %N 1 %! Ecosphere %R 10.1002/ecs2.v13.110.1002/ecs2.3672 %0 Journal Article %J African Journal of Aquatic Science %D 2021 %T Links between introduced fish and zooplanktonic and zoobenthic food sources in the food webs of two reservoirs of a semi-arid zone in Algeria %A Djezzar, M %A Mortillaro, JM %A Doumandji, SE %A Tarik Meziane %X Few studies have focused on the trophic functioning of the reservoirs in Algeria. The study of the gut contents of fish species, as well as the analysis of the stable isotopes of 13C and 15N in the environment, were carried out on samples collected during spring 2010 in two reservoirs: Ghrib and Harreza of the upper Cheliff plain (Algeria) within a semi-arid climate zone. In each of the reservoirs, 13C and 15N were measured in sediments, particulate organic matter (POM), macrophytes, zooplankton, zoobenthos and fish. The isotopic analysis shows that the carbon values that supply both reservoirs, Ghrib and Harreza, were −31.16 ± 0.05 < 13C < −18.01 ± 0.21‰ and −30.82 ± 0.07 < 13C < −17.24 ± 3.50‰, respectively. The carnivorous fish Sander lucioperca, and Abramis brama, an omnivorous fish, were allocated to the top of the food web in Ghrib and Harreza reservoirs, respectively. In the latter, a reservoir with low hydrodynamism and depth, the food web is simpler with a single fish species, which benefits from both benthic and pelagic sources. In Ghrib, a deeper dam with stronger hydrodynamics, only the riverine crab Potamon algeriense exploits the benthic sources, whereas fish mainly feed on zooplankton %B African Journal of Aquatic Science %V 46 %P 33- 44 %8 09/2020 %G eng %U https://www.tandfonline.com/doi/full/10.2989/16085914.2020.1787124 %! African Journal of Aquatic Science %R 10.2989/16085914.2020.1787124 %0 Journal Article %J Scientific Reports %D 2021 %T Multi-trophic markers illuminate the understanding of the functioning of a remote, low coral cover Marquesan coral reef food web %A Fey, Pauline %A Parravicini, Valeriano %A Bănaru, Daniela %A Dierking, Jan %A Galzin, René %A Lebreton, Benoît %A Tarik Meziane %A Polunin, Nicholas V. C. %A Zubia, Mayalen %A Letourneur, Yves %X We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Islands, French Polynesia, characterized by low coral cover, high sea surface temperature and meso- to eutrophic waters. The Marquesas constitute a relevant ecosystem to understand the functioning of low diversity reefs that are also subject to global change. A multi-tracer assessment of organic matter pathways was run to delineate ecosystem functioning, using analysis of fatty acids, bulk and compound specific stable isotope analysis and stable isotopes mixing models. Macroalgae and phytoplankton were the two major food sources fueling this food web with, however, some marked seasonal variations. Specifically, zooplankton relied on phytoplankton-derived organic matter and herbivorous fishes on macroalgae-derived organic matter to a much higher extent in summer than in winter (~ 75% vs. ~ 15%, and ~ 70 to 75% vs. ~ 5 to 15%, respectively) . Despite remarkably high δ15N values for all trophic compartments, likely due to local dynamics in the nitrogen stock, trophic levels of consumers were similar to those of other coral reef ecosystems. These findings shed light on the functioning of low coral cover systems, which are expected to expand worldwide under global change. %B Scientific Reports %V 11 %8 Jan-12-2021 %G eng %U https://www.nature.com/articles/s41598-021-00348-w %N 1 %! Sci Rep %R 10.1038/s41598-021-00348-w %0 Journal Article %J Aquaculture %D 2021 %T Mytilus edulis and Styela clava assimilate picophytoplankton carbon through feces and pseudofeces ingestion %A Sonier, R. %A Comeau, L.A. %A Tremblay, R. %A Frédéric Olivier %A Tarik Meziane %A Genard, B. %X Picophytoplankton (PPP) may contribute to the bulk of primary production in nutrient-rich marine ecosystems. In this study, we quantified the capacity of blue mussels (Mytilus edulis) and clubbed tunicates (Styela clava) to exploit PPP. In the water, we introduced PPP cells that were isotopically labelled with 13C and using the same enrichment approach, we measured the secondary transfer (recycling) of carbon via the assimilation of pseudofeces and feces. Results show that both M. edulis and S. clava assimilate PPP carbon by ingesting PPP cells directly from water. In addition, PPP assimilation rates were similar in both species. Most interesting was our observation that both species assimilated PPP carbon contained in pseudofeces and feces, including large fecal pellets produced by S. clava. We conclude that within cultured and invasive filter feeders, PPP carbon is recycled via ingestion of feces and pseudofeces among individuals growing in close proximity. In aquaculture settings, cultured bivalves and fouling tunicates may provide an ecological service by removing excess PPP in nutrient-rich systems via direct and secondary ingestion.
Keywords: Picophytoplankton, Isotopic labelling, Aquaculture, Feces, Carbon cycling, Blue mussel, Tunicate
  %B Aquaculture %V 531 %P 735868 %8 Jan-01-2021 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0044848620305779 %! Aquaculture %R 10.1016/j.aquaculture.2020.735868 %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2021 %T Prokaryotic abundance, cell size and extracellular enzymatic activity in a human impacted and mangrove dominated tropical estuary (Can Gio, vietnam) %A Frank David %A Tarik Meziane %A Marchand, Cyril %A Rolland, Guillaume %A Pham, Aurélie %A Thanh-Nho, Nguyen %A Lamy, Dominique %X Extracellular enzymatic activities constitute the first and limiting step of the whole process of organic matter (OM) cycling in aquatic ecosystems. This study aims to identify the factors controlling prokaryotes ability to hydrolyse OM in an Indo-Pacific tropical mangrove ecosystem (Can Gio, Vietnam). Prokaryotic abundance and leucine-aminopeptidase exo-proteolytic activity (EPA) were measured at vertical (from the sea-surface microlayer to bottom waters), spatial (along a transect within the estuary) and seasonal (wet and dry season) scales. Prokaryotic abundance ranged from 1.2 to 5.7 × 109 cells L−1 and EPA ranged from 24 to 505 nmol L−1 h−1 that was relatively similar to other highly productive ecosystems. The estuary was poorly stratified, most probably because of high water turbulence. Yet, exo-proteolytic activity was significantly higher in bottom waters, where higher loads of suspended particulate matter were measured. Seasonal and spatial differences in EPA suggest that the nature of OM transported by the Can Gio mangrove estuary affect EPA. The latter seems to be increased by two “uncommon” situations: the input of fresh and labile OM (e.g. shrimp farm effluents) or the lack of labile OM and the need to hydrolyse refractory compounds (e.g. during the dry season). %B Estuarine, Coastal and Shelf Science %P 107253 %8 Jan-02-2021 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0272771421000895 %! Estuarine, Coastal and Shelf Science %R 10.1016/j.ecss.2021.107253 %0 Journal Article %J Progress in Oceanography %D 2021 %T Sources, quality and transfers of organic matter in a highly-stratified sub-Arctic coastal system (Saint-Pierre-et-Miquelon, NW Atlantic) %A Bridier, Guillaume %A Tarik Meziane %A Grall, Jacques %A Chauvaud, Laurent %A Donnet, Sébastien %A Lazure, Pascal %A Frédéric Olivier %X In response to ongoing global climate change, marine ecosystems in the northwest Atlantic are experiencing one of the most drastic increases in sea surface temperatures in the world. This warming can increase water column stratification and decrease surface nutrient concentrations, in turn impacting primary productivity and phytoplankton assemblages. However, the exact impacts of these changes on sources and quality of organic matter as well as its transfers to the benthic compartment remain uncertain. This survey characterized organic matter sources and quality within a highly-stratified sub-Arctic coastal system (Saint-Pierre and Miquelon) and described its transfer towards a biomass-dominant primary consumer, the sand dollar Echinarachnius parma. This study analyzed fatty acid and stable isotope (δ13C and δ15N) composition of surface and bottom Particulate Organic Matter (s-POM and b-POM, respectively), Sedimentary Organic Matter (SOM) and sand dollar tissue along a near shore to offshore gradient during two contrasting seasons associated either with sharp or weak water column stratification (i.e. High vs Low Stratification Periods). Results revealed high relative abundances of polyunsaturated fatty acids (notably macro- and microalgae markers) in POM during the Low Stratification Period while the High Stratification Period was characterized by elevated relative abundance of saturated fatty acids indicating a higher organic matter degradation state. In addition, strong seasonal differences were also observed in food availability with four-fold higher concentrations in total suspended solids during Low vs High Stratification Periods. These results suggested thus multiple negative effects of stratification on pelagic-benthic coupling and POM quality. Lower nutrient repletion of surface waters during period of sharp stratification diminishes pelagic-benthic coupling by reducing food availability, POM quality and vertical transfer of organic matter. By contrast, the sediment-based diet of E. parma showed a low spatiotemporal variability reflecting the homogenous composition of the SOM. This study suggests that intensified water column stratification due to increasing sea surface temperatures may modify the pelagic-benthic coupling and future quality and composition of POM pools. %B Progress in Oceanography %P 102483 %8 Jan-11-2021 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0079661120302184 %! Progress in Oceanography %R 10.1016/j.pocean.2020.102483 %0 Journal Article %J Journal of Sea Research %D 2020 %T Fatty acid compositions of four benthic species along the salinity gradient of a human impacted and mangrove dominated tropical estuary (Can Gio, Vietnam) %A Frank David %A Marchand, Cyril %A Van, Vinh Truong %A Taillardat, Pierre %A Thanh-Nho, Nguyen %A Tarik Meziane %X Tropical estuaries are characterised by high spatial and temporal variability in the conditions they provide for living organisms, which in turn may affect their biochemical composition. Anthropogenic contaminants such as nutrients, antibiotics, pesticides and trace metals may also affect the biochemical composition of these coastal organisms, notably with regard to fatty acids (FA), of which optimal species-specific polyunsaturated FA ratios are required to maintain living species in healthy conditions. The objective of this study was to evidence changes in the FA profile of four ubiquist benthic species in relation to the salinity gradient of a human impacted and mangrove dominated tropical estuary (Can Gio, Southern Vietnam). Among the four benthic species studied, two exhibited spatial and seasonal changes in their FA composition: the varunid crab Metaplax elegans and the predatory mangrove murex snail Chicoreus capucinus. Proportions of the FA 16:1ω7, proportions of highly unsaturated FA and ratios of eicosapentanoic acid/arachidonic acid in the tissues of both species seemed related to upstream inputs. Different relative abundances of benthic microalgae affected both claw muscle and hepatopancreas FA composition of M. elegans, while the FA composition of C. capucinus shows that the influence of prey's diet might be transferred within trophic chains. Finally, some species, such as Nerita balteata and Metapenaeus ensis might have more adaptive capacities, because of their mobility, or because of their specific metabolic pathways, minimizing the potential impact of spatial and/or temporal changes in food resources quality. A starvation experiment involving N. balteata actually revealed the metabolic synthesis of non-methylene interrupted FA that may confer cell membranes a higher resistance to external stressors than common polyunsaturated FA. Our study highlights the future possibility of using the FA composition of sentinel organisms (i.e. feeding on specific food resources and/or especially subject to environmental stresses) as a bioindicator tool to assess mangrove ecosystems health. %B Journal of Sea Research %P 101955 %8 Jan-09-2020 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S1385110120301556 %! Journal of Sea Research %R 10.1016/j.seares.2020.101955 %0 Journal Article %J Environmental Microbiology %D 2020 %T Functional diversity of microboring Ostreobium algae isolated from corals %A Massé, Anaïs %A Tribollet, Aline %A Tarik Meziane %A Bourguet‐Kondracki, Marie‐Lise %A Yéprémian, Claude %A Sève, Charlotte %A Thiney, Najet %A Longeon, Arlette %A Couté, Alain %A Domart‐Coulon, Isabelle %X The filamentous chlorophyte Ostreobium sp. dominates shallow marine carbonate microboring communities, and is one of the major agents of reef bioerosion. While its large genetic diversity has emerged, its physiology remains little known, with unexplored relationship between genotypes and phenotypes (endolithic versus free‐living growth forms). Here, we isolated nine strains affiliated to two lineages of Ostreobium (>8% sequence divergence of the plastid gene rbcL), one of which was assigned to the family Odoaceae, from the fast‐growing coral host Pocillopora acuta Lamarck 1816. Free‐living isolates maintained their bioerosive potential, colonizing pre‐bleached coral carbonate skeletons. We compared phenotypes, highlighting shifts in pigment and fatty acid compositions, carbon to nitrogen ratios and stable isotope compositions (δ13C and δ15N). Our data show a pattern of higher chlorophyll b and lower arachidonic acid (20:4ω6) content in endolithic versus free‐living Ostreobium. Photosynthetic carbon fixation and nitrate uptake, quantified via 8 h pulse‐labeling with 13C‐bicarbonate and 15N‐nitrate, showed lower isotopic enrichment in endolithic compared to free‐living filaments. Our results highlight the functional plasticity of Ostreobium phenotypes. The isotope tracer approach opens the way to further study the biogeochemical cycling and trophic ecology of these cryptic algae at coral holobiont and reef scales. %B Environmental Microbiology %8 Dec-10-2020 %G eng %U https://onlinelibrary.wiley.com/doi/10.1111/1462-2920.15256 %! Environ Microbiol %R 10.1111/1462-2920.15256 %0 Journal Article %J Marine Drugs %D 2020 %T Laminariales Host Does Impact Lipid Temperature Trajectories of the Fungal Endophyte Paradendryphiella salina (Sutherland.) %A Vallet, Marine %A Tarik Meziane %A Najet Thiney %A Prado, Soizic %A Cédric Hubas %K fatty acids %K fungal endophytes %K laminariales %K Paradendryphiella salina %X Kelps are colonized by a wide range of microbial symbionts. Among them, endophytic fungi remain poorly studied, but recent studies evidenced yet their high diversity and their central role in algal defense against various pathogens. Thus, studying the metabolic expressions of kelp endophytes under different conditions is important to have a better understanding of their impacts on host performance. In this context, fatty acid composition is essential to a given algae fitness and of interest to food web studies either to measure its nutritional quality or to infer about its contribution to consumers diets. In the present study, Paradendryphiella salina, a fungal endophyte was isolated from Saccharina latissima (L.) and Laminaria digitata (Hudson.) and its fatty acid composition was assessed at increasing salinity and temperature conditions. Results showed that fungal composition in terms of fatty acids displayed algal-dependent trajectories in response to temperature increase. This highlights that C18 unsaturated fatty acids are key components in the host-dependant acclimation of P. salina to salinity and temperature changes %B Marine Drugs %V 18 %P 379 %G eng %U https://www.mdpi.com/1660-3397/18/8/379 %R 10.3390/md18080379 %0 Journal Article %J Frontiers in Marine Science %D 2020 %T Public Perceptions of Mangrove Forests Matter for Their Conservation %A Dahdouh-Guebas, Farid %A Ajonina, Gordon N. %A Amir, A. Aldrie %A Andradi-Brown, Dominic A. %A Aziz, Irfan %A Balke, Thorsten %A Barbier, Edward B. %A Cannicci, Stefano %A Cragg, Simon M. %A Cunha-Lignon, Marília %A Curnick, David J. %A Duarte, Carlos M. %A Duke, Norman C. %A Endsor, Charlie %A Fratini, Sara %A Feller, Ilka C. %A Fromard, François %A Hugé, Jean %A Huxham, Mark %A Kairo, James G. %A Kajita, Tadashi %A Kathiresan, Kandasamy %A Koedam, Nico %A Lee, Shing Yip %A Lin, Hsing-Juh %A Mackenzie, Jock R. %A Mangora, Mwita M. %A Marchand, Cyril %A Tarik Meziane %A Minchinton, Todd E. %A Pettorelli, Nathalie %A Polanía, Jaime %A Polgar, Gianluca %A Poti, Meenakshi %A Primavera, Jurgenne %A Quarto, Alfredo %A Rog, Stefanie M. %A Satyanarayana, Behara %A Schaeffer-Novelli, Yara %A Spalding, Mark %A Van der Stocken, Tom %A Wodehouse, Dominic %A Yong, Jean W. H. %A Zimmer, Martin %A Friess, Daniel A. %X Iconic species and landscapes attract public attention to help reverse the degradation of ecosystems and their biodiversity (Thompson and Rog, 2019); sharing their images on social media can act as a powerful way to influence perceptions and drive positive actions by the public (Wu et al., 2018). Social media platforms such as Twitter, Facebook and Instagram have been used to great effect to communicate the urgency required to halt and reverse tropical forest loss (Lamb et al., 2005) and the plight of coral reefs (Curnock et al., 2019). Ecosystems such as seagrass meadows, mudflats, and mangrove forests receive substantially less media exposure (Duarte et al., 2008). Yet these under-recognized ecosystems are hugely important for local and global societies, providing benefits such as shoreline protection (Barbier, 2016), fisheries (Carrasquilla-Henao and Juanes, 2017), carbon capture and storage (Duarte et al., 2013), alongside supporting rich marine and terrestrial biodiversity (Sievers et al., 2019; Thompson and Rog, 2019) (Figure 1). Apart from these important ecosystem functions, goods and services, mangrove forests are home to a huge diversity of organisms with ecologically and evolutionarily unique adaptations to life in the intertidal zone, including vivipary and salt tolerance in trees, air-breathing in crabs and amphibious behavior in fish (mudskippers); this makes mangrove forests a dynamic and fascinating evolutionary laboratory. %B Frontiers in Marine Science %V 7 %8 Jul-11-2021 %G eng %U https://www.frontiersin.org/articles/10.3389/fmars.2020.603651/full %! Front. Mar. Sci. %R 10.3389/fmars.2020.60365110.3389/fmars.2020.603651.s001 %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2020 %T Relationship between bacterial compartment and particulate organic matter (POM) in coastal systems: An assessment using fatty acids and stable isotopes %A Liénart, Camilla %A Savoye, Nicolas %A Conan, Pascal %A David, Valérie %A Barbier, Pierrick %A Bichon, Sabrina %A Charlier, Karine %A Costes, Laurence %A Derriennic, Hervé %A Ferreira, Sophie %A Gueux, Aurore %A Cédric Hubas %A Maria, Eric %A Tarik Meziane %B Estuarine, Coastal and Shelf Science %V 239 %P 106720 %8 Jan-07-2020 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0272771419301593 %! Estuarine, Coastal and Shelf Science %R 10.1016/j.ecss.2020.106720 %0 Journal Article %J Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences %D 2020 %T Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya %A Frédéric Olivier %A Gaillard, Blandine %A Thebault, Julien %A Tarik Meziane %A Tremblay, Rejean %A Dumont, Dany %A Bélanger, Simon %A Gosselin, Michel %A Jolivet, Aurélie %A Chauvaud, Laurent %A Martel, André L. %A Rysgaard, Søren %A Olivier, Anne-Hélène %A Pettré, Julien %A Mars, Jérôme %A Gerber, Silvain %A Archambault, Philippe %X Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a ‘sea-ice algae–benthos' to a ‘phytoplankton-zooplankton’ dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600 m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore, suggest that changes in pelagic-benthic coupling are likely due either to local changes in sea ice dynamics, mediated through bottom-up regulation exerted by sea ice on phytoplankton production, or to a mismatch between phytoplankton bloom and zooplankton grazing due to phenological change. Both possibilities allow a more regular and increased transfer of food to the seabed.

