中文摘要：

甲烷（CH4）对全球变暖的贡献仅次于二氧化碳（CO2）,百年尺度上单分子CH4的增温潜势是CO2的28~34倍。湖泊被认为是重要的CH4释放源。沉积物中CH4的产生和氧化影响湖泊CH4的释放,是湖泊碳循环的重要组成部分。本文介绍了湖泊沉积物CH4产生和氧化的过程,分析了影响因素和机制;总结了湖泊富营养化和全球变暖对CH4产生和氧化的影响。最后提出,未来在研究方法上应注重室内模拟和野外观测相结合,在区域尺度上加强湖泊沉积物CH4产生和氧化的驱动机制研究。

英文摘要：

Methane is the second important greenhouse gas after carbon dioxide,and methane is about 28-34 folds more effective than CO2 in trapping heat in the atmosphere on the molecule basis at the centennial-scale.Lakes are recognized as an important source of methane.The emission of methane from lakes is affected by its production and oxidation in lake sediments,which is an important component of the lake carbon cycle.In the paper,the procedures of methane production and oxidation in lake sediments were introduced,influencing factors and mechanisms were discussed,and the impacts of lake eutrophication and global warming to methane production and oxidation were summarized.Finally,we advised that the future work should emphasize on the combination of laboratory simulation and field observation,and study driving forces for methane production and oxidation from lake sediments at regional scale.