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

Abstract

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.more » 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.« less

Authors:

Liang, Yuting  ^[1];

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Xiao, Xian ^[1]; Nuccio, Erin E. ^[2]; Yuan, Mengting ^[3]; Zhang, Na ^[4]; Xue, Kai ^[5]; Cohan, Frederick M. ^[6]; Zhou, Jizhong ^[7]; Sun, Bo ^[1]

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+ Show Author Affiliations

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)

Publication Date:

Mon Feb 17 00:00:00 EST 2020

Research Org.:

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; Chinese Academy of Sciences

OSTI Identifier:

1810672

Report Number(s):

LLNL-JRNL-789698
Journal ID: ISSN 1462-2912; 988139

Grant/Contract Number:  

AC52-07NA27344; 41530856; 4162210; 2016YFD0200309; XDA24020104

Resource Type:

Accepted Manuscript

Journal Name:

Environmental Microbiology

Additional Journal Information:

Journal Volume: 22; Journal Issue: 4; Journal ID: ISSN 1462-2912

Publisher:

Wiley

Country of Publication:

United States

Language:

English

Subject:

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