This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning'. %B Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences %V 378 %P 20190353 %8 Feb-10-2020 %G eng %U https://royalsocietypublishing.org/doi/10.1098/rsta.2019.0353 %N 2181 %! Phil. Trans. R. Soc. A. %R 10.1098/rsta.2019.0353 %0 Journal Article %J Marine Biology %D 2020 %T Sources of organic matter in an atypical phytoplankton rich coral ecosystem, Marquesas Islands: composition and properties %A Fey, P. %A Parravicini, V. %A Lebreton, B. %A Tarik Meziane %A René Galzin %A Zubia, M. %A Bӑnaru, D. %A Letourneur, Y. %X The purpose of this work is to characterize several potential sources of organic matter (OM) in the Marquesas Islands, French Polynesia, and to understand how these sources contribute to OM pools. Stable isotope (δ13C and δ15N) and fatty acid (FA) compositions of OM potential sources (algal turf, benthic macroalgae, detrital terrestrial plants (DTP), phytoplankton) and OM pools (sediment (SOM) and particulate organic matter (POM)) were studied in coastal areas in Nuku Hiva Island. Isotope compositions of marine POM (δ13C = −22.5 ± 0.8 ‰; δ15N = 12.1 ± 1.1 ‰) and SOM (δ13C = −19.1 ± 0.9 ‰; δ15N = 14.4 ± 0.5 ‰) highlighted that OM sources at the base of the local food web had unusually high δ15N values. Potential FA markers of diatoms and/or cyanobacteria (20:5ω3 and 16:1ω7) were found in these two OM pools. In addition, coastal SOM also displayed FA markers of bacteria, macroalgae and terrestrial plants. Formarine POM, potential macroalgae FA markers were recorded (18:2ω6 and 16:2ω4). The stable isotope mixing model highlighted the major contribution of phyto-plankton to the coastal SOM (62%), followed by benthic macroalgae (32%), whereas marine POM was mainly composed of a mixture of algal turf and phytoplankton in similar averaged proportions (38%) but presenting wide variations. Our results as a whole strongly suggest that pelagic-benthic coupled processes drive the characteristics and properties of OM sources. %B Marine Biology %V 167 %8 Jan-07-2020 %G eng %U http://link.springer.com/10.1007/s00227-020-03703-z %N 7 %! Mar Biol %R 10.1007/s00227-020-03703-z %0 Journal Article %J Marine Ecology Progress Series %D 2019 %T Coastal waters freshening and extreme seasonality affect organic matter sources, quality, and transfers in a High Arctic fjord (Young Sound, Greenland) %A Bridier, Guillaume %A Tarik Meziane %A Grall, Jacques %A Laurent Chauvaud %A Sejr, Mikael K. %A Menneteau, Sylvain %A Frédéric Olivier %X

