Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, USA.
CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning, China.
ISME J. 2021 Sep;15(9):2738-2747. doi: 10.1038/s41396-021-00959-1. Epub 2021 Mar 29.
Microorganisms drive soil carbon mineralization and changes in their activity with increased temperature could feedback to climate change. Variation in microbial biodiversity and the temperature sensitivities (Q) of individual taxa may explain differences in the Q of soil respiration, a possibility not previously examined due to methodological limitations. Here, we show phylogenetic and taxonomic variation in the Q of growth (5-35 °C) among soil bacteria from four sites, one from each of Arctic, boreal, temperate, and tropical biomes. Differences in the temperature sensitivities of taxa and the taxonomic composition of communities determined community-assembled bacterial growth Q, which was strongly predictive of soil respiration Q within and across biomes. Our results suggest community-assembled traits of microbial taxa may enable enhanced prediction of carbon cycling feedbacks to climate change in ecosystems across the globe.
微生物驱动土壤碳矿化，其活性随温度升高而变化，可能会对气候变化产生反馈。微生物生物多样性的变化和单个分类群的温度敏感性 (Q) 可能解释了土壤呼吸 Q 的差异，由于方法学的限制，以前没有对此进行过检查。在这里，我们展示了来自四个地点（一个来自北极、一个来自北方森林、一个来自温带、一个来自热带生物群落）的土壤细菌在生长（5-35°C）时的 Q 的系统发育和分类变化。分类群的温度敏感性差异和群落的分类组成决定了群落组装的细菌生长 Q，这与生物群落内和跨生物群落的土壤呼吸 Q 具有很强的预测性。我们的结果表明，微生物分类群的群落组装特征可能使我们能够更好地预测全球生态系统中碳循环对气候变化的反馈。
