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Lett C, Barrier N, Ourmières Y, Petit C, Labonne M, Bourjea J, Darnaude AM. Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean Sea. Mar Environ Res 2019; 152:104781. [PMID: 31522876 DOI: 10.1016/j.marenvres.2019.104781] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/29/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
To investigate dispersal and connectivity between spawning and lagoon nursery habitats of the gilthead seabream, Sparus aurata, in the Gulf of Lions (northwestern Mediterranean Sea), we modeled the potential transport of the species' larvae between its supposed main spawning site in the region (the Planier Island) and two of its main local nursery areas (the coastal lagoons of Thau and Salses-Leucate). Passive larval drift simulations using a dispersal biophysical model showed a large variability in the possible trajectories from spawning to nursery areas and in the predicted ages for larvae arrival on the two nursery sites. The most common ages at arrival obtained in the simulations (20-60 days) are broadly consistent with previous modeling studies but contrast with the actual ages of the S. aurata post-larvae collected in 2016 and 2017 at time of the lagoon entrances (60-90 days, from otolith readings). The period between 25 and 70 days being critical for gilthead seabream larvae to acquire sufficient swimming, osmoregulatory, and olfactory abilities to enter coastal lagoons, we argue that ontogenic development plays a crucial role in the transport and local retention of S. aurata larvae in the studied region, explaining the discrepancy between simulation results and observed data.
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Affiliation(s)
| | | | - Yann Ourmières
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
| | - Cécile Petit
- MARBEC, IRD, Univ Montpellier, CNRS, Ifremer, Sète, France
| | - Maylis Labonne
- MARBEC, IRD, Univ Montpellier, CNRS, Ifremer, Sète, France
| | - Jérôme Bourjea
- MARBEC, IRD, Univ Montpellier, CNRS, Ifremer, Sète, France
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Bonifácio P, Grémare A, Amouroux JM, Labrune C. Climate-driven changes in macrobenthic communities in the Mediterranean Sea: A 10-year study in the Bay of Banyuls-sur-Mer. Ecol Evol 2019; 9:10483-10498. [PMID: 31624562 PMCID: PMC6787848 DOI: 10.1002/ece3.5569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/18/2019] [Accepted: 07/26/2019] [Indexed: 11/15/2022] Open
Abstract
Marine ecosystems worldwide are affected by both natural variation and human activities; to disentangle and understand their individual role in influencing the macrobenthic community composition is challenging. The relationship between interannual variability in atmospheric circulation, dictated by the climatic oscillation indices, and the benthic macrofauna composition was assessed at four sampling sites located in the Bay of Banyuls-sur-Mer (NW Mediterranean Sea). Between 2004 and 2013, these sites were sampled annually during autumn/winter and analyzed for sediment grain-size and benthic macrofauna composition (species richness, abundance, and biomass). Temporal changes in these descriptors were correlated with two climatic indices (NAO and WeMO indices) and a set of environmental parameters integrated over three different time periods (i.e., whole year, springtime, and wintertime). Our results confirm the occurrence of major temporal changes in the composition of macrobenthic communities within the Gulf of Lions. More specifically, the results indicate that (a) the WeMO appears to be more closely related to benthic macrofauna composition in the Bay of Banyuls-sur-Mer than the NAO, (b) winter is a better integration period than spring or the whole year as a proxy for community composition changes, and (c) Rhône River water flow is likely involved in the control of benthic macrofauna composition in the whole Gulf of Lions. The present study highlights the importance of WeMO as a regional proxy, which can be used to evaluate changes in benthic macrofauna linked to climatic variability.
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Affiliation(s)
- Paulo Bonifácio
- CNRS, Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR 5805Université de BordeauxTalenceFrance
- CNRS, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), UMR 8222, Observatoire OcéanologiqueSorbonne UniversitéBanyuls-sur-MerFrance
| | - Antoine Grémare
- CNRS, Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR 5805Université de BordeauxTalenceFrance
| | - Jean-Michel Amouroux
- CNRS, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), UMR 8222, Observatoire OcéanologiqueSorbonne UniversitéBanyuls-sur-MerFrance
| | - Céline Labrune
- CNRS, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), UMR 8222, Observatoire OcéanologiqueSorbonne UniversitéBanyuls-sur-MerFrance
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Alekseenko E, Thouvenin B, Tronczyński J, Carlotti F, Garreau P, Tixier C, Baklouti M. Modeling of PCB trophic transfer in the Gulf of Lions; 3D coupled model application. Mar Pollut Bull 2018; 128:140-155. [PMID: 29571357 DOI: 10.1016/j.marpolbul.2018.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 01/05/2018] [Indexed: 06/08/2023]
Abstract
3D coupled modeling approach is used for the PCB dispersion assessment in the Gulf of Lion and its transfer to zooplankton via biogeochemical processes. PCB budgets and fluxes between the different species of PCB: dissolved, particulate, biosorbed on plankton, assimilated by zooplankton, which are governed by different processes: adsorption/desorption, bacteria and plankton mortality, zooplankton excretion, grazing, mineralization, volatilization have been estimated. Model outputs were compared with the available in situ data. It was found that the Rhone River outflows play an important role in the organism contamination in the coastal zone, whereas the atmospheric depositions are rather more important in the offshore zones. The transfer of the available contaminant to bacteria and phytoplankton species is mainly related to the biomass present in the water column. Absorption fluxes (grazing) to zooplankton are rather higher than the passive sorption fluxes, which are themselves also linked to the sorption coefficient.
