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Opposing spatial tr...
Opposing spatial trends in methylmercury and total mercury along a peatland chronosequence trophic gradient
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- Wang, Baolin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
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- Nilsson, Mats (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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- Eklöf, Karin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
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- Hu, Haiyan (author)
- Uppsala universitet,Limnologi,Science for Life Laboratory, SciLifeLab,Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
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- Ehnvall, Betty (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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- Bravo, Andrea G. (author)
- Inst Ciencies Mar ICM CSIC, Dept Marine Biol & Oceanog, Pg Maritim Barceloneta 37-49, E-08003 Barcelona, Catalunya, Spain.
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- Zhong, Shunqing (author)
- Hengyang Normal Univ, Coll City & Tourism, Hengyang 421002, Peoples R China.
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- Åkerblom, Staffan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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- Björn, Erik (author)
- Umeå universitet,Kemiska institutionen,Umea Univ, Dept Chem, SE-90187 Umea, Sweden.
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- Bertilsson, Stefan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Uppsala universitet,Limnologi,Science for Life Laboratory, SciLifeLab,Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, SE-75007 Uppsala, Sweden,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Uppsala University
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- Skyllberg, Ulf (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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- Bishop, Kevin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
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(creator_code:org_t)
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- Elsevier BV, 2020
- 2020
- English.
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In: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 718
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https://doi.org/10.1...
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Abstract
Subject headings
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- Peatlands are abundant elements of boreal landscapes where inorganic mercury (IHg) can be transformed into bioaccumulating and highly toxic methylmercury (MeHg). We studied fifteen peatlands divided into three age lasses (young, intermediate and old) along a geographically constrained chronosequence to determine the role of biogeochemical factors and nutrient availability in controlling the formation of MeHg. In the 10 cm soil layer just below the average annual growing season water table, concentrations of MeHg and %MeHg (of total Hg) were higher in younger, more mesotrophic peatlands than in older, more oligotrophic peatlands. In contrast, total mercury (THg) concentrations were higher in the older peatlands. Partial least squares (PLS) analysis indicates that the net MeHg production was positively correlated to trophic demands of vegetation and an increased availability of potential electron acceptors and donors for Hg methylating microorganisms. An important question for further studies will be to elucidate why there is less THg in the younger peatlands compared to the older peatlands, even though the age of the superficial peat itself is similar for all sites. We hypothesize that ecosystem features which enhance microbial processes involved in Hg methylation also promote Hg reduction that makes previously deposited Hg more available for evasion back to the atmosphere.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
Keyword
- Peatland
- Mercury
- Methylation
- Methylmercury
- Chronosequence
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Wang, Baolin
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Nilsson, Mats
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Eklöf, Karin
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Hu, Haiyan
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Ehnvall, Betty
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Bravo, Andrea G.
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show more...
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Zhong, Shunqing
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Åkerblom, Staffa ...
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Björn, Erik
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Bertilsson, Stef ...
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Skyllberg, Ulf
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Bishop, Kevin
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Forest Science
- Articles in the publication
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Science of the T ...
- By the university
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Uppsala University
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Umeå University
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Swedish University of Agricultural Sciences