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dc.contributor.author
Maier, Annina
dc.contributor.supervisor
Doetterl, Sebastian
dc.contributor.supervisor
Griepentrog, Marco
dc.date.accessioned
2021-02-24T08:11:45Z
dc.date.available
2021-02-23T12:02:08Z
dc.date.available
2021-02-24T08:11:45Z
dc.date.issued
2020-09-04
dc.identifier.uri
http://hdl.handle.net/20.500.11850/471075
dc.description.abstract
Tropical African soils contain some of the largest worldwide soil organic carbon (SOC) stocks within the first meter of soil, making them relevant to the global carbon cycle. Here, the effect of these tropical carbon stocks on dissolved organic carbon (DOC) and dissolved nitrogen (DN) concentrations of tropical forest plateau and mid-slope soils are quantified within three geochemically distinct regions (felsic, mixed sedimentary rocks and mafic), located in the eastern part of the Democratic Republic of the Congo (DRC), Rwanda and Uganda. Additionally, the potential connection between DOC concentration and carbon dioxide (CO2) respiration is examined. DOC concentration was found to vary significantly depending on the geochemical region and increased significantly with depth. DN also varied significantly depending on the geochemical region yet did not show any significant depth-dependent trend. The largest concentration of DOC and DN were found in soils of mafic geochemistry, intermediate amounts in soils of mixed sedimentary rocks geochemistry and the lowest amounts in soils of felsic geochemistry. These differences were attributed to the different amounts of clay minerals, aluminum and iron pedogenic oxides in the soils of the different geochemical regions that stabilize dissolved organic matter (DOM) through sorptive processes. No overall significant correlation between DOC and CO2-C respiration was found. However, a positive and significant correlation between DOC and CO2-C exists within the 10 cm depth increments. Further analyses are required to confirm if the findings of this thesis accurately represent DOC and DN concentrations under field conditions.
en_US
dc.language.iso
en
en_US
dc.subject
Geochemistry
en_US
dc.subject
DOC
en_US
dc.subject
Soil chemistry
en_US
dc.subject
Carbon stabilization
en_US
dc.title
Geochemistry as a Control on Dissolved Organic Carbon and Dissolved Nitrogen in African Tropical Forest Soils
en_US
dc.type
Bachelor Thesis
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.date.deposited
2021-02-23T12:02:25Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Closed access
en_US
ethz.date.embargoend
9999-12-31
ethz.rosetta.exportRequired
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Geochemistry%20as%20a%20Control%20on%20Dissolved%20Organic%20Carbon%20and%20Dissolved%20Nitrogen%20in%20African%20Tropical%20Forest%20Soils&rft.date=2020-09-04&rft.au=Maier,%20Annina&rft.genre=unknown&rft.btitle=Geochemistry%20as%20a%20Control%20on%20Dissolved%20Organic%20Carbon%20and%20Dissolved%20Nitrogen%20in%20African%20Tropical%20Forest%20Soils
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