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Affiliation(s)
- E Alekseenko
- P.P. Shirshov Institute of Oceanography, Russian Academy of Sciences (SIO RAS), Nakhimosvskiy 36, 117218 Moscow, Russia; Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL), CEA Saclay, Gif-sur-Yvette 91191, France.
| | - B Thouvenin
- IFREMER, Dynamiques des Ecosystèmes Côtiers, Z.I. Pointe du Diable, BP70, Plouzané 29280, France
| | - J Tronczyński
- IFREMER, RBE/BE/LBCO, B.P. 21105, Nantes 44311, France
| | - F Carlotti
- Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, Marseille, Cedex 09 13288, France
| | - P Garreau
- IFREMER, Univ. Brest, CNRS UMR 6523, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, 29280 Brest, France
| | - C Tixier
- IFREMER, RBE/BE/LBCO, B.P. 21105, Nantes 44311, France
| | - M Baklouti
- Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, Marseille, Cedex 09 13288, France
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Cresson P, Fabri MC, Miralles FM, Dufour JL, Elleboode R, Sevin K, Mahé K, Bouchoucha M. Variability of PCB burden in 5 fish and sharks species of the French Mediterranean continental slope. Environ Pollut 2016; 212:374-381. [PMID: 26874319 DOI: 10.1016/j.envpol.2016.01.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 01/15/2016] [Accepted: 01/15/2016] [Indexed: 06/05/2023]
Abstract
Despite being generally located far from contamination sources, deep marine ecosystems are impacted by chemicals like PCB. The PCB contamination in five fish and shark species collected in the continental slope of the Gulf of Lions (NW Mediterranean Sea) was measured, with a special focus on intra- and interspecific variability and on the driving factors. Significant differences occurred between species. Higher values were measured in Scyliorhinus canicula, Galeus melastomus and Helicolenus dactylopterus and lower values in Phycis blennoides and Lepidorhombus boscii. These differences might be explained by specific abilities to accumulate and eliminate contaminant, mostly through cytochrome P450 pathway. Interindividual variation was also high and no correlation was observed between contamination and length, age or trophic level. Despite its major importance, actual bioaccumulation of PCB in deep fish is not as documented as in other marine ecosystems, calling for a better assessment of the factors driving individual bioaccumulation mechanisms and originating high variability in PCB contamination.
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Affiliation(s)
- Pierre Cresson
- Ifremer, Laboratoire Environnement Ressources Provence Azur Corse, Centre de Méditerranée, CS 20330, F-83 507 La Seyne sur Mer, France; Ifremer, Channel and North Sea Fisheries Research Unit, Centre Manche - Mer du Nord, BP 669, F-62 321 Boulogne sur Mer, France.
| | - Marie Claire Fabri
- Ifremer, Laboratoire Environnement Ressources Provence Azur Corse, Centre de Méditerranée, CS 20330, F-83 507 La Seyne sur Mer, France
| | - Françoise Marco Miralles
- Ifremer, Laboratoire Environnement Ressources Provence Azur Corse, Centre de Méditerranée, CS 20330, F-83 507 La Seyne sur Mer, France
| | - Jean-Louis Dufour
- Ifremer, Channel and North Sea Fisheries Research Unit, Centre Manche - Mer du Nord, BP 669, F-62 321 Boulogne sur Mer, France
| | - Romain Elleboode
- Ifremer, Channel and North Sea Fisheries Research Unit, Centre Manche - Mer du Nord, BP 669, F-62 321 Boulogne sur Mer, France
| | - Karine Sevin
- Ifremer, Channel and North Sea Fisheries Research Unit, Centre Manche - Mer du Nord, BP 669, F-62 321 Boulogne sur Mer, France
| | - Kelig Mahé
- Ifremer, Channel and North Sea Fisheries Research Unit, Centre Manche - Mer du Nord, BP 669, F-62 321 Boulogne sur Mer, France
| | - Marc Bouchoucha
- Ifremer, Laboratoire Environnement Ressources Provence Azur Corse, Centre de Méditerranée, CS 20330, F-83 507 La Seyne sur Mer, France
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