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Mercury methylating...
Mercury methylating microbial communities in boreal wetlands
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- Jingying, Xu, 1984- (författare)
- Uppsala universitet,Limnologi
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- Liem-Nguyen, Van (författare)
- School of Science and Technology, Örebro University, Örebro, Sweden,School of Science and Technology, Örebro University, SE-701 82 Örebro, Sweden
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- Buck, Moritz (författare)
- Uppsala universitet,Limnologi
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visa fler...
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- Bertilsson, Stefan (författare)
- Uppsala universitet,Limnologi
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- Björn, Erik (författare)
- Faculty of Science and Technology, Department of Chemistry, Umeå University, Sweden
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- Bravo, Andrea Garcia (författare)
- Uppsala universitet,Limnologi,Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA), Spanish National Research Council (CSIC), Barcelona, Spain
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visa färre...
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Understanding the formation of the potent neurotoxic methylmercury (MeHg) is a major concern due to its threats to wildlife and human health. As boreal wetlands play a crucial role for Hg cycling on a global scale, it is crucial to understand the biogeochemical processes involved in MeHg formation in this landscape. A strategy combining high-throughput hgcA amplicon sequencing with molecular barcoding was used to revealed diverse clades of Hg(II) methylators in a wide range of wetland soils. Our results confirms a predominant role of Deltaproteobacteria, and in particular Geobacteraceae, as important Hg(II) methylators in boreal wetland soils. Firmicutes, and in particular Ruminococcaceae, were also abundant members of the Hg(II) methylating microbial communities. Our survey highlight the importance of nutrient status for the shaping of Hg(II) methylating communities across the four wetlands and reveal that water content and prevailing redox states are key factors determining the local variation in Hg(II) methylating community composition within individual wetlands. Also, our study suggests that high nutrient levels linked to low redox potential seemed to favour Hg(II) methylating methanogens within the Methanoregulaceae. Our findings expand the current knowledge on the Hg(II) methylating microbial community composition in wetland soils and the geochemical factors underpinning spatial heterogeity in such communities.
Ämnesord
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Nyckelord
- Wetlands
- Methylmercury
- Mercury methylation
- hgcA
- Community composition
- Bacteria
- Biology with specialization in Limnology
- Biologi med inriktning mot limnologi
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)