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dc.contributor.author
Oost, K. van
dc.contributor.author
Doetterl, Sebastian
dc.contributor.author
Cornélis, Jean Thomas
dc.contributor.author
Six, Johan
dc.contributor.author
Bodé, Samuel
dc.contributor.author
Opfergelt, Sophie
dc.contributor.author
Boeckx, Pascal
dc.contributor.author
Van Oost, Kristof
dc.date.accessioned
2018-10-01T16:39:35Z
dc.date.available
2017-06-11T17:04:37Z
dc.date.available
2018-10-01T16:39:35Z
dc.date.issued
2015
dc.identifier.issn
1726-4170
dc.identifier.issn
1726-4170
dc.identifier.other
10.5194/bg-12-1357-2015
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/100221
dc.identifier.doi
10.3929/ethz-b-000100221
dc.description.abstract
The role of eroding landscapes in organic carbon stabilization operating as C sinks or sources has been frequently discussed, but the underlying mechanisms are not fully understood. Our analysis aims to clarify the effects of soil redistribution on physical and biogeochemical soil organic carbon (SOC) stabilization mechanisms along a hillslope transect. The observed mineralogical differences seem partly responsible for the effectiveness of geochemical and physical SOC stabilization mechanisms as the mineral environment along the transect is highly variable and dynamic. The abundance of primary and secondary minerals and the weathering status of the investigated soils differ drastically along this transect. Extractable iron and aluminum components are generally abundant in aggregates, but show no strong correlation to SOC, indicating their importance for aggregate stability but not for SOC retention. We further show that pyrophosphate extractable soil components, especially manganese, play a role in stabilizing SOC within non-aggregated mineral fractions. The abundance of microbial residues and measured 14C ages for aggregated and non-aggregated SOC fractions demonstrate the importance of the combined effect of geochemical and physical protection to stabilize SOC after burial at the depositional site. Mineral alteration and the breakdown of aggregates limit the protection of C by minerals and within aggregates temporally. The 14C ages of buried soil indicate that C in aggregated fractions seems to be preserved more efficiently while C in non-aggregated fractions is released, allowing a re-sequestration of younger C with this fraction. Old 14C ages and at the same time high contents of microbial residues in aggregates suggest either that microorganisms feed on old carbon to build up microbial biomass or that these environments consisting of considerable amounts of old C are proper habitats for microorganisms and preserve their residues. Due to continuous soil weathering and, hence, weakening of protection mechanisms, a potential C sink through soil burial is finally temporally limited.
en_US
dc.format
application/pdf
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Soil redistribution and weathering controlling the fate of geochemical and physical carbon stabilization mechanisms in soils of an eroding landscape
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2015-03-04
ethz.journal.title
Biogeosciences
ethz.journal.volume
12
en_US
ethz.journal.issue
5
en_US
ethz.pages.start
1357
en_US
ethz.pages.end
1371
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
006289717
ethz.publication.place
Göttingen
en_US
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::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03982 - Six, Johan / Six, Johan
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02722 - Institut für Terrestrische Oekosysteme / Institute of Terrestrial Ecosystems::09646 - Dötterl, Sebastian / Dötterl, Sebastian
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03982 - Six, Johan / Six, Johan
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02722 - Institut für Terrestrische Oekosysteme / Institute of Terrestrial Ecosystems::09646 - Dötterl, Sebastian / Dötterl, Sebastian
ethz.date.deposited
2017-06-11T17:05:20Z
ethz.source
ECIT
ethz.identifier.importid
imp5936531d4712126944
ethz.ecitpid
pub:157146
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-26T06:04:48Z
ethz.rosetta.lastUpdated
2022-03-28T21:23:58Z
ethz.rosetta.versionExported
true
ethz.COinS
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