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dc.contributor.author
Gilgen, Anna K.
dc.contributor.author
Buchmann, Nina
dc.date.accessioned
2019-03-07T10:01:06Z
dc.date.available
2017-06-08T22:46:06Z
dc.date.available
2019-03-07T10:01:06Z
dc.date.issued
2009
dc.identifier.issn
1810-6277
dc.identifier.issn
1810-6285
dc.identifier.uri
http://hdl.handle.net/20.500.11850/17858
dc.identifier.doi
10.3929/ethz-b-000017858
dc.description.abstract
Water is an important resource for plant live. Since climate scenarios for Switzerland predict an average reduction of 20% in summer precipitation until 2070, understanding ecosystem responses to water shortage, e.g. in terms of plant productivity, is of major concern. Thus, we tested the effects of simulated summer drought on three managed grasslands along an altitudinal gradient in Switzerland from 2005 to 2007, representing typical management intensities at the respective altitude. We assessed the effects of drought on above- and below-ground productivity, stand structure (LAI and vegetation height) and resource use (carbon and water). Drought responses of community above-ground productivity differed among the three sites but scaled positively with total annual precipitation at the sites (<i>R</i><sup>2</sup>=0.85). Annual community above-ground biomass productivity was significantly reduced by summer drought at the alpine site receiving the least amount of annual precipitation, while no significant decrease (rather an increase) was observed at the pre-alpine site receiving highest precipitation amounts in all three years. At the lowland site (intermediate precipitation sums), biomass productivity significantly decreased in response to drought only in the third year, after showing increased abundance of a drought tolerant weed species in the second year. No significant change in below-ground biomass productivity was observed at any of the sites in response to simulated summer drought. However, community carbon isotope ratios increased under drought conditions, indicating an increase in water use efficiency. We conclude that there is no general drought response of Swiss grasslands, but that sites with lower annual precipitation seem to be more vulnerable to summer drought than sites with higher annual precipitation, and thus site-specific adaptation measures will be needed especially in regions with low annual precipitation.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Response of temperate grasslands at different altitudes to simulated summer drought differed but scaled with annual precipitation
en_US
dc.type
Working Paper
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2009-11-09
ethz.journal.title
Biogeosciences Discussions
ethz.journal.volume
6
en_US
ethz.journal.issue
3
en_US
ethz.journal.abbreviated
Biogeosci. discuss.
ethz.pages.start
5217
en_US
ethz.pages.end
5250
en_US
ethz.size
34 p.
en_US
ethz.publication.place
Katlenburg-Lindau; 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.relation.isPreviousVersionOf
20.500.11850/15683
ethz.date.deposited
2017-06-08T22:46:17Z
ethz.source
ECIT
ethz.identifier.importid
imp59364c8371b5e79932
ethz.ecitpid
pub:29935
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-19T07:52:17Z
ethz.rosetta.lastUpdated
2019-03-07T10:01:35Z
ethz.rosetta.versionExported
true
ethz.COinS
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