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Title: Stronger warming effects on microbial abundances in colder regions

Soil microbes play critical roles in regulating terrestrial carbon (C) cycle and its feedback to climate change. However, it is still unclear how the soil microbial community and abundance respond to future climate change scenarios. In this meta-analysis, we synthesized the responses of microbial community and abundance to experimental warming from 64 published field studies. Our results showed that warming significantly increased soil microbial abundance by 7.6% on average. When grouped by vegetation or soil types, tundras and histosols had the strongest microbial responses to warming with increased microbial, fungal, and bacterial abundances by 15.0%, 9.5% and 37.0% in tundra, and 16.5%, 13.2% and 13.3% in histosols, respectively. We found significant negative relationships of the response ratios of microbial, fungal and bacterial abundances with the mean annual temperature, indicating that warming had stronger effects in colder than warmer regions. Moreover, the response ratios of microbial abundance to warming were positively correlated with those of soil respiration. Our results therefore indicate that the large quantities of C stored in colder regions are likely to be more vulnerable to climate warming than the soil C stored in other warmer regions.
 [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [2] ;  [2] ;  [2] ;  [4]
  1. Chinese Academy of Sciences, Xi'an (China); Univ. of Chinese Academy of Science, Beijing (China)
  2. Univ. of Oklahoma, Norman, OK (United States)
  3. Fudan Univ., Coastal Ecosystems Research Station of Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, The Institute of Biodiversity Science, Shanghai (China)
  4. Chinese Academy of Sciences, Xi'an (China); Xi'an Jiaotong Univ., Xi'an (China)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
climate-change ecology; microbial ecology