Soil microbes are key to myriad processes in terrestrial ecosystems. Elevated CO₂ represents a dominant driver of global climate change; however, it remains unclear to what extent elevated CO₂ impacts soil microbial communities at ecosystem and global scales. Here, we sought to address the following questions: (a) Do the compositions of microbial communities shift from K‐ to r‐strategists under elevated CO₂? (b) What is the extent of the compositional shifts of microbial communities affected by elevated CO₂ concentrations, experimental duration, ecosystem types and/or background climates? (c) Are the responses of microbial communities to elevated CO₂ associated with changes in soil pH and carbon and nitrogen availabilities?

中文翻译：

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CO2浓度升高使土壤微生物群落从K-转变为R-战略家

土壤微生物是陆地生态系统无数过程的关键。升高的CO ₂代表了全球气候变化的主要驱动力；然而，目前尚不清楚升高的CO ₂在生态系统和全球范围内在多大程度上影响土壤微生物群落。在这里，我们试图解决以下问题：（a）在CO ₂升高的情况下，微生物群落的组成是否从K策略向r策略家转变？（b）受升高的CO ₂浓度，实验持续时间，生态系统类型和/或背景气候影响的微生物群落组成变化的程度是什么？（c）微生物群落对CO ₂升高的反应 与土壤pH值和碳氮利用率的变化有关？