Article (Scientific journals)
Deciphering environmental forcings in the distribution of meiofauna and nematodes in mangroves of the Atlantic-Caribbean-East Pacific and Indo-West Pacific regions.
Spedicato, Adriana; Zeppilli, Daniela; Thouzeau, Gérard et al.
2024In Science of the Total Environment, 930, p. 172612
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Keywords :
Guadeloupe; Martinique; Mayotte; Meiobenthos; Perturbations; Sediment; Water Pollutants, Chemical; Animals; Water Pollutants, Chemical/analysis; Caribbean Region; Invertebrates; Nematoda; Environmental Monitoring; Wetlands; Geologic Sediments/chemistry; Anthropogenic pressures; Condition; Environmental forcing; Indo-West Pacific; Meiofauna; Perturbation; Geologic Sediments; Environmental Engineering; Environmental Chemistry; Waste Management and Disposal; Pollution
Abstract :
[en] Mangroves develop under environmental conditions and anthropogenic pressures whose impact on benthic meiofauna remains poorly understood. It is unclear how meiofauna communities are structured according to local sedimentary conditions. This study was designed to characterize the community structure of meiofauna and nematodes (dominant taxa) and the associated environmental forcings in intertidal mangrove sediments from Mayotte (Indo-West-Pacific), Martinique and Guadeloupe (Caribbean). Sediment cores were sampled at the end of the dry season at low tide on adult mangrove stands with similar immersion time. In each sediment layer, we analyzed redox potential, pH, porewater salinity, grain size, organic matter, metals, organic contaminants, prokaryotes and meiofauna. Our results show that sediments far from cities and agricultural fields trapped site-specific contaminants due to local water transport processes. Some metals, PAHs or pesticides exceeded toxicity thresholds in most of the studied stations, thus being harmful to benthic fauna. The sedimentary environment acts as a filter selecting specific meiofauna communities at station scale only in the Caribbean. In Mayotte, horizontal homogeneity contrasts with vertical heterogeneity of the sedimentary environment and the meiofauna. Nematode genera showed particular distribution patterns horizontally and vertically, suggesting the presence of sediment patches suitable for a restricted pool of genera on each island. Results in the Caribbean are consistent with nested diversity patterns due to environmental filtering. Conversely, horizontal homogeneity at Mayotte would reflect greater dispersal between stations or more spatially homogeneous anthropogenic pressures. The nematode genera present at depth may not be the most specialized, but the most versatile, capable of thriving in different conditions. Terschellingia and Daptonema showed contrasted responses to environmental forcing, likely due to their versatility, while Desmodora showed uniform responses between study areas, except when toxicity thresholds were exceeded. Our results emphasize that a given genus of nematode may respond differently to sedimentary conditions depending on sites.
Research Center/Unit :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Zoology
Author, co-author :
Spedicato, Adriana ;  Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France. Electronic address: spedicato@univ-brest.fr
Zeppilli, Daniela ;  Univ Brest, Ifremer, Biologie et Ecologie des Ecosystèmes marins Profonds, F-29280 Plouzané, France. Electronic address: daniela.zeppilli@ifremer.fr
Thouzeau, Gérard ;  Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France. Electronic address: gerard.thouzeau@univ-brest.fr
Cuny, Philippe;  Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France. Electronic address: philippe.cuny@univ-amu.fr
Militon, Cécile ;  Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France. Electronic address: cecile.militon@univ-amu.fr
Sylvi, Léa;  Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France. Electronic address: lea.sylvi@mio.osupytheas.fr
Hubas, Cédric ;  Biologie des Organismes et Ecosystèmes Aquatiques (UMR 8067 BOREA) Muséum National D'Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Station Marine de Concarneau, 29900 Concarneau, France. Electronic address: cedric.hubas@mnhn.fr
Dirberg, Guillaume ;  Biologie des Organismes et Ecosystèmes Aquatiques (UMR 8067 BOREA) Muséum National D'Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Station Marine de Concarneau, 29900 Concarneau, France
Jézéquel, Ronan;  CEDRE, 715 rue Alain Colas, 29218 Brest Cedex 2, France. Electronic address: Ronan.Jezequel@cedre.fr
Barrière, Guerric;  Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France. Electronic address: guerric.barriere@univ-brest.fr
Michel, Loïc  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Systématique et diversité animale
Bezerra, Tânia Nara ;  Marine Biology Research Group, Ghent University, Ghent, Belgium. Electronic address: Tania.CampinasBezerra@UGent.be
Michaud, Emma ;  Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France. Electronic address: emma.michaud@univ-brest.fr
More authors (3 more) Less
Language :
English
Title :
Deciphering environmental forcings in the distribution of meiofauna and nematodes in mangroves of the Atlantic-Caribbean-East Pacific and Indo-West Pacific regions.
Publication date :
20 June 2024
Journal title :
Science of the Total Environment
ISSN :
0048-9697
eISSN :
1879-1026
Publisher :
Elsevier B.V., Netherlands
Volume :
930
Pages :
172612
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ISblue
Region Bretagne
Office francais de la biodiversite
Funding text :
This project was co-funded by the Office fran\u00E7ais de la biodiversit\u00E9 (OFB), Office de l'Eau de la Guadeloupe (OEG), and Office de l'Eau de la Martinique (OEM) in the framework of the European Water Directive. A. Spedicato PhD thesis was funded by the Office de l'Eau de la Guyane and the Brittany Region. This work was also supported by the French National Research Institute for Sustainable Development (IRD), the Interdisciplinary School for the Blue planet (ISBlue, ANR-17-EURE-0015) and the French government with a grant from the program \u201CInvestissements d'Avenir\u201D embedded in France 2030. The authors thank F. Fromard, Romain Walker (UMR LEFE), K. Abdallah (SMEAM), I. Bihannic (LEMAR), S. Cordonnier (BOREA) and J. Migeot (Impact Mer office) for helping during fieldwork; C. Michelet (LEMAR) for sorting meiofauna of Martinique and Mayotte; J. Devesa (LEMAR) for CHN analyses; C. Pautot (EcoLab-LEFE PAPC, Univ. Toulouse) for the granulometry analyses. The authors are also grateful to University Center of Mayotte (CUFR; C. Gollety and E. Sucr\u00E9), Water Syndicate of Mayotte (SMEAM), Universit\u00E9 des Antilles (M. Ren\u00E9-Trouillefou, D. Monti, O. Gros, P.Y. Pascal), Parc National de la Guadeloupe (PNG) and Centre de Coop\u00E9ration en Recherche Agronomique pour le D\u00E9veloppement (CIRAD) in Martinique for providing laboratory facilities.
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