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Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators
- Source :
- Science Of The Total Environment (0048-9697) (Elsevier BV), 2022-02, Vol. 807, N. Part. 1, P. 150667 (14p.), Science of the Total Environment, Science of the Total Environment, Elsevier, 2022, 807, pp.150667. ⟨10.1016/j.scitotenv.2021.150667⟩, Science of the Total Environment, 2022, 807, pp.150667. ⟨10.1016/j.scitotenv.2021.150667⟩
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- International audience; 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.
- Subjects :
- Geologic Sediments
Environmental Engineering
[SDE.MCG]Environmental Sciences/Global Changes
Biodiversité et Ecologie
03 medical and health sciences
Dieldrin
chemistry.chemical_compound
Estuarine mangrove sediments
PAHs contamination
Humans
Environmental Chemistry
Organic matter
14. Life underwater
Waste Management and Disposal
030304 developmental biology
chemistry.chemical_classification
Ecologie, Environnement
0303 health sciences
geography
geography.geographical_feature_category
Environmental Biomarkers
biology
Planctomycetes
030306 microbiology
Ecology
Anthropogenic Effects
Microbiota
Organochlorine contaminants
Estuary
15. Life on land
biology.organism_classification
[SDE.ES]Environmental Sciences/Environmental and Society
Pollution
6. Clean water
French Guiana
chemistry
13. Climate action
Wetlands
Low organic matter enrichment
Desulfobacteraceae
Environmental science
Proteobacteria
Mangrove
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Estuaries
Bioindicator
Acidobacteria
Subjects
Details
- Language :
- English
- ISSN :
- 00489697 and 18791026
- Database :
- OpenAIRE
- Journal :
- Science Of The Total Environment (0048-9697) (Elsevier BV), 2022-02, Vol. 807, N. Part. 1, P. 150667 (14p.), Science of the Total Environment, Science of the Total Environment, Elsevier, 2022, 807, pp.150667. ⟨10.1016/j.scitotenv.2021.150667⟩, Science of the Total Environment, 2022, 807, pp.150667. ⟨10.1016/j.scitotenv.2021.150667⟩
- Accession number :
- edsair.doi.dedup.....c31ffe580ac4d60c7ae4c6a47bbf6b47
- Full Text :
- https://doi.org/10.1016/j.scitotenv.2021.150667⟩