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 Marine Environmental Research %D 2019 %T Fatty acids, C and N dynamics and stable isotope ratios during experimental degradation of shrimp pond effluents in mangrove water %A Vivier, Baptiste %A Frank David %A Cyril Marchand %A Thanh-Nho, Nguyen %A Tarik Meziane %B Marine Environmental Research %V 150 %P 104751 %8 Jan-09-2019 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0141113619301953 %! Marine Environmental Research %R 10.1016/j.marenvres.2019.104751 %0 Journal Article %J Continental Shelf Research %D 2019 %T Short-term changes in the quality of suspended particulate matter in a human impacted and mangrove dominated tropical estuary (Can Gio, Vietnam) %A Frank David %A Cyril Marchand %A Najet Thiney %A Tran-thi, N %A Tarik Meziane %X

Suspended particulate matter (SPM) is a key component of coastal food webs and a key variable of nutrient budgets. Understanding its variability across short time scales in estuaries may help ecologists understand seasonal and diurnal migration of estuarine organisms, and answer how their nutritional requirements are fulfilled. It may also inform biogeochemists regarding the factors that influence import and export of nutrients between terrestrial and coastal ecosystems. This study aimed to link the dynamics of fatty acids, stable isotopes (δ13C and δ15N) and C/N ratios of SPM, revealing organic matter quality, to rapidly varying factors (SPM concentration, salinity and presence of daylight) and comparing this variability to the seasonal variation induced by the alternation of dry and wet seasons in the studied region. Our results revealed that these rapidly varying factors had a strong influence on the bacterial and the phytoplanktonic compartments of SPM. They suggest that tidally resuspended particles are the site of intense heterotrophic activity and that estuarine phytoplankton store lipids during the daytime up to substantially modifying SPM quality. Our study also shows higher freshness of SPM during the wet season. We expect this study to raise the interest of both biologists and biogeochemists to introduce daily variability of SPM in food webs and nutrient budgets modelling.

