Deng, YeHe, ZhiliXiong, JinboYu, HaoXu, MeiyingHobbie, Sarah EReich, Peter BSchadt, Christopher WKent, AngelaPendall, EliseWallenstein, MatthewZhou, Jizhong2017-02-222017-02-222016Deng, Y., He, Z., Xiong, J.et al. (2016). Elevated carbon dioxide accelerates the spatial turnover of soil microbial communities. Global Change Biology, 22(2), 957-964.https://hdl.handle.net/11299/184459Although 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.enelevated carbon dioxidefree air CO2 enrichmentmicrobial communityspatial turnover rateβ-diversityArticle10.1111/gcb.13098