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Carbon dioxide fluxes from contrasting ecosystems in the Sudanian Savanna in West Africa

Quansah, E.; Mauder, M.; Balogun, A.A.; Amekudzi, L.K.; Hingerl, L.; Bliefernicht, J.; Kunstmann, H.

Background: The terrestrial land surface in West Africa is made up of several types of savanna ecosystems differing in land use changes which modulate gas exchanges between their vegetation and the overlying atmosphere. This study compares diurnal and seasonal estimates of CO2 fluxes from three contrasting ecosystems, a grassland, a mixture of fallow and cropland, and nature reserve in the Sudanian Savanna and relate them to water availability and land use characteristics. Results: Over the study period, and for the three study sites, low soil moisture availability, high vapour pressure deficit and low ecosystem respiration were prevalent during the dry season (November to March), but the contrary occurred during the rainy season (May to October). Carbon uptake predominantly took place in the rainy season, while net carbon efflux occurred in the dry season as well as the dry to wet and wet to dry transition periods (AM and ND) respectively. Carbon uptake decreased in the order of the nature reserve, a mixture of fallow and cropland, and grassland. Only the nature reserve ecosystem at the Nazinga Park served as a net sink of CO2, mostly by virtue of a several times larger carbon uptake and ecosystem water use efficiency during the rainy season than at the other sites. ... mehr

Volltext §
DOI: 10.5445/IR/1000051742
DOI: 10.1186/s13021-014-0011-4
Zitationen: 20
Zitationen: 36
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 1750-0680
KITopen-ID: 1000051742
HGF-Programm 12.02.05 (POF III, LK 01) Atmospheric Exchange Processes
Erschienen in Carbon Balance and Management
Verlag BioMed Central (BMC)
Band 10
Heft 1
Seiten 1-17
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Scopus
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