%B Continental Shelf Research %V 178 %P 59-67 %8 01/05/2019 %G eng %R 10.1016/j.csr.2019.03.011 %0 Journal Article %J Journal of Sea Research %D 2019 %T Trophic relationships and basal resource utilisation in the Can Gio Mangrove Biosphere Reserve (Southern Vietnam) %A Frank David %A Cyril Marchand %A Nguyen, Thanh-Nho %A Pierre Taillardat %A Tarik Meziane %X

Abstract Fatty acid biomarkers and dual stable isotopes (δ13C and δ15N) were used to identify the preferred food sources of consumers in a mangrove tidal creek and nearby unforested (mud bank) and forested areas located in the Can Gio Mangrove Biosphere Reserve (Southern Vietnam). We analysed 15 macro-invertebrates and 1 fish species representing primary consumers and their immediate predators in this area. Specific groups of fatty acids were used to trace the fate of various food sources (i.e., suspended particulate organic matter, mangrove litter and sedimentary organic matter). The δ13C and δ15N of consumers ranged from −26.9 to −18.8‰ and from 1.1 to 9.9‰, respectively. The trophic pathway based on mangrove litter, characteristic of mangrove ecosystems, is nutritionally sustaining various crab and snail species. In contrast, it appears that the most mobile species (fish and shrimps), living in the water column and possibly migrating with tides, are mostly feeding on suspended particulate organic matter, suggesting that this trophic pathway is of great importance for connectivity among tropical coastal ecosystems. Our study suggests that snails and crabs mainly act as mineralisers, processing high quantities of detrital material to meet their nutritional needs and thus releasing nutrients through the production of faeces, that are further mineralised by microorganisms, while locally grown phytoplankton reintegrates these compounds into its biomass and feeds migrating species. We highlight here a possible link between mangrove litter and coastal food webs.

%B Journal of Sea Research %G eng %U https://www.sciencedirect.com/science/article/pii/S1385110118301679 %M 10.1016/j.seares.2018.12.006 %R 10.1016/j.seares.2018.12.006 %0 Journal Article %J Biogeochemistry %D 2018 %T Carbon biogeochemistry and CO2 emissions in a human impacted and mangrove dominated tropical estuary (Can Gio, Vietnam) %A Frank David %A Tarik Meziane %A Tran-thi, N %A Truong Van, V %A Thành-Nho, N %A Pierre Taillardat %A Cyril Marchand %X

The quantitative contribution of tropical estuaries to the atmospheric CO2 budget has large uncertainties, both spatially and seasonally. We investigated the seasonal and spatial variations of carbon biogeochemistry downstream of Ho Chi Minh City (Southern Vietnam). We sampled four sites distributed from downstream of a highly urbanised watershed through mangroves to the South China Sea coast during the dry and wet seasons. Measured partial pressure of CO2(pCO2) ranged from 660 to 3000 μatm during the dry season, and from 740 to 5000 μatm during the wet season. High organic load, dissolved oxygen saturation down to 17%, and pCO2up to 5000 μatm at the freshwater endmember of the estuary reflected the intense human pressure on this ecosystem. We show that releases from mangrove soils affect the water column pCO2 in this large tropical estuary (~600 m wide and 10–20 m deep). This study is among the few to report direct measurements of both water pCO2 and CO2 emissions in a Southeast Asian tropical estuary located in a highly urbanised watershed. It shows that the contribution of such estuaries may have been previously underestimated, with CO2 emissions ranging from 74 to 876 mmol m−2 day−1 at low current velocity (< 0.2 m s−1). Corresponding gas transfer velocities k600, ranging from 1.7 to 11.0 m day−1, were about 2 to 4 times of k600 estimated using published literature equations.

%B Biogeochemistry %P 1-15 %8 27/04/2018 %G eng %R https://doi.org/10.1007/s10533-018-0444-z %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 Nutritional composition of suspended particulate matter in a tropical mangrove creek during a tidal cycle (Can Gio, Vietnam) %A Frank David %A Cyril Marchand %A Pierre Taillardat %A Thành-Nho, N %A Tarik Meziane %B Estuarine, Coastal and Shelf Science %V 200 %P 126-130 %G eng %U https://doi.org/10.1016/j.ecss.2017.10.017 %R 10.1016/j.ecss.2017.10.017 %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 Aquatic Living Ressources %D 2017 %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, L. A. %B Aquatic Living Ressources %V 30 %P 1-13 %8 08/2017 %G eng %U https://www.alr-journal.org/articles/alr/abs/2017/01/alr170056/alr170056.html %R doi.org/10.1051/alr/2017031 %0 Journal Article %J Marine Ecology Progress Series %D 2017 %T Dietary plasticity in the bivalve Astarte moerchi revealed by a multimarker study in two Arctic fjords %A De Cesare, S %A Tarik Meziane %A Laurent Chauvaud %A Richard, J %A Sejr, M K %A Thébault, J %A Winkler, G %A Frédéric Olivier %X

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 %X

ABSTRACT: 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 Estuarine, Coastal and Shelf Science %D 2017 %T The impact of suspended oyster farming on nitrogen cycling and nitrous oxide production in a sub-tropical Australian estuary %A Dirk V. Erler %A David T. Welsh %A William W. Bennet %A Tarik Meziane %A Cédric Hubas %A Daniele Nizzoli %A Angus J.P. Ferguson %K Dissimilatory nitrate reduction to ammonium %X

In this study we quantified nitrate (NO3−) reduction (denitrification, anammox and DNRA) and N2O production in sediments and epibiont communities associated with Sydney Rock Oyster (Saccostrea glomerata) farming. In sediments beneath an active suspended oyster farm, DNRA accounted for 98% of NO3− reduction with rates of up to 169 ± 45 μmol N m−2 h−1. Much of this DNRA was fuelled by NO3− derived from nitrification. Reference sediments had significantly lower DNRA rates of 83.8 ± 28.2 μmol N m−2 h−1, however this constituted 96% of the sites total NO3− reduction. Fatty acid analysis showed that sediment organic matter was more labile in the oyster impacted sediments, facilitating subtle shifts in sediment oxygen demand which increased the Fe2+ availability with respect to the reference sediments. The difference in DNRA rate between the sites was attributed to autotrophic oxidation of soluble Fe2+ in sediments underlying the oyster cultures. DNRA was absent in the oyster shell epibiont communities and rates of anammox and denitrification were lower than in the sediments. Production of NH4+ from the oysters and their associated epibionts was larger than DNRA and reached a rate of 206.2 μmol N m−2 h−1. Nitrous oxide production rates were generally low compared to other aquaculture systems and the net flux of N2O for the combined oyster cultivation system (i.e. sediments plus epibionts) was negative, i.e. there was N2O consumption in the sediments beneath the oysters. Overall, subtropical suspended oyster farming systems favour inorganic N retention over N loss.

%B Estuarine, Coastal and Shelf Science %V 192 %P 117 - 127 %G eng %U http://www.sciencedirect.com/science/article/pii/S0272771417301592 %R http://dx.doi.org/10.1016/j.ecss.2017.05.007 %0 Journal Article %J Marine Ecology and Progress Series %D 2017 %T Multi-approach analysis to assess diet of harbour porpoises Phocoena phocoena in the southern North Sea %A Mahfouz, C %A Tarik Meziane %A Henry, F %A Abi-Ghanem, C %A Spitz, J %A Jauniaux, T %A Bouveroux, T %A Khalef, G %X

Over the past decade, the distribution of harbour porpoises Phocoena phocoena has undergone a southward shift in the North Sea, which has led to an increase in the number of stranded porpoises in its southern part. Since the changes in distribution and relative abundance of porpoises may be linked to the changes in prey availability, the aim of the present work was to investigate whether any changes in the feeding habits of harbour porpoises along the North Sea occurred in the past decade. The diet of harbour porpoises stranded along the southern North Sea (northern France and Belgian coast) was assessed through 3 complementary methods: stomach content analysis, stable isotopes (carbon and nitrogen) analysis determined from muscle samples, and fatty acids analysis determined from blubber samples. Fatty acid patterns and stable isotope values from 52 porpoises were compared to 14 potential prey species collected from the southern North Sea. Our results showed that the diet of porpoises along the southern North Sea comprises fish species that are among the most abundant and widely distributed in the area, except for the sardine Sardina pilchardus that appeared to be a new potential prey. Moreover, our results suggested that the decline in sandeel (Ammodytidae) in the northern parts of the North Sea along with the re-invasion of the southern North Sea by sardine species might affect the distribution of harbour porpoises.

