Elevated carbon dioxide accelerates the spatial turnover of soil microbial communities. (23rd October 2015)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Global change biology. Volume 22:Number 2(2016:Feb.)
• Page Start: 957
• Page End: 964
• Publication Date: 2015-10-23
• Subjects: elevated carbon dioxide -- free air CO2 enrichment -- microbial community -- spatial turnover rate -- β‐diversity; Climatic changes -- Environmental aspects -- Periodicals; Troposphere -- Environmental aspects -- Periodicals; Biodiversity conservation -- Periodicals; Eutrophication -- Periodicals; 551.5
• DOI: 10.1111/gcb.13098
• Languages: English
• ISSNs: 1354-1013

Abstract

Abstract: Although elevated CO2 (eCO2 ) significantly affects the α ‐diversity, composition, function, interaction and dynamics of soil microbial communities at the local scale, little is known about eCO2 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 CO2 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 CO2 conditions, but declined significantly ( P < 0.05) faster at eCO2 with a slope of −0.0250 than at ambient CO2 (aCO2 ) 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 eCO2 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 CO2 continues to increase.