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Land-use change and Biogeochemical controls of soil CO2, N2O and CH4 fluxes in Cameroonian forest landscapes

Verchot, L. V.; Dannenmann, M.; Kengdo, S. K.; Njine-Bememba, C. B.; Rufino, M. C.; Sonwa, D. J.; Tejedor, J.

Abstract:
Deforestation and land-use change are accelerating in the Congo Basin and elsewhere in the tropics affecting the soil-atmosphere exchange of greenhouse gases (GHG). There is a lack of data from Central Africa. We quantified fluxes of CO$_{2}$, CH$_{4}$, and N$_{2}$O at the soil-atmosphere interface in a secondary forest, a cocoa agroforest, and an unfertilized cropland. Soil respiration was highest in the secondary forest (15.37 ± 3.42 Mg C ha$^{-1}$ y$^{-1}$), intermediate in the cacao agroforest (12.26 ± 2.91 Mg C ha$^{-1}$ y$^{-1}$) and the lowest in the unfertilized cropland (8.74 ± 2.62 Mg C ha$^{-1}$ y$^{-1}$). Likewise, N$_{2}$O fluxes were highest in the secondary forest (2.17 ± 0.20 kg N ha$^{-1}$ y$^{-1}$), intermediate in the cacao agroforest (1.40 ± 0.08 kg N ha$^{-1}$ y$^{-1}$) and lowest in the unfertilized cropland (1.04 ± 0.15 kg N ha$^{-1}$ y$^{-1}$). Soils were a sink for atmospheric CH$_{4}$ and sink strength was high in the secondary forest (−3.60 ± 1.83 kg CH$_{4}$ ha$^{-1}$ y$^{-1}$) and cacao agroforest (−3.61 ± 2.09 kg CH$_{4}$ ha$^{-1}$ y$^{-1}$) and low in the unfertilized cropland (−1.9 ± 1.59 kg CH$_{4}$ ha$^{-1}$ y$^{-1}$). ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000122980
Veröffentlicht am 11.09.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1569-3430, 1744-4225, 1943-815X, 1943-8168
KITopen-ID: 1000122980
HGF-Programm 12.02.01 (POF III, LK 01) Effects of land use and climate change
Erschienen in Journal of integrative environmental sciences
Verlag Taylor & Francis Open Access
Band 17
Heft 3
Seiten 45-67
Vorab online veröffentlicht am 20.07.2020
Schlagwörter Congo Basin, forest landscape, greenhouse gases, soil respiration
Nachgewiesen in Dimensions
Web of Science
Scopus
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