%B Marine Ecology and Progress Series %V 563 %P 249-259 %8 01/2017 %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

%B Journal of Sea Research %V 121 %P 11-23 %G eng %0 Journal Article %J Limnologica - Ecology and Management of Inland Waters %D 2016 %T The fate of C4 and C3 macrophyte carbon in central Amazon floodplain waters: Insights from a batch experiment %A Jean-Michel Mortillaro %A Passarelli, C %A Gwenaël Abril %A Cédric Hubas %A Luis Felipe Artigas %A Marc F Benedetti %A Najet Thiney %A Moreira-Turcq, P %A Pérez, M A %A Vidal, L %A Tarik Meziane %K Central amazon %K Degradation %K fatty acids %K Floodplains %K Macrophytes %K Stables isotopes %X

The central Amazon floodplains are particularly productive ecosystems, where a large diversity of organic carbon sources are available for aquatic organisms. Despite the fact that C4 macrophytes generally produce larger biomasses than C3 macrophytes, food webs in the central Amazon floodplains appear dominantly based on a C3 carbon source.

In order to investigate the respective fate and degradation patterns of C4 and C3 aquatic plant-derived material in central Amazon floodplains, we developed a 23-days batch experiment. Fatty acid and carbon concentrations as well as stable isotope compositions were monitored over time in 60 L tanks. These tanks contained Amazon water, with different biomasses of C3 and C4 macrophyte, representative of in situ densities occurring in central Amazon floodplains.

In the C4Paspalum repens treatments, organic (POC, DOC) and inorganic carbon (DIC) got rapidly enriched in 13C, whereas in the C3Salvinia auriculata treatments, POC and DOC showed little change in concentration and isotopic composition, and DIC got depleted in 13C. The contribution of P. repens to POC and DOC was estimated to reach up to 94.2 and 70.7%, respectively. In contrast, no differences were reported between the C3S. auriculata and control treatments, an observation attributed to the lower C3 biomass encountered in the field, to a slower degradation rate of C3 compared to C4 compounds, and to similar isotopic compositions for river POC and DOC, and C3 compounds.

The 13C enrichments of POC, DOC, and DIC from P. repens treatments were attributed to an enhanced bacterially-mediated hydrolysis and mineralization of C4 material. Evolutions of bacterial abundance and branched fatty acid concentrations confirmed the role of heterotrophic microbial communities in the high P. repens decomposition rate. Our experiment highlights the predominant role of C4 aquatic plants, as a large source of almost entirely biodegradable organic matter available for heterotrophic activity and CO2 outgassing to the atmosphere.

%B Limnologica - Ecology and Management of Inland Waters %V 59 %P 90-98 %G eng %R doi:10.1016/j.limno.2016.03.008 %0 Journal Article %J Marine Biodiversity Records %D 2016 %T First record of Siganus randalli (Teleost, Siganidae) in New Caledonia, and comments on its diet %A Thibaud Moleana %A Luc Della-Patrona %A Tarik Meziane %A Yves Letourneur %X

Background: Most of the 29 Siganidae species are widely distributed through the Indo-Pacific area. In New
Caledonia, these family was represented by 12 species. The present report is the first record of Siganus randalli in New
Caledonian waters and provide information on its diet.
Methods: Three specimens of Siganus randalli were caught in shallow mangrove waters of the southern part of New
Caledonia. Their stomach contents and isotopic signatures (carbon and nitrogen) were analyzed and compared to
others siganids species.
Results and conclusion: This note provides the most southerly record of the rabbitfish Siganus randalli, which extends
its distribution range by 1200 km southward and 1300 km southwest. The data on its diet, when compared with other
co-occurring or more reef-associated siganid species, provide information on feeding processes and ecological
functions associated with its mangrove habitat.
Keywords: Variegated rabbitfish, Diet, Stomach content, Isotope, SW pacific
Abbreviations: ADECAL, Agence de développement économique de la Nouvelle-Calédonie; ARR, Arrêté;
C, Carbon; DENV, Direction de l’environnement; G, grams; IRI, Index of relative importance; LIVE, Laboratoire
insulaire du vivant et de l’environnement; MM, millimeter; N, Nitrogen; SD, standard deviation; TL, Total length;
UNC, Université de la Nouvelle-Calédonie

%B Marine Biodiversity Records %V 9 %P 1-5 %8 11/2016 %G eng %N 81 %R DOI 10.1186/s41200-016-0082-x %0 Journal Article %J Marine Ecology and Progress Series %D 2016 %T Geographic variation in stable isotopic and fatty acid composition of anguilliform leptocephali and particulate organic matter in the South Pacific %A Liénart, Camilla %A Eric Feunteun %A Miller, M J %A Aoyama, J %A Jean-Michel Mortillaro %A Cédric Hubas %A Kuroki, M %A Watanabe, S %A Christine Dupuy %A Alexandre Carpentier %A Otake, T %A Tsukamoto, K %A Tarik Meziane %K Leptocephali · Fatty acids · Stable isotopes · Biomarkers · Trophic ecology · Oceanic currents %X

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’ %X

Abstract 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 Marine Environmental Research %D 2016 %T Meiofauna distribution in a mangrove forest exposed to shrimp farm effluents (New Caledonia) %A L. Della Patrona %A Cyril Marchand %A Cédric Hubas %A Nathalie Molnar %A J. Deborde %A Tarik Meziane %K New Caledonia %X

Abstract Meiofauna abundance, biomass and individual size were studied in mangrove sediments subjected to shrimp farm effluents in New Caledonia. Two strategies were developed: i) meiofauna examination during the active (AP) and the non-active (NAP) periods of the farm in five mangrove stands characteristics of the mangrove zonation along this coastline, ii) meiofauna examination every two months during one year in the stand the closest to the pond (i.e. Avicennia marina). Thirteen taxonomic groups of meiofauna were identified, with nematodes and copepods being the most abundant ones. Meiofauna abundance and biomass increased from the land side to the sea side of the mangrove probably as a result of the increased length of tidal immersion. Abundance of total meiofauna was not significantly different before and after the rearing period. However, the effluent-receiving mangrove presented twice the meiofauna abundance and biomass than the control one. Among rare taxa, mites appeared extremely sensitive to this perturbation.

%B Marine Environmental Research %V 119 %P 100 - 113 %G eng %U http://www.sciencedirect.com/science/article/pii/S0141113616300976 %R http://dx.doi.org/10.1016/j.marenvres.2016.05.028 %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 Biogeosciences %D 2016 %T Spatial and seasonal contrasts of sedimentary organic matter in floodplain lakes of the central Amazon basin %A Sobrinho, R L %A Bernardes, Marcelo C %A Gwenaël Abril %A Kim, J-H %A Zell, C %A Jean-Michel Mortillaro %A Tarik Meziane %A Moreira-Turcq, P %A J S Sinningh Damsté %X


In this study, we investigated the seasonal and spatial pattern of sedimentary organic matter (SOM) in five floodplain lakes of the central Amazon basin (Cabaliana, Janauaca, Canaçari, Mirituba and Curuai) which have different morphologies, hydrodynamics and vegetation coverages. Surface sediments were collected in four hydrological seasons: low water (LW), rising water (RW), high water (HW) and falling water (FW) in 2009 and 2010. We inves-tigated commonly used bulk geochemical tracers such as the C/N ratio and the stable isotopic composition of organic carbon (13Cor). These results were compared with lignin phenol parameters as an indicator of vascular plant detritus and branched glycerol dialkyl glycerol tetraethers (brGDGTs) to trace the input of soil organic matter (OM) from land to the aquatic settings. We also applied the crenarchaeol as an indi- cator of aquatic (rivers and lakes) OM. Our data showed that during the RW and FW seasons, the surface sediments were enriched in lignin and brGDGTs in comparison to other seasons. Our study also indicated that floodplain lake sediments primarily consisted of allochthonous, C3 plant-derived OM. However, a downstream increase in C4 macrophyte-derivedOM contribution was observed along the gradient of increas-ing open waters – i.e., from upstream to downstream. Accordingly, we attribute the temporal and spatial difference in SOM composition to the hydrological dynamics between the floodplain lakes and the surrounding flooded forests.
 

