期刊
GLOBAL CHANGE BIOLOGY
卷 22, 期 2, 页码 957-964出版社
WILEY
DOI: 10.1111/gcb.13098
关键词
elevated carbon dioxide; free air CO2 enrichment; microbial community; spatial turnover rate; -diversity
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB15010302]
- '100 Talents' program of Chinese Academy of Sciences
- US Department of Agriculture through the NSF-USDA Microbial Observatories Program [2007-35319-18305]
- US Department of Energy, Biological Systems Research on the Role of Microbial Communities in Carbon Cycling Program [DE-SC0004601]
- National Science Foundation [DEB-0716587, DEB-0620652, DEB-0322057, DEB-0080382, DEB-0218039, DEB-0219104, DEB-0217631, DEB 1021559]
- DOE Program for Ecosystem Research
- Minnesota Environment and Natural Resources Trust Fund
- USDA Agricultural Research Service and CSREES [2008-35107-18655]
- US Department of Energy's Office of Science (BER)
- Direct For Biological Sciences
- Division Of Environmental Biology [1234162, 1020540, 1120064] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1242531] Funding Source: National Science Foundation
Although elevated CO2 (eCO(2)) significantly affects the -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 -diversity of 110 soil microbial communities across six free air CO2 enrichment (FACE) experimental sites using a high-throughput functional gene array. The -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 eCO(2) with a slope of -0.0250 than at ambient CO2 (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 -diversity. This study provides new hypotheses for further understanding their assembly mechanisms that may be especially important as global CO2 continues to increase.
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