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Open AccessArticle

First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana

1
Univ Brest, CNRS, IRD, Ifremer, LEMAR, 29280 Plouzané, France
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IFREMER, Centre Brest, REM/EEP/LEP, ZI de la Pointe du Diable, CS10070, 29280 Plouzané, France
3
Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Muséum National D’Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Station Marine de Concarneau, 29900 Concarneau, France
4
Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France
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Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Muséum National D’Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Rue Buffon, 75005 Paris, France
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Laboratoire Écologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse INP, Université Toulouse 3—Paul Sabatier (UPS), 31326 Toulouse, France
7
CEDRE, Rue Alain Colas, 29218 Brest CEDEX 2, France
*
Author to whom correspondence should be addressed.
Academic Editors: Victor H. Rivera-Monroy, Xosé Lois Otero-Pérez, Jorge Lopez-Portillo and Tiago Osorio Ferreira
Forests 2021, 12(3), 338; https://doi.org/10.3390/f12030338
Received: 28 January 2021 / Revised: 25 February 2021 / Accepted: 8 March 2021 / Published: 13 March 2021
(This article belongs to the Special Issue Mangrove Wetland Restoration and Rehabilitation)
Bioindicators assess the mangroves ecological state according to the types of pressures but they differ with the ecosystem’s specificities. We investigated benthic meiofauna diversity and structure within the low human-impacted mangroves in French Guiana (South America) in response to sediment variables with various distances to the main city. Contaminant’s concentrations differed among the stations, but they remained below toxicity guidelines. Meiofauna structure (Foraminifera, Kinorhyncha, Nematoda) however varied accordingly. Nematode’s identification brought details on the sediment’s quality. The opportunistic genus Paraethmolaimus (Jensen, 1994) strongly correlated to the higher concentrations of Hg, Pb. Anoxic sediments were marked by organic enrichment in pesticides, PCB, and mangrove litter products and dominance of two tolerant genus, Terschellingia (de Man, 1888) and Spirinia (Gerlach, 1963). In each of these two stations, we found many Desmodora individuals (de Man, 1889) with the presence of epibionts highlighting the nematodes decreased fitness and defenses. Oxic sediments without contaminants were distinguished by the sensitive genera Pseudocella (Filipjev, 1927) and a higher diversity of trophic groups. Our results suggested a nematodes sensitivity to low contaminants concentrations. Further investigations at different spatio-temporal scales and levels of deterioration, would be necessary to use of this group as bioindicator of the mangroves’ ecological status. View Full-Text
Keywords: mangroves; biodiversity; meiofauna; nematode; anthropogenic pressures; natural contamination; South America mangroves; biodiversity; meiofauna; nematode; anthropogenic pressures; natural contamination; South America
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MDPI and ACS Style

Michelet, C.; Zeppilli, D.; Hubas, C.; Baldrighi, E.; Cuny, P.; Dirberg, G.; Militon, C.; Walcker, R.; Lamy, D.; Jézéquel, R.; Receveur, J.; Gilbert, F.; Houssainy, A.E.; Dufour, A.; Heimbürger-Boavida, L.-E.; Bihannic, I.; Sylvi, L.; Vivier, B.; Michaud, E. First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana. Forests 2021, 12, 338. https://doi.org/10.3390/f12030338

AMA Style

Michelet C, Zeppilli D, Hubas C, Baldrighi E, Cuny P, Dirberg G, Militon C, Walcker R, Lamy D, Jézéquel R, Receveur J, Gilbert F, Houssainy AE, Dufour A, Heimbürger-Boavida L-E, Bihannic I, Sylvi L, Vivier B, Michaud E. First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana. Forests. 2021; 12(3):338. https://doi.org/10.3390/f12030338

Chicago/Turabian Style

Michelet, Claire; Zeppilli, Daniela; Hubas, Cédric; Baldrighi, Elisa; Cuny, Philippe; Dirberg, Guillaume; Militon, Cécile; Walcker, Romain; Lamy, Dominique; Jézéquel, Ronan; Receveur, Justine; Gilbert, Franck; Houssainy, Amonda E.; Dufour, Aurélie; Heimbürger-Boavida, Lars-Eric; Bihannic, Isabelle; Sylvi, Léa; Vivier, Baptiste; Michaud, Emma. 2021. "First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana" Forests 12, no. 3: 338. https://doi.org/10.3390/f12030338

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