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

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dc.creatorVerchot, Louis V.
dc.creatorDannenmann, Michael
dc.creatorKengdo, S.K.
dc.creatorNjine-Bememba, C.B.
dc.creatorRufino, Mariana C.
dc.creatorSonwa, D.J.
dc.creatorTejedor, J.
dc.date2020-12-29
dc.date2021-03-08T08:33:55Z
dc.date2021-03-08T08:33:55Z
dc.date.accessioned2026-06-27T13:38:32Z
dc.descriptionDeforestation 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 CO2, CH4, and N2O 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, N2O 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 CH4 and sink strength was high in the secondary forest (−3.60 ± 1.83 kg CH4 ha−1 y−1) and cacao agroforest (−3.61 ± 2.09 kg CH4 ha−1 y−1) and low in the unfertilized cropland (−1.9 ± 1.59 kg CH4 ha−1 y−1). Variation in soil water content rather than temperature was the dominant driver of seasonal variations of the fluxes at all study sites and N availability affected both N2O and CH4 fluxes. Our results suggest that tropical land-use change is decreasing soil respiration, decreasing the strength of the soil CH4 sink and decreasing N2O emissions, in landscapes that do not practice agriculture with chemical fertilization.
dc.identifierhttps://hdl.handle.net/10568/112480
dc.identifier.urihttp://hdl.handle.net/123456789/65782
dc.languageen
dc.publisherInforma UK Limited
dc.rightsOpen Access
dc.sourceVerchot, L.V., Dannenmann, M., Kengdo, S.K., Njine-Bememba, C.B., Rufino, M.C., Sonwa, D.J. and Tejedor, J., 2020. Land-use change and Biogeochemical controls of soil CO2, N2O and CH4 fluxes in Cameroonian forest landscapes. Journal of Integrative Environmental Sciences. https://doi.org/10.1080/1943815X.2020.1779092
dc.subjectland use change
dc.subjectgreenhouse gas emissions
dc.subjectsoil respiration
dc.titleLand-use change and Biogeochemical controls of soil CO2, N2O and CH4 fluxes in Cameroonian forest landscapes
dc.typeJournal Article

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