Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean)
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...
Published in: | Environmental Pollution |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039/document https://hal.archives-ouvertes.fr/hal-02543039/file/S0269749119367430.pdf https://doi.org/10.1016/j.envpol.2020.114333 |
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ftunivnantes:oai:HAL:hal-02543039v1 2023-05-15T17:34:09+02:00 Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) Azaroff, Alyssa Goñi, Marisol Gassie, Claire Monperrus, Mathilde Guyoneaud, Remy 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) 2020-07 https://hal.archives-ouvertes.fr/hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039/document https://hal.archives-ouvertes.fr/hal-02543039/file/S0269749119367430.pdf https://doi.org/10.1016/j.envpol.2020.114333 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2020.114333 hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039/document https://hal.archives-ouvertes.fr/hal-02543039/file/S0269749119367430.pdf doi:10.1016/j.envpol.2020.114333 PII: S0269-7491(19)36743-0 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess CC-BY-NC ISSN: 0269-7491 EISSN: 1873-6424 Environmental Pollution https://hal.archives-ouvertes.fr/hal-02543039 Environmental Pollution, Elsevier, 2020, 262, pp.114333. ⟨10.1016/j.envpol.2020.114333⟩ 16S rDNA diversity Hg-methylating prokaryotes HgcA diversity Marine sediments Mercury-methylation [CHIM.POLY]Chemical Sciences/Polymers [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1016/j.envpol.2020.114333 2022-11-09T00:15:22Z 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. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Environmental Pollution 262 114333 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
16S rDNA diversity Hg-methylating prokaryotes HgcA diversity Marine sediments Mercury-methylation [CHIM.POLY]Chemical Sciences/Polymers [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry |
spellingShingle |
16S rDNA diversity Hg-methylating prokaryotes HgcA diversity Marine sediments Mercury-methylation [CHIM.POLY]Chemical Sciences/Polymers [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry Azaroff, Alyssa Goñi, Marisol Gassie, Claire Monperrus, Mathilde Guyoneaud, Remy Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
topic_facet |
16S rDNA diversity Hg-methylating prokaryotes HgcA diversity Marine sediments Mercury-methylation [CHIM.POLY]Chemical Sciences/Polymers [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry |
description |
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. |
author2 |
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) |
format |
Article in Journal/Newspaper |
author |
Azaroff, Alyssa Goñi, Marisol Gassie, Claire Monperrus, Mathilde Guyoneaud, Remy |
author_facet |
Azaroff, Alyssa Goñi, Marisol Gassie, Claire Monperrus, Mathilde Guyoneaud, Remy |
author_sort |
Azaroff, Alyssa |
title |
Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
title_short |
Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
title_full |
Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
title_fullStr |
Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
title_full_unstemmed |
Marine mercury-methylating microbial communities from coastal to Capbreton Canyon sediments (North Atlantic Ocean) |
title_sort |
marine mercury-methylating microbial communities from coastal to capbreton canyon sediments (north atlantic ocean) |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039/document https://hal.archives-ouvertes.fr/hal-02543039/file/S0269749119367430.pdf https://doi.org/10.1016/j.envpol.2020.114333 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0269-7491 EISSN: 1873-6424 Environmental Pollution https://hal.archives-ouvertes.fr/hal-02543039 Environmental Pollution, Elsevier, 2020, 262, pp.114333. ⟨10.1016/j.envpol.2020.114333⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2020.114333 hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039 https://hal.archives-ouvertes.fr/hal-02543039/document https://hal.archives-ouvertes.fr/hal-02543039/file/S0269749119367430.pdf doi:10.1016/j.envpol.2020.114333 PII: S0269-7491(19)36743-0 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1016/j.envpol.2020.114333 |
container_title |
Environmental Pollution |
container_volume |
262 |
container_start_page |
114333 |
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1766132901876858880 |