%B Biogeosciences %V 13 %G eng %N 467– 482 %9 original %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 %X

Surface 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 J. Mar. Sci. Eng. %D 2015 %T Concentrations and Fractionation of Carbon, Iron, Sulfur, Nitrogen and Phosphorus in Mangrove Sediments Along an Intertidal Gradient (Semi-Arid Climate, New Caledonia) %A Jonhatan Deborde %A Cyril Marchand %A Nathalie Molnar %A Luc Della-Patrona %A Tarik Meziane %K biogeochemistry %K Mangrove %K New Caledonia %K zonation %X

In mangrove ecosystems, strong reciprocal interactions exist between plant and substrate. Under semi-arid climate, Rhizophora spp. are usually predominant, colonizing the seashore, and Avicennia marina develops at the edge of salt-flats, which is the highest zone in the intertidal range. Along this zonation, distribution and speciation of C, Fe, S, N, and P in sediments and pore-waters were investigated. From the land-side to the sea-side of the mangrove, sediments were characterized by I/ increase in: (i) water content; (ii) TOC; (iii) mangrove-derived OM; II/ and decrease in: (i) salinity; (ii) redox; (iii) pH; (iv) solid Fe and solid P. Beneath Avicennia and Rhizophora, TS accumulated at depth, probably as a result of reduction of iron oxides and sulfate. The loss of total Fe observed towards the sea-side may be related to sulfur oxidation and to more intense tidal flushing of dissolved components. Except the organic forms, dissolved N and P concentrations were very low beneath Avicennia and Rhizophora stands, probably as a result of their uptake by the root systems. However, in the unvegetated salt-flat, NH4+ can accumulate in organic rich and anoxic layers. This study shows: (i) the evolution of mangrove sediment biogeochemistry along the intertidal zone as a result of the different duration of tidal inundation and organic enrichment; and (ii) the strong links between the distribution and speciation of the different elements.

%B J. Mar. Sci. Eng. %P 52-57 %8 02/2015 %G eng %N 3 %9 OPEN ACCESS %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 Marine Pollution Bulletin %D 2015 %T Foraminiferal assemblages as bioindicators to assess potential pollution in mangroves used as a natural biofilter for shrimp farm effluents (New Caledonia) %A Debenay, J-P %A Cyril Marchand %A Nathalie Molnar %A Adélaide Aschenbroich %A Tarik Meziane %K Effluents %K fatty acids %K Foraminifera %K Mangrove %K Shrimp farming %K SW Pacific %X

In New Caledonia, semi-intensive shrimp farms release untreated effluents into the mangrove. Foraminiferal assemblages were analyzed for assessing the impact of effluent release on the benthic compartment. Comparison was made between samples collected (1) in an effluent receiving mangrove before and after the rearing cycle, and (2) for one-year monitoring an effluent receiving and a control mangrove. The distribution of foraminiferal assemblages was primarily driven by the gradient between Rhizophora stands and salt-flats, related to salinity and tidal elevation, and by seasonal cycles. The potential impact of effluent release was due to the combined effects of normal-saline effluents on surface salinity, and of nutrient input and microbial stimulation on food availability. Foraminiferal assemblages did not indicate a substantial impact of farm effluents and suggest that semi-intensive shrimp farming using mangrove for effluent discharge may appear as a sustainable solution in New Caledonia, when considering only the impact on the mangrove itself.

%B Marine Pollution Bulletin %V 93 %P 103-120 %8 15 April 2015 %G eng %N 1-2 %9 Research %R 10.1016/j.marpolbul.2015.02.009 %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2015 %T Seasonal variations of the composition of microbial biofilms in sandy tidal flats: Focus of fatty acids, pigments and exopolymers %A Passarelli, C %A Tarik Meziane %A Najet Thiney %A Dominique Boeuf %A B Jesus %A Mickael Ruivo %A Christian Jeanthon %A Cédric Hubas %K biofilms %K biogenic structures %K EPS %K fatty acids %K monosaccharide composition %K pigments %X

Abstract Biofilms, or microbial mats, are common associations of microorganisms in tidal flats; they generally consist of a large diversity of organisms embedded in a matrix of Extracellular Polymeric Substances (EPS). These molecules are mainly composed of carbohydrates and proteins, but their detailed monomer compositions and seasonal variations are currently unknown. Yet this composition determines the numerous roles of biofilms in these systems. This study investigated the changes in composition of carbohydrates in intertidal microbial mats over a year to decipher seasonal variations in biofilms and in varying hydrodynamic conditions. This work also aimed to assess how these compositions are related to microbial assemblages. In this context, natural biofilms whose development was influenced or not by artificial structures mimicking polychaete tubes were sampled monthly for over a year in intertidal flats of the Chausey archipelago. Biofilms were compared through the analysis of their fatty acid and pigment contents, and the monosaccharide composition of their \{EPS\} carbohydrates. Carbohydrates from both colloidal and bound \{EPS\} contained mainly glucose and, to a lower extent, galactose and mannose but they showed significant differences in their detailed monosaccharide compositions. These two fractions displayed different seasonal evolution, even if glucose accumulated in both fractions in summer; bound \{EPS\} only were affected by artificial biogenic structures. Sediment composition in fatty acids and pigments showed that microbial communities were dominated by diatoms and heterotrophic bacteria. Their relative proportions, as well as those of other groups like cryptophytes, changed between times and treatments. The changes in \{EPS\} composition were not fully explained by modifications of microbial assemblages but also depended on the processes taking place in sediments and on environmental conditions. These variations of \{EPS\} compositions are likely to alter different ecosystem processes such as biostabilisation or pollutants trapping.

%B Estuarine, Coastal and Shelf Science %V 153 %P 29 - 37 %G eng %U http://www.sciencedirect.com/science/article/pii/S0272771414003412 %R http://dx.doi.org/10.1016/j.ecss.2014.11.013 %0 Journal Article %J Continental Shelf Research %D 2015 %T Spatial changes in fatty acids signatures of the great scallop Pecten maximus across the Bay of Biscay continental shelf %A Nerot, C %A Tarik Meziane %A Gauthier Schaal %A Grall, J %A Lorrain, A %A Paullet, Y-M %A Kraffe, E %K Depth gradient %K fatty acids %K Metabolism %K Pecten maximus %K Trophic markers %X

The spatial variability of food resources along continental margins can strongly influence the physiology and ecology of benthic bivalves. We explored the variability of food sources of the great scallop Pecten maximus, by determining their fatty acid (FA) composition along an inshore–offshore gradient in the Bay of Biscay (from 15 to 190 m depth). The FA composition of the digestive gland showed strong differences between shallow and deep-water habitats. This trend was mainly driven by their content in diatom-characteristic fatty acids, which are abundant near the coast. Scallops collected from the middle of the continental shelf were characterized by higher contents of flagellate markers than scallops from shallow habitats. This could be related to a permanent vertical stratification in the water column, which reduced vertical mixing of waters, thereby enhancing organic matter recycling through the microbial loop. In the deeper water station (190 m), FA compositions were close to the compositions found in scallops from shallow areas, which suggest that scallops could have access to the same resources (i.e. diatoms). Muscle FA composition was more indicative of the physiological state of scallops over this depth range, revealing contrasting reproductive strategies among the two coastal sites and metabolic or physiological adaptation at greater depth (e.g. structural and functional adjustments of membrane composition). This study therefore revealed contrasted patterns between shallow and deeper habitats for both P. maximus muscle and digestive gland tissues. This emphasizes the variability in the diet of this species along its distribution range, and stresses the importance of analyzing different tissues for their FA composition in order to better understand their physiology and ecology.

