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Elevated carbon dioxide accelerates the spatial turnover of soil microbial communities
Author(s) -
Deng Ye,
He Zhili,
Xiong Jinbo,
Yu Hao,
Xu Meiying,
Hobbie Sarah E.,
Reich Peter B.,
Schadt Christopher W.,
Kent Angela,
Pendall Elise,
Wallenstein Matthew,
Zhou Jizhong
Publication year - 2016
Publication title -
global change biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.146
H-Index - 255
eISSN - 1365-2486
pISSN - 1354-1013
DOI - 10.1111/gcb.13098
Subject(s) - geographical distance , microbial population biology , ecology , carbon dioxide , functional diversity , biology , environmental science , bacteria , medicine , population , environmental health , genetics
Although elevated CO 2 ( eCO 2 ) significantly affects the α ‐diversity, composition, function, interaction and dynamics of soil microbial communities at the local scale, little is known about eCO 2 impacts on the geographic distribution of micro‐organisms regionally or globally. Here, we examined the β ‐diversity of 110 soil microbial communities across six free air CO 2 enrichment ( FACE ) experimental sites using a high‐throughput functional gene array. The β ‐diversity of soil microbial communities was significantly ( P < 0.05) correlated with geographic distance under both CO 2 conditions, but declined significantly ( P < 0.05) faster at eCO 2 with a slope of −0.0250 than at ambient CO 2 ( aCO 2 ) with a slope of −0.0231 although it varied within each individual site, indicating that the spatial turnover rate of soil microbial communities was accelerated under eCO 2 at a larger geographic scale (e.g. regionally). Both distance and soil properties significantly ( P < 0.05) contributed to the observed microbial β ‐diversity. This study provides new hypotheses for further understanding their assembly mechanisms that may be especially important as global CO 2 continues to increase.