Microbial diversity drives carbon use efficiency in a model soil
Microbial diversity drives carbon use efficiency in a model soil
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DOI：
10.1038/s41467-020-17502-z
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发表时间：
2020-07-23
影响因子：
16.6
通讯作者：
DeAngelis, Kristen M.
中科院分区：
文献类型：
--
作者：
Domeignoz-Horta, Luiz A.;Pold, Grace;DeAngelis, Kristen M.
土壤碳循环对变暖、干旱和多样性丧失的综合影响的反应的经验证据很少。微生物碳利用效率（CUE）在调节土壤碳流动中起着核心作用，但生物和非生物因素如何相互作用以驱动它仍不清楚。在这里，我们结合联合收割机不同的社区接种物（生物因素）与不同的温度和水分条件（非生物因素），以操纵微生物多样性和社区结构内的模型土壤。而社区组成和多样性是最强的预测CUE，非生物因素调制多样性和CUE之间的关系，与CUE正相关，只有在高水分与细菌多样性。总之，这些结果表明，多样性x生态系统功能的关系，可以在土壤中的不利条件下受损，并了解土壤碳循环的变化，我们需要考虑到全球变化的多个方面。
Empirical evidence for the response of soil carbon cycling to the combined effects of warming, drought and diversity loss is scarce. Microbial carbon use efficiency (CUE) plays a central role in regulating the flow of carbon through soil, yet how biotic and abiotic factors interact to drive it remains unclear. Here, we combine distinct community inocula (a biotic factor) with different temperature and moisture conditions (abiotic factors) to manipulate microbial diversity and community structure within a model soil. While community composition and diversity are the strongest predictors of CUE, abiotic factors modulated the relationship between diversity and CUE, with CUE being positively correlated with bacterial diversity only under high moisture. Altogether these results indicate that the diversity x ecosystem-function relationship can be impaired under non-favorable conditions in soils, and that to understand changes in soil C cycling we need to account for the multiple facets of global changes.