Methane Production Is More Sensitive to Temperature Increase than Aerobic and Anaerobic Methane Oxidation in Chinese Paddy Soils

作者：Wangting Yang, Evgenios Agathokleous, Jianghua Wu, Hongyang Chen, Rongjun Wu, Hechen Huang, Bingjie Ren, Si-le Wen, Lidong Shen, Weiqi Wang · 发表于：Environmental Science & Technology · 年份：2024 · DOI：10.1021/acs.est.4c04494 · 被引用次数：14 · 研究领域：Atmospheric and Environmental Gas Dynamics、Methane Hydrates and Related Phenomena、Hydrocarbon exploration and reservoir analysis

Methane emissions from paddy fields can increase under future warming scenarios. Nevertheless, a comprehensive comparison of the temperature sensitivity of methane-related microbial processes remains elusive. Here, we revealed that the temperature sensitivity of methane production (activation energy ( E a ) = 0.94 eV; 95% confidence interval (CI), 0.78–1.10 eV) and aerobic ( E a = 0.49 eV; 95% CI, 0.34–0.65 eV) and anaerobic ( E a = 0.46 eV; 95% CI, 0.30–0.62 eV) methane oxidation exhibited notable spatial heterogeneity across 12 Chinese paddy fields spanning 35° longitude and 18° latitude. In addition, the E a values of aerobic and anaerobic methane oxidation were significantly positively and negatively correlated to the latitude, respectively, while there was no significant correlation between the E a of methane production and the latitude. Overall, there were no soil factors that had a significant effect on the E a of methane production. The E a of aerobic methane oxidation was primarily influenced by the contents of ammonium and clay, whereas the E a of anaerobic methane oxidation was mainly influenced by the conductivity. Despite the variation, the overall temperature sensitivity of methane production was significantly higher than that of oxidation at a continental scale; therefore, an increase in the emission of methane from paddy fields will be predicted under future warming. Taken together, our study revealed the characteristics of temperature sensitivity of methane p...