Local community assembly mechanisms shape soil bacterial β diversity patterns along a latitudinal gradient

Xiao Zhang, Shirong Liu (), Jingxin Wang, Yongtao Huang, Zachary Freedman, Shenglei Fu, Kuan Liu, Hui Wang, Xiangzhen Li, Minjie Yao, Xiaojing Liu and Jamie Schuler
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Xiao Zhang: Chinese Academy of Forestry
Shirong Liu: Chinese Academy of Forestry
Jingxin Wang: West Virginia University
Yongtao Huang: Henan University
Zachary Freedman: West Virginia University
Shenglei Fu: Henan University
Kuan Liu: University of Toronto
Hui Wang: Chinese Academy of Forestry
Xiangzhen Li: Fujian Agriculture and Forestry University
Minjie Yao: Fujian Agriculture and Forestry University
Xiaojing Liu: Baotianman Natural Reserve Administration
Jamie Schuler: West Virginia University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Biodiversity patterns across geographical gradients could result from regional species pool and local community assembly mechanisms. However, little has been done to separate the effects of local ecological mechanisms from variation in the regional species pools on bacterial diversity patterns. In this study, we compare assembly mechanisms of soil bacterial communities in 660 plots from 11 regions along a latitudinal gradient in eastern China with highly divergent species pools. Our results show that β diversity does not co-vary with γ diversity, and local community assembly mechanisms appear to explain variation in β diversity patterns after correcting for variation in regional species pools. The variation in environmental conditions along the latitudinal gradient accounts for the variation in β diversity through mediating the strength of heterogeneous selection. In conclusion, our study clearly illustrates the importance of local community assembly processes in shaping geographical patterns of soil bacterial β diversity.

Date: 2020
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DOI: 10.1038/s41467-020-19228-4

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