A global map of soil bacteria Soil bacteria play key roles in regulating terrestrial carbon dynamics, nutrient cycles, and plant productivity. However, the natural histories and distributions of these organisms remain largely undocumented. Delgado-Baquerizo et al. provide a survey of the dominant bacterial taxa found around the world. In soil collections from six continents, they found that only 2% of bacterial taxa account for nearly half of the soil bacterial communities across the globe. These dominant taxa could be clustered into ecological groups of co-occurring bacteria that share habitat preferences. The findings will allow for a more predictive understanding of soil bacterial diversity and distribution. Science, this issue p. 320 Relatively few soil bacterial taxa dominate terrestrial ecosystems worldwide, with predictable distributions and ecology. The immense diversity of soil bacterial communities has stymied efforts to characterize individual taxa and document their global distributions. We analyzed soils from 237 locations across six continents and found that only 2% of bacterial phylotypes (~500 phylotypes) consistently accounted for almost half of the soil bacterial communities worldwide. Despite the overwhelming diversity of bacterial communities, relatively few bacterial taxa are abundant in soils globally. We clustered these dominant taxa into ecological groups to build the first global atlas of soil bacterial taxa. Our study narrows down the immense number of bacterial taxa to a “most wanted” list that will be fruitful targets for genomic and cultivation-based efforts aimed at improving our understanding of soil microbes and their contributions to ecosystem functioning.

中文翻译：

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在土壤中发现的优势细菌的全球图谱

土壤细菌的全球地图 土壤细菌在调节陆地碳动态、养分循环和植物生产力方面发挥着关键作用。然而，这些生物的自然历史和分布在很大程度上仍然没有记录。Delgado-Baquerizo 等。提供对世界各地发现的主要细菌分类群的调查。在来自六大洲的土壤收集物中，他们发现只有 2% 的细菌类群占全球土壤细菌群落的近一半。这些优势分类群可以聚集成共享栖息地偏好的共生细菌生态群。这些发现将有助于对土壤细菌的多样性和分布进行更具预测性的了解。科学，这个问题 p。320 相对较少的土壤细菌类群在全球陆地生态系统中占主导地位，具有可预测的分布和生态。土壤细菌群落的巨大多样性阻碍了表征个体分类群和记录其全球分布的努力。我们分析了来自六大洲 237 个地点的土壤，发现只有 2% 的细菌系统发育型（约 500 种系统发育型）始终占全球土壤细菌群落的近一半。尽管细菌群落具有压倒性的多样性，但全球土壤中丰富的细菌分类群相对较少。我们将这些优势类群聚集成生态群，以构建第一个全球土壤细菌类群图谱。