title: Elevated carbon dioxide accelerates the spatial turnover of soil microbial communities.
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.
authors.affiliation: CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, 100085, China.|Department of Microbiology and Plant Biology, Institute for Environmental Genomics, the University of Oklahoma, Norman, OK, USA.
authors.forename: Ye
authors.initials: Y
authors.lastname: Deng
authors.affiliation: Department of Microbiology and Plant Biology, Institute for Environmental Genomics, the University of Oklahoma, Norman, OK, USA.
authors.forename: Zhili
authors.initials: Z
authors.lastname: He
authors.affiliation: Department of Microbiology and Plant Biology, Institute for Environmental Genomics, the University of Oklahoma, Norman, OK, USA.|School of Marine Sciences, Ningbo University, Ningbo, 315211, China.
authors.forename: Jinbo
authors.initials: J
authors.lastname: Xiong
authors.affiliation: CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, 100085, China.|Harbin Institute of Technology, Harbin, China.|School of Environmental Science and Engineering, Liaoning Technical University, Fuxin, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Yu
authors.affiliation: Department of Microbiology and Plant Biology, Institute for Environmental Genomics, the University of Oklahoma, Norman, OK, USA.|State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou, China.
authors.forename: Meiying
authors.initials: M
authors.lastname: Xu
authors.affiliation: The University of Minnesota, St. Paul, MN, USA.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Hobbie
authors.affiliation: The University of Minnesota, St. Paul, MN, USA.|Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2751, Australia.
authors.forename: Peter B
authors.initials: PB
authors.lastname: Reich
authors.affiliation: Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors.forename: Christopher W
authors.initials: CW
authors.lastname: Schadt
authors.affiliation: Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
authors.forename: Angela
authors.initials: A
authors.lastname: Kent
authors.affiliation: University of Wyoming, Laramie, WY, 82071, USA.
authors.forename: Elise
authors.initials: E
authors.lastname: Pendall
authors.affiliation: Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA.
authors.forename: Matthew
authors.initials: M
authors.lastname: Wallenstein
authors.affiliation: Department of Microbiology and Plant Biology, Institute for Environmental Genomics, the University of Oklahoma, Norman, OK, USA.
authors.forename: Jizhong
authors.initials: J
authors.lastname: Zhou
mesh_terms: D001419:Bacteria / Q000187:drug effects / Q000235:genetics; D002245:Carbon Dioxide / Q000494:pharmacology*; D004269:DNA, Bacterial / Q000032:analysis; D012988:Soil Microbiology
chemical_list: D004269:DNA, Bacterial; D002245:Carbon Dioxide
keywords: elevated carbon dioxide; free air CO2 enrichment; microbial community; spatial turnover rate; β-diversity