%B Continental Shelf Research %V 109 %P 1-9 %8 15/10/2015 %G eng %0 Journal Article %J Science of The Total Environment %D 2015 %T Spatio-temporal variations in the composition of organic matter in surface sediments of a mangrove receiving shrimp farm effluents (New Caledonia) %A Adélaide Aschenbroich %A Cyril Marchand %A Nathalie Molnar %A Jonhatan Deborde %A Cédric Hubas %A Hervé Rybarczyk %A Tarik Meziane %K Chlorophyll-a %K fatty acids %K Mangrove %K Organic matter %K Shrimp farming %K Stable isotopes %X

In order to investigate spatio-temporal variations in the composition and origin of the benthic organic matter (OM) at the sediment surface in mangrove receiving shrimp farm effluents, fatty acid (FA) biomarkers, natural stable isotopes (δ13C and δ15N), C:N ratios and chlorophyll-a (chl-a) concentrations were determined during the active and the non-active period of the farm. Fatty acid compositions in surface sediments within the mangrove forest indicated that organic matter inputs varied along the year as a result of farm activity. Effluents were the source of fresh particulate organic matter for the mangrove, as evidenced by the unsaturated fatty acid (UFA) distribution. The anthropogenic \{MUFA\} 18:1ω9 was not only accumulated at the sediment surface in some parts of the mangrove, but was also exported to the seafront. Direct release of bacteria and enhanced in situ production of fungi, as revealed by specific FAs, stimulated mangrove litter decomposition under effluent runoff condition. Also, microalgae released from ponds contributed to maintain high benthic chl-a concentrations in mangrove sediments in winter and to a shift in microphytobenthic community assemblage. Primary production was high whether the farm released effluent or not which questioned the temporary effect of shrimp farm effluent on benthic microalgae dynamic. This study outlined that mangrove benthic organic matter was qualitatively and quantitatively affected by shrimp farm effluent release and that responses to environmental condition changes likely depended on mangrove stand characteristics.

%B Science of The Total Environment %V 512–513 %P 296 - 307 %G eng %U http://www.sciencedirect.com/science/article/pii/S0048969714017938 %R http://dx.doi.org/10.1016/j.scitotenv.2014.12.082 %0 Journal Article %J Freshwater Biology %D 2015 %T Trophic opportunism of central Amazon floodplain fish %A Jean-Michel Mortillaro %A Marc Pouilly %A Wach, M %A Carlos E.C. Freitas %A Gwenaël Abril %A Tarik Meziane %B Freshwater Biology %V 60 %P 1659–1670 %G eng %0 Journal Article %J Nature %D 2014 %T Amazon River carbon dioxide outgassing fuelled by wetlands %A Gwenaël Abril %A Martinez, Jean Michel %A Luis Felipe Artigas %A Moreira-Turcq, Patricia %A Marc F Benedetti %A Vidal, Luciana %A Tarik Meziane %A Kim, Jung-Hyun %A Bernardes, Marcelo C %A Savoye, Nicolas %A Deborde, Jonathan %A Lima Souza, Edivaldo %A Albéric, Patrick %A Fernandes, Marcelo %A de Souza, Landim %A Roland, Fabio %B Nature %I Nature %V 505 %P 395-398 %G eng %R 10.1038/nature12797 %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 %X

