McReynolds Ella, Elshahed Mostafa S, Youssef Noha H
Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, USA.
Microb Genom. 2025 Jan;11(1). doi: 10.1099/mgen.0.001344.
Members of the phylum inhabit a wide range of ecosystems including soils. We analysed the global patterns of distribution and habitat preferences of various lineages across major ecosystems (soil, engineered, host-associated, marine, non-marine saline and alkaline and terrestrial non-soil ecosystems) in 248 559 publicly available metagenomic datasets. Classes , , and were highly ubiquitous and showed a clear preference to soil over non-soil habitats, while classes and showed preferences to non-soil habitats. However, while specific preferences were observed, most lineages were habitat generalists rather than specialists, with genomic and/or metagenomic fragments recovered from soil and non-soil habitats at various levels of taxonomic resolution. Comparative analysis of 1930 genomes strongly indicates that phylogenetic affiliation plays a more important role than the habitat from which the genome was recovered in shaping the genomic characteristics and metabolic capacities of the . The observed lack of strong habitat specialization and habitat-transition-driven lineage evolution in the suggest ready cross-colonization between soil and non-soil habitats. We posit that such capacity is key to the successful establishment of as a major component in soil microbiomes post-ecosystem disturbance events or during pedogenesis.
该门的成员栖息于包括土壤在内的广泛生态系统中。我们在248559个公开可用的宏基因组数据集中，分析了各个谱系在主要生态系统（土壤、工程、宿主相关、海洋、非海洋盐碱地和陆地非土壤生态系统）中的全球分布模式和栖息地偏好。纲、、和高度普遍存在，且相较于非土壤栖息地，对土壤表现出明显的偏好，而纲和则偏好非土壤栖息地。然而，尽管观察到了特定偏好，但大多数谱系是栖息地通才而非专才，在不同分类分辨率水平上，从土壤和非土壤栖息地都能回收基因组和/或宏基因组片段。对1930个基因组的比较分析有力地表明，在塑造该门的基因组特征和代谢能力方面，系统发育归属比回收基因组的栖息地发挥着更重要的作用。在该门中观察到的缺乏强烈的栖息地特化以及栖息地转变驱动的谱系进化，表明土壤和非土壤栖息地之间易于交叉定殖。我们认为，这种能力是该门在生态系统干扰事件后或土壤发生过程中成功成为土壤微生物群主要组成部分的关键。
