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Climate warming suppresses abundant soil fungal taxa and reduces soil carbon efflux in a semi-arid grassland

mLife 2023年第4期2卷 389-400页

作者： Yunpeng Qiu Kangcheng Zhang Yunfeng Zhao Yexin Zhao Bianbian Wang Yi Wang Tangqing He Xinyu Xu Tongshuo Bai Yi Zhang Shuijin Hu College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjingChina Ningxia Yunwu Mountains Grassland Natural Reserve Administration GuyuanChina State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'anChina Research Center for Advanced Science and Technology The University of TokyoTokyoJapan Department of Entomology&Plant Pathology North Carolina State UniversityRaleighNorth CarolinaUSA

soil microorganisms critically affect the ecosystem carbon(C)balance and C-climate feedback by directly controlling organic C decomposition and indirectly regulating nutrient availability for plant C ***,the effects of climate change drivers such as warming,precipitation change on soil microbial communities,and C dynamics remain poorly *** a long-term field warming and precipitation manipulation in a semi-arid grassland on the Loess Plateau and a complementary incubation experiment,here we show that warming and rainfall reduction differentially affect the abundance and composition of bacteria and fungi,and soil C *** significantly reduced the abundance of fungi but not bacteria,increasing the relative dominance of bacteria in the soil microbial *** particular,warming shifted the community composition of abundant fungi in favor of oligotrophic Capnodiales and Hypocreales over potential saprotroph ***,precipitation reduction increased soil total microbial biomass but did not significantly affect the abundance or diversity of ***,the community composition of abundant,but not rare,soil fungi was significantly correlated with soil CO_(2) *** findings suggest that alterations in the fungal community composition,in response to changes in soil C and moisture,dominate the microbial responses to climate change and thus control soil C dynamics in semi-arid grasslands.

关键词： climate warming microbial diversity precipitation reduction soil carbon dynamics

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