The 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 Journal Article %J Journal of acquaculture research & development %D 2014 %T Seasonal Pattern of the Biogeochemical Properties of Mangrove Sediments Receiving Shrimp Farm Effluents (New Caledonia) %A Cyril Marchand %A Molnar, N %A Deborde, J %A Patrona, LC %A Tarik Meziane %B Journal of acquaculture research & development %V 05 %G eng %N 05 %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 Estuarine, Coastal and Shelf Science %D 2013 %T Impacts of shrimp farm effluent on water quality, benthic metabolism and N-dynamics in a mangrove forest (New Caledonia) %A Molnar, Nathalie %A Welsh, David T. %A Marchand, Cyril %A Deborde, Jonathan %A Tarik Meziane %B Estuarine, Coastal and Shelf Science %V 117 %P 12 - 21 %8 Jan-01-2013 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0272771412002739 %! Estuarine, Coastal and Shelf Science %R 10.1016/j.ecss.2012.07.012 %0 Journal Article %J PLoS ONE %D 2013 %T Seasonal Variations in Maternal Provisioning of Crepidula fornicata (Gastropoda): Fatty Acid Composition of Females, Embryos and Larvae %A Leroy, Fanny %A Tarik Meziane %A Riera, Pascal %A Comtet, Thierry %E Anil, Arga Chandrashekar %B PLoS ONE %V 8 %P e75316 %8 Dec-09-2014 %G eng %U https://dx.plos.org/10.1371/journal.pone.0075316 %N 9 %! PLoS ONE %R 10.1371/journal.pone.007531610.137 %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 %0 Journal Article %J Lipids %D 2012 %T New 2-Methyl-13-Icosenoic Acid from the Temperate Calcisponge Leuconia johnstoni %A Quévrain, Elodie %A Barnathan, Gilles %A Tarik Meziane %A Domart-Coulon, Isabelle %A Rabesaotra, Vony %A Bourguet-Kondracki, Marie-Lise %B Lipids %V 47 %P 345 - 353 %8 Jan-04-2012 %G eng %U http://doi.wiley.com/10.1007/s11745-011-3631-4 %N 4 %! Lipids %R 10.1007/s11745-011-3631-4 %0 Journal Article %J Coral Reefs %D 2012 %T Ontogenetic change in the lipid and fatty acid composition of scleractinian coral larvae %A Figueiredo, J. %A Baird, A. H. %A Cohen, M. F. %A Flot, J.-F. %A Kamiki, T. %A Tarik Meziane %A Tsuchiya, M. %A Yamasaki, H. %B Coral Reefs %V 31 %P 613 - 619 %8 Jan-06-2012 %G eng %U http://link.springer.com/10.1007/s00338-012-0874-3 %N 2 %! Coral Reefs %R 10.1007/s00338-012-0874-3 %0 Journal Article %J Chemosphere %D 2012 %T Responses of juvenile sea bass, Dicentrarchus labrax, exposed to acute concentrations of crude oil, as assessed by molecular and physiological biomarkers %A Kerambrun, E. %A Le Floch, S. %A Sanchez, W. %A Thomas Guyon, H. %A Tarik Meziane %A Henry, F. %A Amara, R. %B Chemosphere %V 87 %P 692 - 702 %8 Jan-05-2012 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0045653511014287 %N 7 %! Chemosphere %R 10.1016/j.chemosphere.2011.12.059 %0 Journal Article %J Journal of Experimental Marine Biology and Ecology %D 2012 %T Surface adhesion of microphytobenthic biofilms is enhanced under Hediste diversicolor (O.F. Müller) trophic pressure %A Passarelli, Claire %A Cédric Hubas %A Nicolas Segui, Audrey %A Grange, Julie %A Tarik Meziane %B Journal of Experimental Marine Biology and Ecology %V 438 %P 52 - 60 %8 Jan-12-2012 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0022098112003577 %! Journal of Experimental Marine Biology and Ecology %R 10.1016/j.jembe.2012.10.005 %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2011 %T There’s more to the picture than meets the eye: Sampling microphytobenthos in a heterogeneous environment %A Spilmont, Nicolas %A Seuront, Laurent %A Tarik Meziane %A Welsh, David T. %B Estuarine, Coastal and Shelf Science %V 95 %P 470 - 476 %8 Jan-12-2011 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0272771411004434 %N 4 %! Estuarine, Coastal and Shelf Science %R 10.1016/j.ecss.2011.10.021 %0 Journal Article %J Aquatic Ecosystem Health & Management %D 2009 %T Fatty acid markers as an indicator for temporal changes in food sources of the bivalve Quidnipagus palatum %A Bachok, Zainudin %A Tarik Meziane %A Mfilinge, Prosper L. %A Tsuchiya, Makoto %B Aquatic Ecosystem Health & Management %V 12 %P 390 - 400 %8 Jun-11-2011 %G eng %U http://www.tandfonline.com/doi/abs/10.1080/14634980903347589 %N 4 %! Aquatic Ecosystem Health & Management %R 10.1080/14634980903347589 %0 Journal Article %J Austral Ecology %D 2009 %T Identification of the food sources of sympatric ghost shrimp ( Trypaea australiensis ) and soldier crab ( Mictyris longicarpus ) populations using a lipid biomarker, dual stable isotope approach %A Spilmont, Nicolas %A Tarik Meziane %A Seuront, Laurent %A Welsh, David T. %B Austral Ecology %V 34 %P 878 - 888 %8 Jan-12-2009 %G eng %U http://blackwell-synergy.com/doi/abs/10.1111/aec.2009.34.issue-8 %N 8 %R 10.1111/aec.2009.34.issue-810.1111/j.1442-9993.2009.01994.x %0 Journal Article %J Hydrobiologia %D 2009 %T Oxygen and nutrient dynamics of the upside down jellyfish (Cassiopea sp.) and its influence on benthic nutrient exchanges and primary production %A Welsh, David T. %A Dunn, Ryan J. K. %A Tarik Meziane %B Hydrobiologia %V 635 %P 351 - 362 %8 Jan-11-2009 %G eng %U http://link.springer.com/10.1007/s10750-009-9928-0 %N 1 %! Hydrobiologia %R 10.1007/s10750-009-9928-0 %0 Journal Article %J Marine Biology %D 2009 %T Role of grapsid crabs, Parasesarma erythrodactyla, in entry of mangrove leaves into an estuarine food web: a mesocosm study %A Nerot, Caroline %A Tarik Meziane %A Provost-Govrich, Anais %A Rybarczyk, Hervé %A Lee, S. Yip %B Marine Biology %V 156 %P 2343 - 2352 %8 Jan-10-2009 %G eng %U http://link.springer.com/10.1007/s00227-009-1262-6 %N 11 %! Mar Biol %R 10.1007/s00227-009-1262-6 %0 Journal Article %J Journal of Fish Biology %D 2008 %T Opportunistic predation by small fishes on epibiota of jetty pilings in urban waterways %A Moreau, S. %A Péron, C. %A Pitt, K. A. %A Connolly, R. M. %A Lee, S. Y. %A Tarik Meziane %B Journal of Fish Biology %V 72 %P 205 - 217 %8 Jan-01-2008 %G eng %U http://doi.wiley.com/10.1111/j.1095-8649.2007.01705.x %N 1 %R 10.1111/j.1095-8649.2007.01705.x %0 Journal Article %J Marine Ecology Progress Series %D 2007 %T Growth and condition indices in juvenile sole Solea solea measured to assess the quality of essential fish habitat %A Amara, R %A Tarik Meziane %A Gilliers, C %A Hermel, G %A Laffargue, P %B Marine Ecology Progress Series %V 351 %P 201 - 208 %8 Jun-12-2007 %G eng %U http://www.int-res.com/abstracts/meps/v351/p201-208/ %! Mar. Ecol. Prog. Ser. %R 10.3354/meps07154 %0 Journal Article %J Marine Biology %D 2007 %T Inter-specific and geographical variations in the fatty acid composition of mangrove leaves: implications for using fatty acids as a taxonomic tool and tracers of organic matter %A Tarik Meziane %A Lee, S. Y. %A Mfilinge, P. L. %A Shin, P. K. S. %A Lam, M. H. W. %A Tsuchiya, M. %B Marine Biology %V 150 %P 1103 - 1113 %8 Jan-03-2007 %G eng %U http://link.springer.com/10.1007/s00227-006-0424-z %N 6 %! Mar Biol %R 10.1007/s00227-006-0424-z %0 Journal Article %J Marine Ecology Progress Series %D 2006 %T Fate of mangrove organic matter along a subtropical estuary: small-scale exportation and contribution to the food of crab communities %A Tarik Meziane %A d’Agata, F %A Lee, SY %B Marine Ecology Progress Series %V 312 %P 15 - 27 %8 Dec-04-2007 %G eng %U http://www.int-res.com/abstracts/meps/v312/p15-27/ %! Mar. Ecol. Prog. Ser. %R 10.3354/meps312015 %0 Journal Article %J Journal of Experimental Marine Biology and Ecology %D 2006 %T Fatty acids as trophic tracers in an experimental estuarine food chain: Tracer transfer %A Hall, David %A Lee, S.Y. %A Tarik Meziane %B Journal of Experimental Marine Biology and Ecology %V 336 %P 42 - 53 %8 Jan-08-2006 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0022098106002012 %N 1 %! Journal of Experimental Marine Biology and Ecology %R 10.1016/j.jembe.2006.04.004 %0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2005 %T Litter dynamics and particulate organic matter outwelling from a subtropical mangrove in Okinawa Island, South Japan %A Mfilinge, Prosper L. %A Tarik Meziane %A Bachok, Zainudin %A Tsuchiya, Makoto %B Estuarine, Coastal and Shelf Science %V 63 %P 301 - 313 %8 Jan-04-2005 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0272771404003543 %N 1-2 %! Estuarine, Coastal and Shelf Science %R 10.1016/j.ecss.2004.11.022 %0 Journal Article %J Journal of Oceanography %D 2005 %T Total Lipid and Fatty Acid Classes in Decomposing Mangrove Leaves of Bruguiera gymnorrhiza and Kandelia candel: Significance with respect to Lipid Input %A Mfilinge, Prosper L. %A Tarik Meziane %A Bachok, Zainudin %A Tsuchiya, Makoto %B Journal of Oceanography %V 61 %P 613 - 622 %8 Jan-06-2005 %G eng %U http://link.springer.com/10.1007/s10872-005-0069-4 %N 3 %! J Oceanogr %R 10.1007/s10872-005-0069-4 %0 Journal Article %J Marine Ecology Progress Series %D 2003 %T Fatty acids in decomposing mangrove leaves: microbial activity, decay and nutritional quality %A Mfilinge, PL %A Tarik Meziane %A Bachok, Z %A Tsuchiya, M %B Marine Ecology Progress Series %V 265 %P 97 - 105 %8 Jan-01-2003 %G eng %U http://www.int-res.com/abstracts/meps/v265/p97-105/ %! Mar. Ecol. Prog. Ser. %R 10.3354/meps265097 %0 Journal Article %J Oceanologica Acta %D 2002 %T Croissance de juvéniles de Nereis diversicolor nourris avec des détritus d’halophytes %A Tarik Meziane %A Retiere, Christian %B Oceanologica Acta %V 25 %P 119 - 124 %8 Jan-05-2002 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0399178402011878 %N 3-4 %! Oceanologica Acta %R 10.1016/S0399-1784(02)01187-8 %0 Journal Article %J Aquatic Botany %D 2002 %T Feeding deterrence of Azolla in relation to deoxyanthocyanin and fatty acid composition %A Cohen, Michael F %A Tarik Meziane %A Tsuchiya, Makoto %A Yamasaki, Hideo %B Aquatic Botany %V 74 %P 181 - 187 %8 Jan-10-2002 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0304377002000773 %N 2 %! Aquatic Botany %R 10.1016/S0304-3770(02)00077-3 %0 Journal Article %J Journal of Sea Research %D 2002 %T Organic matter in a subtropical mangrove-estuary subjected to wastewater discharge: Origin and utilisation by two macrozoobenthic species %A Tarik Meziane %A Tsuchiya, Makoto %B Journal of Sea Research %V 47 %P 1 - 11 %8 Jan-02-2002 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S1385110101000922 %N 1 %! Journal of Sea Research %R 10.1016/S1385-1101(01)00092-2 %0 Journal Article %J Marine Ecology Progress Series %D 2000 %T Fatty acids as tracers of organic matter in the sediment and food web of a mangrove/intertidal flat ecosystem, Okinawa, Japan %A Tarik Meziane %A Tsuchiya, M %B Marine Ecology Progress Series %V 200 %P 49 - 57 %8 Jan-01-2000 %G eng %U http://www.int-res.com/abstracts/meps/v200/p49-57/ %! Mar. Ecol. Prog. Ser. %R 10.3354/meps200049 %0 Journal Article %J Journal of Sea Research %D 1997 %T The use of lipid markers to define sources of organic matter in sediment and food web of the intertidal salt-marsh-flat ecosystem of Mont-Saint-Michel Bay, France %A Tarik Meziane %A Bodineau, Laurent %A Retiere, Christian %A Thoumelin, Guy %B Journal of Sea Research %V 38 %P 47 - 58 %8 Jan-12-1997 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S138511019700035X %N 1-2 %! Journal of Sea Research %R 10.1016/S1385-1101(97)00035-X