Effects of warming on the bacterial community and its function in a temperate steppe.
Effects of warming on the bacterial community and its function in a temperate steppe.
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DOI：
10.1016/j.scitotenv.2021.148409
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发表时间：
2021-06
期刊：
影响因子：
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通讯作者：
Yang Yu;Lu Liu;Jing Wang;Yushu Zhang;Chunwang Xiao
中科院分区：
文献类型：
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作者：
Yang Yu;Lu Liu;Jing Wang;Yushu Zhang;Chunwang Xiao
全球气候变暖作为一个重大的环境问题，将对土壤微生物尤其是土壤细菌产生重大影响。然而，变暖对细菌群落网络结构和生态系统功能的影响仍不清楚。因此，我们研究了三年模拟田间升温对内蒙古温带草原土壤细菌群落复杂性的影响，并预测了其功能。气候变暖在2018年显著增加了细菌的α多样性，但在2019年和2020年没有影响。气候变暖增加了网络的复杂性和稳定性，增加了关键类群，并且这些类群之间的联系也更加紧密，这表明保护细菌类群之间的相互作用对生物多样性的保护非常重要。变暖显著增加了好氧化学异养、尿素分解和化学异养，表明变暖增加了细菌分解有机物的能力和温室气体（如CO2和CH4）的排放。总体而言，变暖将改变土壤细菌群落结构及其潜在功能，进一步影响草地地下生态系统的关键功能。
As a significant environmental issue, global warming will have a significant impact on soil microorganisms, especially soil bacteria. However, the effects of warming on the network structure of bacterial communities and the function of ecosystems remain unclear. Therefore, we examined the effects of three-year simulated field warming on the complexity of soil bacterial communities and predicted functions in a temperate steppe of Inner Mongolia. Warming significantly increased the α-diversity of bacteria in 2018 but did not affect it in 2019 and 2020. Warming increased network complexity and stability and keystone taxa, and these bacterial taxa also associated more closely with each other, indicating that the protection of interactions between bacterial taxa is very important for the conservation of biodiversity. Warming significantly increased aerobic chemoheterotrophy, ureolysis, and chemoheterotrophy, suggesting that warming increased the ability of bacteria to decompose organic matter and the emission of greenhouse gases, such as CO2and CH4. Collectively, warming will alter soil bacterial community structure and its potential functions, further affecting key functions in grassland belowground ecosystems.