000872979 001__ 872979
000872979 005__ 20220930130228.0
000872979 0247_ $$2Handle$$a2128/24077
000872979 0247_ $$2URN$$aurn:nbn:de:0001-2020012939
000872979 0247_ $$2ISSN$$a1866-1793
000872979 020__ $$a978-3-95806-447-8
000872979 037__ $$aFZJ-2020-00436
000872979 1001_ $$0P:(DE-Juel1)161256$$aWagner, Katrin Xin Xin$$b0$$eCorresponding author$$gfemale$$ufzj
000872979 245__ $$aImpact Assessment of Land-Use Change and Agricultural Treatments on Greenhouse Gas Emissions from Wetlands of Uganda and Tanzania$$f- 2019-10-09
000872979 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2019
000872979 300__ $$a144 S.
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000872979 3367_ $$2DRIVER$$adoctoralThesis
000872979 4900_ $$aSchriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment$$v483
000872979 502__ $$aDissertation, Universität Bonn, 2019$$bDr.$$cUniversität Bonn$$d2019
000872979 520__ $$aWetlands play an important role in global climate regulation as they represent a great global carbon sink. Moreover, wetlands provide optimal conditions for food production and support the livelihoods of many people in Sub-Saharan Africa with food supply. The conversion of natural wetland areas to farmland seriously affects valuable ecosystem services, including global climate regulation, and can result in altered greenhouse gas(GHG) emissions. Therefore, a main challenge of sustainable wetland management is to find a reconciliation between food production and mitigation of GHG emissions. For the development of management recommendations, GHG emission data from wetlands in Sub-Saharan Africa are highly needed, because the numbers of GHG studies conducted in this region are low. This study aimed to reduce this knowledge gap and assessed GHG emissions from wetlands in East Africa with consideration of contrasting wetland types, different types of land use and different hydrological positions within the wetland. Moreover, different agricultural treatments were evaluated with respect to their effects on yield-based GHG emissions. Two field experiments were established in different wetland types in East Africa. The first test site was located in an inland valley wetland in Uganda,while the second one was located in a floodplain of the Kilombero river in Tanzania. CH$_{4}$,CO$_{2}$ and N$_{2}$O emission data were collected with static chambers for a total samplingperiod of two consecutive cropping and fallow periods. During data analysis, a lack of systematic quality assurance of GHG data from static chamber measurements became apparent. Thus, an eight-step data quality management system based on objective criteria was developed to ensure data reliability and improve data acceptance rates. The quality-checked results of this study confirmed that land-use change had a significant impact on GHG emissions, as the global warming potential (GWP) considerably increasedafter the conversion of natural wetlands to farmland. Moreover, this study showed that intensification of food production did not result in significantly higher yield-based GHG emissions. Intensive cropping treatments with fertilizer application showed equally high or even lower global warming potential indexes (GWPI) compared to non-fertilized treatments. In conclusion, intensive cropping management practices with high yield potentials represent a possible trade-off between food production and GHG emissions. However, to achieve GHG emission mitigation, a combination with natural wetland areas spared from agricultural production is essential.
000872979 536__ $$0G:(DE-HGF)POF3-255$$a255 - Terrestrial Systems: From Observation to Prediction (POF3-255)$$cPOF3-255$$fPOF III$$x0
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