湖泊微生物反硝化过程及速率研究进展

Progress in microbially mediated denitrifying in lacustrine environments

摘要:

湖泊中微生物介导的反硝化过程对于区域乃至全球的气候环境变化有着深远的影响。因此，研究湖泊微生物反硝化过程及速率有助于我们深刻理解湖泊氮元素生物地球化学循环规律，全面认识湖泊生境对全球氮循环的贡献。本文综述了湖泊生境中反硝化过程（包括典型的反硝化过程及与其他物质循环耦合的反硝化过程，如与有机氮耦合的共反硝化作用、与碳循环耦合的硝酸盐/亚硝酸盐依赖型厌氧甲烷氧化、与铁循环耦合的硝酸盐依赖型铁氧化、与硫循环耦合的硝酸盐还原硫氧化）的速率、驱动微生物及其影响因素。最后对湖泊反硝化过程研究现状和未来发展方向提出总结与展望。

Abstract:

Microbially mediated denitrification in lacustrine ecosystems has profound impact on regional and even global environment and climate change. Thus, studying lake microbial denitrification process and rate helps us obtain comprehensive understanding of nitrogen biogeochemical cycle in lacustrine ecosystems and its role in the global nitrogen cycle. This review summarizes the denitrification processes, rates and involved microbial community compositions in lacustrine ecosystems and their influencing factors. The covered denitrification processes include typical denitrification processes and those coupled with other elemental cycles including co-denitrification coupled with organic nitrogen, nitrate/nitrite-dependent anaerobic oxidization of methane coupled with carbon cycle, anaerobic nitrate-dependent Fe(II) oxidation coupled with iron cycle, nitrate/nitrite-dependent sulfide oxidation coupled with sulfur cycle. Finally, current researches and future directions related to denitrification processes in lacustrine environments were summarized.