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Title: Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community

Abstract

BACKGROUND:It is well-known that global warming has effects on high-latitude tundra underlain with permafrost. This leads to a severe concern that decomposition of soil organic carbon (SOC) previously stored in this region, which accounts for about 50% of the world's SOC storage, will cause positive feedback that accelerates climate warming. We have previously shown that short-term warming (1.5 years) stimulates rapid, microbe-mediated decomposition of tundra soil carbon without affecting the composition of the soil microbial community (based on the depth of 42684 sequence reads of 16S rRNA gene amplicons per 3 g of soil sample). RESULTS:We show that longer-term (5 years) experimental winter warming at the same site altered microbial communities (p < 0.040). Thaw depth correlated the strongest with community assembly and interaction networks, implying that warming-accelerated tundra thaw fundamentally restructured the microbial communities. Both carbon decomposition and methanogenesis genes increased in relative abundance under warming, and their functional structures strongly correlated (R2 > 0.725, p < 0.001) with ecosystem respiration or CH4 flux. CONCLUSIONS:Our results demonstrate that microbial responses associated with carbon cycling could lead to positive feedbacks that accelerate SOC decomposition in tundra regions, which is alarming because SOC loss is unlikely to subside owing to changesmore » in microbial community composition. Video Abstract.« less

Authors:
 [1];  [1];  [2]; ORCiD logo [2];  [3];  [4];  [1];  [1];  [1];  [1];  [1];  [5];  [3];  [1];  [1];  [6];  [7];  [8];  [9];  [10] more »;  [10];  [8];  [11] « less
  1. Univ. of Oklahoma, Norman, OK (United States)
  2. Tsinghua Univ., Beijing (China)
  3. Univ. of Oklahoma, Norman, OK (United States); Sun Yat-Sen Univ., Guangzhou (China)
  4. Univ. of Oklahoma, Norman, OK (United States); Tsinghua Univ., Beijing (China); Central South Univ., Changsha (China)
  5. Univ. of Oklahoma, Norman, OK (United States); Tsinghua Univ., Beijing (China)
  6. Univ. of Florida, Gainesville, FL (United States)
  7. Arizona State Univ., Mesa, AZ (United States)
  8. Michigan State Univ., East Lansing, MI (United States)
  9. Georgia Inst. of Technology, Atlanta, GA (United States)
  10. Northern Arizona Univ., Flagstaff, AZ (United States)
  11. Univ. of Oklahoma, Norman, OK (United States); Tsinghua Univ., Beijing (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1631626
Grant/Contract Number:  
AC02-05CH11231; SC0004601; SC0010715; 41430856; 41877048; 41825016
Resource Type:
Accepted Manuscript
Journal Name:
Microbiome
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2049-2618
Publisher:
BioMed Central
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Feng, Jiajie, Wang, Cong, Lei, Jiesi, Yang, Yunfeng, Yan, Qingyun, Zhou, Xishu, Tao, Xuanyu, Ning, Daliang, Yuan, Mengting M., Qin, Yujia, Shi, Zhou J., Guo, Xue, He, Zhili, Van Nostrand, Joy D., Wu, Liyou, Bracho-Garillo, Rosvel G., Penton, C. Ryan, Cole, James R., Konstantinidis, Konstantinos T., Luo, Yiqi, Schuur, Edward A. G., Tiedje, James M., and Zhou, Jizhong. Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community. United States: N. p., 2020. Web. doi:10.1186/s40168-019-0778-3.
Feng, Jiajie, Wang, Cong, Lei, Jiesi, Yang, Yunfeng, Yan, Qingyun, Zhou, Xishu, Tao, Xuanyu, Ning, Daliang, Yuan, Mengting M., Qin, Yujia, Shi, Zhou J., Guo, Xue, He, Zhili, Van Nostrand, Joy D., Wu, Liyou, Bracho-Garillo, Rosvel G., Penton, C. Ryan, Cole, James R., Konstantinidis, Konstantinos T., Luo, Yiqi, Schuur, Edward A. G., Tiedje, James M., & Zhou, Jizhong. Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community. United States. https://doi.org/10.1186/s40168-019-0778-3
Feng, Jiajie, Wang, Cong, Lei, Jiesi, Yang, Yunfeng, Yan, Qingyun, Zhou, Xishu, Tao, Xuanyu, Ning, Daliang, Yuan, Mengting M., Qin, Yujia, Shi, Zhou J., Guo, Xue, He, Zhili, Van Nostrand, Joy D., Wu, Liyou, Bracho-Garillo, Rosvel G., Penton, C. Ryan, Cole, James R., Konstantinidis, Konstantinos T., Luo, Yiqi, Schuur, Edward A. G., Tiedje, James M., and Zhou, Jizhong. Fri . "Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community". United States. https://doi.org/10.1186/s40168-019-0778-3. https://www.osti.gov/servlets/purl/1631626.
@article{osti_1631626,
title = {Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community},
author = {Feng, Jiajie and Wang, Cong and Lei, Jiesi and Yang, Yunfeng and Yan, Qingyun and Zhou, Xishu and Tao, Xuanyu and Ning, Daliang and Yuan, Mengting M. and Qin, Yujia and Shi, Zhou J. and Guo, Xue and He, Zhili and Van Nostrand, Joy D. and Wu, Liyou and Bracho-Garillo, Rosvel G. and Penton, C. Ryan and Cole, James R. and Konstantinidis, Konstantinos T. and Luo, Yiqi and Schuur, Edward A. G. and Tiedje, James M. and Zhou, Jizhong},
abstractNote = {BACKGROUND:It is well-known that global warming has effects on high-latitude tundra underlain with permafrost. This leads to a severe concern that decomposition of soil organic carbon (SOC) previously stored in this region, which accounts for about 50% of the world's SOC storage, will cause positive feedback that accelerates climate warming. We have previously shown that short-term warming (1.5 years) stimulates rapid, microbe-mediated decomposition of tundra soil carbon without affecting the composition of the soil microbial community (based on the depth of 42684 sequence reads of 16S rRNA gene amplicons per 3 g of soil sample). RESULTS:We show that longer-term (5 years) experimental winter warming at the same site altered microbial communities (p < 0.040). Thaw depth correlated the strongest with community assembly and interaction networks, implying that warming-accelerated tundra thaw fundamentally restructured the microbial communities. Both carbon decomposition and methanogenesis genes increased in relative abundance under warming, and their functional structures strongly correlated (R2 > 0.725, p < 0.001) with ecosystem respiration or CH4 flux. CONCLUSIONS:Our results demonstrate that microbial responses associated with carbon cycling could lead to positive feedbacks that accelerate SOC decomposition in tundra regions, which is alarming because SOC loss is unlikely to subside owing to changes in microbial community composition. Video Abstract.},
doi = {10.1186/s40168-019-0778-3},
journal = {Microbiome},
number = 1,
volume = 8,
place = {United States},
year = {Fri Jan 17 00:00:00 EST 2020},
month = {Fri Jan 17 00:00:00 EST 2020}
}

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