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- W3044804937 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 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." @default.
- W3044804937 created "2020-07-29" @default.
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- W3044804937 date "2020-07-20" @default.
- W3044804937 modified "2023-10-14" @default.
- W3044804937 title "Land-use change and Biogeochemical controls of soil <scp>CO<sub>2</sub>, N<sub>2</sub>O</scp> and <scp>CH<sub>4</sub></scp> fluxes in Cameroonian forest landscapes" @default.
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- W3044804937 doi "https://doi.org/10.1080/1943815x.2020.1779092" @default.
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