1
|
Fiard M, Cuny P, Sylvi L, Hubas C, Jézéquel R, Lamy D, Walcker R, El Houssainy A, Heimbürger-Boavida LE, Robinet T, Bihannic I, Gilbert F, Michaud E, Dirberg G, Militon C. Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators. Sci Total Environ 2022; 807:150667. [PMID: 34599952 DOI: 10.1016/j.scitotenv.2021.150667] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 07/26/2021] [Revised: 09/13/2021] [Accepted: 09/25/2021] [Indexed: 06/13/2023]
Abstract
The microbial communities inhabiting the Atlantic-East Pacific (AEP) mangroves have been poorly studied, and mostly comprise chronically polluted mangroves. In this study, we characterized changes in the structure and diversity of microbial communities of mangroves along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America) that experience low human impact. The microbial communities were assigned into 50 phyla. Proteobacteria, Chloroflexi, Acidobacteria, Bacteroidetes, and Planctomycetes were the most abundant taxa. The environmental determinants found to significantly correlated to the microbial communities at these mangroves were granulometry, dieldrin concentration, pH, and total carbon (TC) content. Furthermore, a precise analysis of the sediment highlights the existence of three types of anthropogenic pressure among the stations: (i) organic matter (OM) enrichment due to the proximity to the city and its wastewater treatment plant, (ii) dieldrin contamination, and (iii) naphthalene contamination. These forms of weak anthropogenic pressure seemed to impact the bacterial population size and microbial assemblages. A decrease in Bathyarchaeota, "Candidatus Nitrosopumilus", and Nitrospira genera was observed in mangroves subjected to OM enrichment. Mangroves polluted with organic contaminants were enriched in Desulfobacteraceae, Desulfarculaceae, and Acanthopleuribacteraceae (with dieldrin or polychlorobiphenyl contamination), and Chitinophagaceae and Geobacteraceae (with naphthalene contamination). These findings provide insights into the main environmental factors shaping microbial communities of mangroves in the AEP that experience low human impact and allow for the identification of several potential microbial bioindicators of weak anthropogenic pressure.
Collapse
Affiliation(s)
- Maud Fiard
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | - Philippe Cuny
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | - Léa Sylvi
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | - Cédric Hubas
- 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.
| | | | - Dominique Lamy
- Biologie des Organismes et Ecosystèmes Aquatiques (UMR 8067 BOREA) Muséum National D'Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Rue Buffon, 75005 Paris, France; Institute of Ecology and Environmental Sciences of Paris (iEES-Paris), Sorbonne Université, Univ Paris Est Créteil, IRD, CNRS, INRA, 4 place Jussieu, 75005 Paris, France.
| | - Romain Walcker
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France.
| | - Amonda El Houssainy
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | | | - Tony Robinet
- 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.
| | | | - Franck Gilbert
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France.
| | - Emma Michaud
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, 29280 Plouzané, France.
| | - Guillaume Dirberg
- Biologie des Organismes et Ecosystèmes Aquatiques (UMR 8067 BOREA) Muséum National D'Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Rue Buffon, 75005 Paris, France.
| | - Cécile Militon
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| |
Collapse
|