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Differentiation strategies of soil rare and abundant microbial taxa in response to changing climatic regimes

Journal Article · · Environmental Microbiology
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [1]
  1. Chinese Academy of Sciences (CAS), Nanjing (China). State Key Lab. of Soil and Sustainable Agriculture
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Chinese Academy of Sciences (CAS), Nanjing (China). State Key Lab. of Soil and Sustainable Agriculture; Univ. of the Chinese Academy of Sciences, Beijing (China)
  5. Univ. of the Chinese Academy of Sciences, Beijing (China); Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics
  6. Wesleyan Univ., Middletown, CT (United States)
  7. Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
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Despite the important roles of soil microbes, especially the most diverse rare taxa in maintaining community diversity and multifunctionality, how different climate regimes alter the stability and functions of the rare microbial biosphere remains unknown. We reciprocally transplanted field soils across a latitudinal gradient to simulate climate change and sampled the soils annually after harvesting the maize over the following 6 years (from 2005 to 2011). By sequencing microbial 16S ribosomal RNA gene amplicons, we found that changing climate regimes significantly altered the composition and dynamics of soil microbial communities. A continuous succession of the rare and abundant communities was observed. Rare microbial communities were more stable under changing climatic regimes, with lower variations in temporal dynamics, and higher stability and constancy of diversity. More nitrogen cycling genes were detected in the rare members than in the abundant members, including amoA, napA, nifH, nirK, nirS, norB and nrfA. Random forest analysis and receiver operating characteristics analysis showed that rare taxa may act as potential contributors to maize yield under changing climatics. The study indicates that the taxonomically and functionally diverse rare biosphere has the potential to increase functional redundancy and enhance the ability of soil communities to counteract environmental disturbances. With ongoing global climate change, exploring the succession process and functional changes of rare taxa may be important in elucidating the ecosystem stability and multifunctionality that are mediated by microbial communities.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); National Key R&D Program of China; Chinese Academy of Sciences
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1810672
Report Number(s):
LLNL-JRNL--789698; 988139
Journal Information:
Environmental Microbiology, Journal Name: Environmental Microbiology Journal Issue: 4 Vol. 22; ISSN 1462-2912
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

59 BASIC BIOLOGICAL SCIENCES
climate change
nitrogen cycling genes
rare taxa
soil bacteria
stability