Search: onr:"swepub:oai:DiVA.org:umu-185446" >
Biogeochemical infl...
Biogeochemical influences on net methylmercury formation proxies along a peatland chronosequence
-
- Wang, Baolin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
-
- Zhong, Shunqing (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Hengyang Normal University
-
- Bishop, Kevin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
-
show more...
-
- Nilsson, Mats (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
-
- Hu, Haiyan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Guiyang Institute of Geochemistry, CAS
-
- Eklöf, Karin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
-
- Bravo, Andrea G. (author)
- Department of Marine Biology and Oceanography, Institut de Ciències del Mar (ICM-CSIC), Pg Marítim de la Barceloneta 37-49, Catalunya, Barcelona, Spain
-
- Åkerblom, Staffan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
-
- Bertilsson, Stefan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
-
- Björn, Erik (author)
- Umeå universitet,Kemiska institutionen
-
- Skyllberg, Ulf (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
-
show less...
-
(creator_code:org_t)
-
- Elsevier, 2021
- 2021
- English.
-
In: Geochimica et Cosmochimica Acta. - : Elsevier. - 0016-7037 .- 1872-9533 .- 0046-564X. ; 308, s. 188-203
- Related links:
-
https://doi.org/10.1...
-
show more...
-
https://umu.diva-por... (primary) (Raw object)
-
https://doi.org/10.1...
-
https://pub.epsilon.... (primary) (Raw object) (free)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://res.slu.se/i...
-
show less...
Abstract
Subject headings
Close
- A geographically constrained chronosequence of peatlands divided into three age classes (young, intermediate and old) was used to explore the role of biogeochemical influences, including electron donors and acceptors as well as chemical speciation of inorganic mercury (Hg(II)), on net formation of methylmercury (MeHg) as approximated by the fraction of MeHg to total mercury (THg) in the peat soil. We hypothesized that removing vascular plants would reduce availability of electron donors and thus net MeHg formation. However, we found no effect of the vascular plant removal. The sum of the potential electron donors (acetate, lactate, propionate and oxalate), the electron donation proxy organic C/Organic N, and the potential electron acceptors (Fe(III), Mn and sulfate) in porewater all showed significant correlations with the net MeHg formation proxies in peat soil (MeHg concentration and %MeHg of THg). Thus differences in both electron donor and acceptor availability may be contributing to the pattern of net MeHg formation along the chronosequence. In contrast, Hg(II) concentrations in peat porewater showed small differences along the gradient. A chemical speciation model successfully predicted the solubility of Hg and MeHg in the porewater. The modeling pointed to an enhanced concentration of Hg-polysulfide species in the younger peatlands as a potential factor behind increased Hg(II) solubility and methylation in the more nutrient-rich peatlands. This work contributes to the understanding of Hg and MeHg cycling in peatlands which can help guide mitigation measures to reduce aquatic MeHg biomagnification in peatland dominated landscapes.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
Keyword
- Chemical speciation
- Chronosequence
- Hg solubility
- Mercury
- Methylmercury
- Peatland
- Porewater
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Wang, Baolin
-
Zhong, Shunqing
-
Bishop, Kevin
-
Nilsson, Mats
-
Hu, Haiyan
-
Eklöf, Karin
-
show more...
-
Bravo, Andrea G.
-
Åkerblom, Staffa ...
-
Bertilsson, Stef ...
-
Björn, Erik
-
Skyllberg, Ulf
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Geochemistry
-
- AGRICULTURAL SCIENCES
-
AGRICULTURAL SCI ...
-
and Agriculture Fore ...
-
and Forest Science
- Articles in the publication
-
Geochimica et Co ...
- By the university
-
Umeå University
-
Swedish University of Agricultural Sciences