Life history strategies of soil bacterial communities across global terrestrial biomes
Life history strategies of soil bacterial communities across global terrestrial biomes
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DOI：
10.1038/s41564-023-01465-0
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发表时间：
2023-10
影响因子：
28.3
通讯作者：
G. Piton;S. Allison;Mohammad Bahram;Falk Hildebrand;J. Martiny;K. Treseder;A. Martiny
中科院分区：
文献类型：
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作者：
G. Piton;S. Allison;Mohammad Bahram;Falk Hildebrand;J. Martiny;K. Treseder;A. Martiny
土壤微生物的生活史策略决定了它们的代谢潜能和对环境变化的响应。然而，人们对这些策略仍然知之甚少。在这里，我们使用来自陆地生物群落的散弹枪宏基因组来表征捕获细菌群落中主要生活史策略的基因组特征的总体协变。新出现的模式显示了由两个特征维度形成的生活史策略的三角形，支持了先前的理论和基于孤立的研究。第一个维度范围从具有简单代谢的流线型基因组到更大的基因组和扩展的代谢能力。随着代谢能力的扩大，细菌群落在第二维度上日益分化，这反映了环境响应能力和营养物质循环能力之间的权衡。随机森林分析表明，土壤pH、碳氮比和降水模式共同决定了土壤细菌群落的优势生活史策略及其生物地理分布。我们的发现提供了一个基于性状的框架来比较土壤细菌的生活史策略。
The life history strategies of soil microbes determine their metabolic potential and their response to environmental changes. Yet these strategies remain poorly understood. Here we use shotgun metagenomes from terrestrial biomes to characterize overarching covariations of the genomic traits that capture dominant life history strategies in bacterial communities. The emerging patterns show a triangle of life history strategies shaped by two trait dimensions, supporting previous theoretical and isolate-based studies. The first dimension ranges from streamlined genomes with simple metabolisms to larger genomes and expanded metabolic capacities. As metabolic capacities expand, bacterial communities increasingly differentiate along a second dimension that reflects a trade-off between increasing capacities for environmental responsiveness or for nutrient recycling. Random forest analyses show that soil pH, C:N ratio and precipitation patterns together drive the dominant life history strategy of soil bacterial communities and their biogeographic distribution. Our findings provide a trait-based framework to compare life history strategies of soil bacteria.