Members of the bacterial candidate phylum WPS‐2 (or Eremiobacterota) are abundant in several dry, bare soil environments. In a bare soil deposited by an extinct iron–sulfur spring, we found that WPS‐2 comprised up to 24% of the bacterial community and up to 10⁸ cells per g of soil based on 16S rRNA gene sequencing and quantification. A single genus‐level cluster (Ca. Rubrimentiphilum) predominated in bare soils but was less abundant in adjacent forest. Nearly complete genomes of Ca. Rubrimentiphilum were recovered as single amplified genomes (SAGs) and metagenome‐assembled genomes (MAGs). Surprisingly, given the abundance of WPS‐2 in bare soils, the genomes did not indicate any capacity for autotrophy, phototrophy, or trace gas metabolism. Instead, they suggest a predominantly aerobic organoheterotrophic lifestyle, perhaps based on scavenging amino acids, nucleotides, and complex oligopeptides, along with lithotrophic capacity on thiosulfate. Network analyses of the entire community showed that some species of Chloroflexi, Actinobacteria, and candidate phylum AD3 (or Dormibacterota) co‐occurred with Ca. Rubrimentiphilum and may represent ecological or metabolic partners. We propose that Ca. Rubrimentiphilum act as efficient heterotrophic scavengers. Combined with previous studies, these data suggest that the phylum WPS‐2 includes bacteria with diverse metabolic capabilities.

中文翻译：

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在无植被的土壤中候选门类WPS-2细菌的生态和基因组分析。

WPS-2细菌候选门（或Eremiobacterota）的成员在几种干燥，裸露的土壤环境中都很丰富。在由灭绝的铁硫弹簧沉积的裸露土壤中，基于16S rRNA基因测序和定量分析，我们发现WPS-2占细菌群落的24％和每克土壤多达10 ^8个细胞。一个单一的属水平簇（Ca. Rubrimentiphilum）在裸露的土壤中占主导地位，但在邻近的森林中则较少。Ca的近乎完整的基因组。恢复了风疹病毒，成为单扩增基因组（SAG）和超基因组组装基因组（MAG）。出乎意料的是，鉴于在裸露的土壤中有大量的WPS-2，因此基因组没有显示自养，光养或微量气体代谢的能力。相反，他们提出了一种主要有氧的有机异养生活方式，也许是基于清除氨基酸，核苷酸和复杂的寡肽，以及硫代硫酸盐的石养能力。结果显示，一些物种的整个社会网络分析绿弯菌门，放线菌，和候选门AD3（或Dormibacterota）共发生与Ca的 风疹，可能代表生态或代谢伙伴。我们建议钙。鼠李糖单胞菌充当有效的异养清除剂。结合先前的研究，这些数据表明，WPS-2门系包含具有多种代谢能力的细菌。