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- W4220786790 abstract "<p>Land use change specially affects greenhouse gases (GHGs) emissions, and it can act as a sink/source of GHGs. Alterations in edaphic properties and microbial attributes induced by land use change can individually/interactively contribute to GHGs emission, but how they predictably affect soil CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>O emissions remain unclear. Here, we investigated the direct and indirect controls of edaphic properties [i.e. dissolved organic C (DOC), soil organic C (SOC), total N (TN), C: N ratio, NH<sub>4</sub><sup>+</sup>-N, NO<sub>3</sub><sup>&#65293;</sup>-N, soil temperature (ST), soil moisture (SM), pH, bulk density (BD)] and microbial attributes [i.e. total PLFAs (Phospholipid fatty acids), 18:1&#969;7c, nitrifying genes (ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB)), and denitrifying genes (<em>nirS</em>, <em>nirK</em>, and <em>nosZ</em>)] over the annual soil CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>O emissions from the woodland, shrubland, and abandoned land in subtropical China. Soil CO<sub>2</sub> and N<sub>2</sub>O emissions were higher in the afforested lands (woodland and shrubland) than in the abandoned land, but the annual cumulative CH<sub>4</sub> uptake did not significantly differ among all land use types. The CO<sub>2</sub> emission was positively associated with microbial activities (e.g., total PLFAs), while the CH<sub>4</sub> uptake was tightly correlated with soil environments (i.e. ST, SM) and chemical properties (i.e. DOC, C:N ratio, NH<sub>4</sub><sup>+</sup>-N concentration), but not significantly related to the methanotrophic bacteria (i.e. 18:1&#969;7c). Whereas, soil N<sub>2</sub>O emission was positively associated with nitrifying genes, but negatively correlated with denitrifying genes especially <em>nosZ</em>. Overall, our results suggested that soil CO<sub>2</sub> and N<sub>2</sub>O emissions were directly dependent on microbial attributes, and soil CH<sub>4</sub> uptake was more directly related to edaphic properties rather than microbial attributes. Thus, different patterns of soil CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>O emissions and associated controls following land use change provided novel insights into predicting the effects of afforestation on climate change mitigation outcomes.</p>" @default.
- W4220786790 created "2022-04-03" @default.
- W4220786790 creator A5001459141 @default.
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- W4220786790 date "2022-03-27" @default.
- W4220786790 modified "2023-09-29" @default.
- W4220786790 title "Differential response of soil CO2, CH4, and N2O emissions to edaphic properties and microbial attributes following afforestation in central China" @default.
- W4220786790 doi "https://doi.org/10.5194/egusphere-egu22-3098" @default.
- W4220786790 hasPublicationYear "2022" @default.
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