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dc.contributor.author
Griepentrog, Marco
dc.contributor.author
Bodé, Samuel
dc.contributor.author
Boudin, Mathieu
dc.contributor.author
Dercon, Gerd
dc.contributor.author
Doetterl, Sebastian
dc.contributor.author
Eglinton, Timothy I.
dc.contributor.author
Haghipour, Negar
dc.contributor.author
Joya, Sebastian
dc.contributor.author
Martin, Victoria
dc.contributor.author
Matulanya, Machibya
dc.contributor.author
Msigwa, Anna
dc.contributor.author
Sun, Xiangyang
dc.contributor.author
Vermeir, Pieter
dc.contributor.author
Wang, Xiaoguo
dc.contributor.author
Richter, Andreas
dc.contributor.author
Boeckx, Pascal
dc.date.accessioned
2020-01-28T12:19:23Z
dc.date.available
2020-01-28T08:25:56Z
dc.date.available
2020-01-28T12:19:23Z
dc.date.issued
2018-04-12
dc.identifier.issn
1029-7006
dc.identifier.issn
1607-7962
dc.identifier.uri
http://hdl.handle.net/20.500.11850/394687
dc.identifier.doi
10.3929/ethz-b-000394687
dc.description.abstract
Terrestrial ecosystems are strongly influenced by climate change and soils are key compartments of the globalcarbon (C) cycle in terms of their potential to store or release significant amounts of C. This study is part ofthe interregional IAEA Technical Cooperation Project INT5153 “Assessing the Impact of Climate Change and itsEffects on Soil and Water Resources in Polar and Mountainous Regions” and aims to elucidate driving factors(climatic versus geochemical) of soil organic carbon (SOC) stabilization and greenhouse gas emissions alongaltitudinal transects in different mountain regions.We present novel data from altitudinal transects of four different mountain regions (Zongo, Cordillera Real, Bo-livia; Mount Kilimanjaro, Tanzania; Gongga, Hengduan Mountains, China; Rauris, Hohe Tauern, Austria). Allaltitudinal transects cover a wide range of natural ecosystems under different climatic (MAT, MAP) and soil geo-chemical parameters. Bulk soil samples (four field replicates per ecosystems) were subjected to a combination ofaggregate and particle-size fractionation followed by organic C, total nitrogen (N), stable isotope (13C,15N) andradiocarbon (14C) analyses of all fractions. Bulk soils were further characterized for their texture, geochemistry(Na, K, Ca, Mg, CECpot, Al, Fe, Mn, Si, pH), nutrient status (NH+4, NO−3, Ptot)and incubated for 63 days to assessgreenhouse gas emissions (CO2, CH4, NO, N2O). Moreover, stable C isotope signatures of CO2were determinedto estimate potential sources of soil respiration (using Keeling plots).Cumulative soil CO2emissions (in gCO2-Ckg−1SOC)were highest for the high altitude grassland and forest sitesof Rauris (25.5-25.8) and lowest for the Kilimanjaro forests (4.8-6.9) as well as Bolivian high altitude grasslands(2.5-4.3). Soil CO2emissions were negatively correlated with SOC content (Pearson correlation coefficient rp=-0.35, p=0.002), showing that soils with low SOC contents release the highest amount of CO2per soil C, possiblydue to large fractions of unprotected SOC and thus low SOC stabilization.Particulate organic matter (POM) and sand content were positively correlated with CO2emissions (rp=0.43,p<0.001 and rp=0.57, p<0.001, respectively) and negatively correlated with SOC content (rp=-0.61, p<0.001for sand content), showing that high amounts of POM and/or a sandy soil texture impede SOC storage and supportCO2emissions. In contrast, microaggregates and clay minerals were negatively correlated with CO2emissions(rp=-0.45, p<0.001 and rp=-0.51, p<0.001, respectively) and positively correlated with SOC content (rp=0.84,p<0.001 for clay content), showing their importance for SOC stabilization.Cation exchange capacity (CEC) was positively correlated with SOC content (rp=0.93, p<0.001) and negativelycorrelated with CO2emissions (rp=-0.41, p<0.001). Oppositely, both Si content and the Si/Al ratio were negatively correlated with SOC content (rp=-0.86, p<0.001 and rp=-0.56, p<0.001, respectively) and positively correlatedwith CO2emissions (rp=0.36, p=0.002 and rp=0.34, p=0.003). These relationships point towards an important roleof soil weathering and geochemistry for the potential of soils to store SOC or release CO2.Further results of soil fractionation, greenhouse gas emissions and geochemistry will be presented in conjunctionwith climatic data of the altitudinal transects to elucidate driving factors of SOC (de)stabilization in high altitudemountain regions.
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/4.0/
dc.title
Climatic versus geochemical controls on soil organic matter stabilization and greenhouse gas emissions along altitudinal transects in different mountain regions
en_US
dc.type
Other Conference Item
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Geophysical Research Abstracts
ethz.journal.volume
20
en_US
ethz.journal.abbreviated
GRA
ethz.pages.start
EGU2018-12981
en_US
ethz.size
2 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.event
EGU General Assembly 2018
en_US
ethz.event.location
Vienna, Austria
en_US
ethz.event.date
April 8-13, 2018
en_US
ethz.notes
Conference lecture held on april 12, 2018
en_US
ethz.grant
Sources and proportions of modern and aged organic carbon eroded from soils under different land-use within catchments in Nepal – Insights from compound-specific 13C & 14C analysis and novel mixing models
en_US
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::02722 - Institut für Terrestrische Oekosysteme / Institute of Terrestrial Ecosystems::09646 - Dötterl, Sebastian / Dötterl, Sebastian
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03868 - Eglinton, Timothy I. / Eglinton, Timothy I.
en_US
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
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03868 - Eglinton, Timothy I. / Eglinton, Timothy I.
en_US
ethz.grant.agreementno
174300
ethz.grant.agreementno
174300
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Rückkehr CH Advanced Postdoc.Mobility
ethz.date.deposited
2020-01-28T08:26:05Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-01-28T12:19:34Z
ethz.rosetta.lastUpdated
2022-03-29T00:52:02Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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