Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean)
| العنوان: | Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
|---|---|
| المؤلفون: | Mathilde Monperrus, Claire Gassie, Rémy Guyoneaud, Alyssa Azaroff, Marisol Goñi Urriza |
| المساهمون: | Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Adour Garonne Water Agency (Micropolit Project) |
| المصدر: | Environmental Pollution Environmental Pollution, Elsevier, 2020, 262, pp.114333. ⟨10.1016/j.envpol.2020.114333⟩ |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Geologic Sediments, 010504 meteorology & atmospheric sciences, Health, Toxicology and Mutagenesis, chemistry.chemical_element, Submarine canyon, 010501 environmental sciences, Toxicology, Deltaproteobacteria, 01 natural sciences, chemistry.chemical_compound, Marine sediments, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Marine ecosystem, 14. Life underwater, Mercury-methylation, Methylmercury, Atlantic Ocean, Hg-methylating prokaryotes, 0105 earth and related environmental sciences, geography, geography.geographical_feature_category, biology, Bacteria, Ecology, Microbiota, Verrucomicrobia, Sulfur cycle, 16S rDNA diversity, General Medicine, [CHIM.MATE]Chemical Sciences/Material chemistry, Mercury, Methylmercury Compounds, biology.organism_classification, Pollution, Anoxic waters, Mercury (element), [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, 13. Climate action, HgcA diversity, Environmental science, Water Pollutants, Chemical |
| الوصف: | International audience; Microbial mercury (Hg) methylation transforms inorganic mercury to neurotoxic methylmercury (MeHg) mainly in aquatic anoxic environments. Sampling challenges in marine ecosystems, particularly in submarine canyons, leads to a lack of knowledge about the Hg methylating microbia in marine sediments. A previous study showed an enrichment of mercury species in sediments from the Capbreton Canyon where both geochemical parameters and microbial activities constrained the net MeHg production. In order to characterize Hg-methylating microbial communities from coastal to deeper sediments, we analysed the diversity of microorganisms’ (16S rDNA-based sequencing) and Hg methylators (hgcA based cloning and sequencing). Both, 16S rDNA and hgcA gene analysis demonstrated that the putative Hg-methylating prokaryotes were likely within the Deltaproteobacteria, dominated by sulfur-compounds based reducing bacteria (mainly sulfate reducers). Additionally, others clades were also identified as carrying HgcA gene, such as, Chloroflexi, Spirochaetes, Elusimicrobia, PVC superphylum (Plantomycetes, Verrucomicrobia and Chlamydiae) and Euryarchaea. Nevertheless, 61% of the hgcA sequences were not assigned to specific clade, indicating that further studies are needed to understand the implication of new microorganisms carrying hgcA in the Hg methylation in marine environments. These first results suggest that sulfur cycle drives the Hg-methylation in marine ecosystem. |
| تدمد: | 1873-6424 0269-7491 |
| DOI: | 10.1016/j.envpol.2020.114333⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f693445d4696b11bcf705ca9f5bc766 https://pubmed.ncbi.nlm.nih.gov/32443198 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....8f693445d4696b11bcf705ca9f5bc766 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18736424 02697491 |
|---|---|
| DOI: | 10.1016/j.envpol.2020.114333⟩ |