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 (Q₁₀) of individual taxa may explain differences in the Q₁₀ of soil respiration, a possibility not previously examined due to methodological limitations. Here, we show phylogenetic and taxonomic variation in the Q₁₀ 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 Q₁₀, which was strongly predictive of soil respiration Q₁₀ 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，其活动随温度升高的变化可能会反馈给气候变化。微生物生物多样性的变化和个体分类群的温度敏感性 ( Q ₁₀ ) 可以解释土壤呼吸Q ₁₀的差异，由于方法学的限制，这种可能性以前没有研究过。在这里，我们展示了来自四个地点的土壤细菌的Q ₁₀生长 (5–35 °C) 的系统发育和分类变异，其中一个来自北极、北方、温带和热带生物群落。类群的温度敏感性和群落的分类组成的差异决定了群落组装的细菌生长Q ₁₀，这强烈预测了生物群落内和跨生物群落的土壤呼吸Q _{10 。}我们的研究结果表明，微生物类群的群落组装特征可以增强对全球生态系统中碳循环对气候变化的反馈的预测。