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dc.contributor.author
Joos, Ottmar
dc.contributor.author
Hagedorn, Frank
dc.contributor.author
Heim, Alexander
dc.contributor.author
Gilgen, Anna Katarina
dc.contributor.author
Schmidt, Michael W.I.
dc.contributor.author
Siegwolf, Rolf
dc.contributor.author
Buchmann, Nina
dc.date.accessioned
2018-09-28T16:14:04Z
dc.date.available
2017-06-08T22:41:32Z
dc.date.available
2018-09-28T16:14:04Z
dc.date.issued
2010
dc.identifier.issn
1726-4170
dc.identifier.issn
1726-4170
dc.identifier.other
10.5194/bg-7-1031-2010
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/17629
dc.identifier.doi
10.3929/ethz-b-000017629
dc.description.abstract
Current climate change models predict significant changes in rainfall patterns across Europe. To explore the effect of drought on soil CO2 efflux (FSoil) and on the contribution of litter to FSoil we used rain shelters to simulate a summer drought (May to July 2007) in an intensively managed grassland in Switzerland by reducing annual precipitation by around 30% similar to the hot and dry year 2003 in Central Europe. We added 13C-depleted as well as unlabelled grass/clover litter to quantify the litter-derived CO2 efflux (FLitter). Soil CO2 efflux and the 13C/12C isotope ratio (δ13C) of the respired CO2 after litter addition were measured during the growing season 2007. Drought significantly decreased FSoil in our litter addition experiment by 59% and FLitter by 81% during the drought period itself (May to July), indicating that drought had a stronger effect on the CO2 release from litter than on the belowground-derived CO2 efflux (FBG, i.e. soil organic matter (SOM) and root respiration). Despite large bursts in respired CO2 induced by the rewetting after prolonged drought, drought also reduced FSoil and FLitter during the entire 13C measurement period (April to October) by 26% and 37%, respectively. Overall, our findings show that drought decreased FSoil and altered its seasonality and its sources. Thus, the C balance of temperate grassland soils respond sensitively to changes in precipitation, a factor that needs to be considered in regional models predicting the impact of climate change on ecosystems C balance.
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
Summer drought reduces total and litter-derived soil CO2 effluxes in temperate grassland - Clues from a C-13 litter addition experiment
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2010-03-17
ethz.journal.title
Biogeosciences
ethz.journal.volume
7
en_US
ethz.journal.issue
3
en_US
ethz.pages.start
1031
en_US
ethz.pages.end
1041
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
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::03648 - Buchmann, Nina / Buchmann, Nina
en_US
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::03648 - Buchmann, Nina / Buchmann, Nina
ethz.date.deposited
2017-06-08T22:41:51Z
ethz.source
ECIT
ethz.identifier.importid
imp59364c7e7c8e928372
ethz.ecitpid
pub:29612
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T17:32:23Z
ethz.rosetta.lastUpdated
2021-02-15T01:55:57Z
ethz.rosetta.versionExported
true
ethz.COinS
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