Peat Particulate Organic Matter Accepts Electrons During In Situ Incubation in the Anoxic Subsurface of Ombrotrophic Bogs
dc.contributor.author
Obradović, Nikola
dc.contributor.author
Schmitz, Robert Alexander
dc.contributor.author
Haffter, Frédéric
dc.contributor.author
Meier, Dimitri
dc.contributor.author
Lever, Mark
dc.contributor.author
Schroth, Martin Herbert
dc.contributor.author
Sander, Michael
dc.date.accessioned
2024-09-23T13:04:22Z
dc.date.available
2024-09-21T06:07:20Z
dc.date.available
2024-09-23T13:04:22Z
dc.date.issued
2024-09
dc.identifier.issn
0148-0227
dc.identifier.issn
2169-8953
dc.identifier.issn
2169-8961
dc.identifier.other
10.1029/2024JG008223
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/695331
dc.identifier.doi
10.3929/ethz-b-000695331
dc.description.abstract
Peat particulate organic matter (POM) in the anoxic subsurface of peatlands is increasingly recognized as an important terminal electron acceptor (TEA) in anaerobic respiration. While POM reduction has been demonstrated in laboratory peat-soil incubations and (electro-) chemical reduction assays, direct demonstration of POM reduction in peat soils under in situ, field conditions involving quantification of transferred electrons remain missing. Herein, we demonstrate that deployment of an oxidized reference POM in the anoxic, methanogenic subsurface of three ombrotrophic bogs, followed by one year incubation, resulted in the transfer of approximately 150-170 mu mol of electrons per gram POM to the deployed reference POM. The capacity of this reduced POM to accept electrons was partially restored upon subsequent exposure to dissolved oxygen. These findings provide direct evidence for POM acting as regenerable and sustainable TEA for anaerobic respiration in temporarily anoxic parts of peat soils. Based on the number of electrons transferred to POM and thermodynamic considerations, we estimate that anaerobic respiration to POM may largely suppress methanogenesis in peat soils, particularly close to the oxic-anoxic interface across which POM is expected to undergo redox cycling.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Geophysical Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
redox
en_US
dc.subject
ombrotrophic bog
en_US
dc.subject
particulate organic matter
en_US
dc.subject
dissolved oxygen
en_US
dc.subject
electron-accepting capacity
en_US
dc.subject
methane
en_US
dc.title
Peat Particulate Organic Matter Accepts Electrons During In Situ Incubation in the Anoxic Subsurface of Ombrotrophic Bogs
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2024-09-13
ethz.journal.title
Journal of Geophysical Research: Biogeosciences
ethz.journal.volume
129
en_US
ethz.journal.issue
9
en_US
ethz.journal.abbreviated
J. geophys. res. Biogeosciences
ethz.pages.start
e2024JG008223
en_US
ethz.size
15 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Electron transfer to and from peat particulate organic matter in ombrotrophic bogs: characterization and impact on carbon dioxide and methane concentrations
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03850 - McNeill, Kristopher / McNeill, Kristopher
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03850 - McNeill, Kristopher / McNeill, Kristopher
ethz.grant.agreementno
182645
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.relation.isSupplementedBy
10.3929/ethz-b-000690096
ethz.date.deposited
2024-09-21T06:07:28Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2024-09-23T13:06:33Z
ethz.rosetta.lastUpdated
2025-01-27T08:39:28Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Peat%20Particulate%20Organic%20Matter%20Accepts%20Electrons%20During%20In%20Situ%20Incubation%20in%20the%20Anoxic%20Subsurface%20of%20Ombrotrophic%20Bogs&rft.jtitle=Journal%20of%20Geophysical%20Research:%20Biogeosciences&rft.date=2024-09&rft.volume=129&rft.issue=9&rft.spage=e2024JG008223&rft.issn=0148-0227&2169-8953&2169-8961&rft.au=Obradovi%C4%87,%20Nikola&Schmitz,%20Robert%20Alexander&Haffter,%20Fr%C3%A9d%C3%A9ric&Meier,%20Dimitri&Lever,%20Mark&rft.genre=article&rft_id=info:doi/10.1029/2024JG008223&
Files in this item
Publication type
-
Journal Article [133574]