Contribution of soil bacteria to the atmosphere across biomes
Contribution of soil bacteria to the atmosphere across biomes
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DOI：
10.1016/j.scitotenv.2023.162137
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发表时间：
2023-02-13
影响因子：
9.8
通讯作者：
Pointing, Stephen B.
中科院分区：
文献类型：
--
作者：
Archer, Stephen D. J.;Lee, Kevin C.;Pointing, Stephen B.
微生物在大气中的扩散是一个持续的基本过程，是地理学和生态系统发展和功能的基础。尽管大气微生物在全球范围内无处不在，但在任何特定位置大气微生物多样性的决定因素的具体知识仍然没有得到解决。在这里，我们描述了细菌多样性的大气边界层和底层土壤在全球分布的12个地点，包括所有主要的生物群落，并分析了本地和远程土壤的贡献，所观察到的大气群落。在生物群落中，大气中细菌的多样性与年平均降水量呈负相关，但与年平均温度呈正相关。我们确定了不同的非随机组装的大气和土壤群落，从每个位置，和一些广泛的趋势持续整个生物群落，包括丰富的干燥和紫外线耐受类群在大气中的社区。源跟踪显示，当地土壤更有影响力，比遥远的土壤来源，在确定观测到的大气中的多样性，更多的排放半干旱和干旱生物群落贡献最大的签名从遥远的土壤。我们的研究结果强调了大气微生物群的复杂性，这些微生物群与理解区域和全球生态系统的连通性有关。
The dispersion of microorganisms through the atmosphere is a continual and essential process that underpins biogeography and ecosystem development and function. Despite the ubiquity of atmospheric microorganisms globally, specific knowledge of the determinants of atmospheric microbial diversity at any given location remains unresolved. Here we describe bacterial diversity in the atmospheric boundary layer and underlying soil at twelve globally distributed locations encompassing all major biomes, and characterise the contribution of local and distant soils to the observed atmospheric community. Across biomes the diversity of bacteria in the atmosphere was negatively correlated with mean annual precipitation but positively correlated to mean annual temperature. We identified distinct non-randomly assembled atmosphere and soil communities from each location, and some broad trends persisted across biomes including the enrichment of desiccation and UV tolerant taxa in the atmospheric community. Source tracking revealed that local soils were more influential than distant soil sources in determining observed diversity in the atmosphere, with more emissive semi-arid and arid biomes contributing most to signatures from distant soil. Our findings highlight complexities in the atmospheric microbiota that are relevant to understanding regional and global ecosystem connectivity.