Biogeographic Patterns and Elevational Differentiation of Sedimentary Bacterial Communities across River Systems in China

作者：Sibo Zhang, Xinghui Xia, Junfeng Wang, Xiaokang Li, Yuan Xin, Jiaao Bao, Lanfang Han, Wei Qin, Zhifeng Yang · 发表于：Applied and Environmental Microbiology · 年份：2022 · DOI：10.1128/aem.00597-22 · 被引用次数：13 · 研究领域：Microbial Community Ecology and Physiology、Environmental DNA in Biodiversity Studies、Gut microbiota and health

Bacterial diversity is tightly correlated with the nutrient cycling of river systems. However, previous studies on bacterial diversity are mainly constrained to one single river system, although microbial biogeography and its drivers exhibit strong spatial scale dependence. Moreover, elevational differentiations of bacterial communities across river systems have also rarely been studied. Bacterial rare and abundant subcommunities make distinct contributions to ecosystem functioning, and they share similar biogeographic patterns in some environments but not in others. Therefore, we explored the biogeography of the entire, abundant, and rare (sub)communities in nine rivers that cover a wide space range and large elevational gradient in China. Our results revealed that bacterial rare and abundant subcommunities shared similar biogeographic patterns but their assembly mechanisms were much different in these rivers. Moreover, bacterial communities showed evident differentiations between high elevations and low elevations. These findings will facilitate a better understanding of bacterial diversity features in river systems.