Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria
Background: In a warmer world, microbial decomposition of previously frozen organic carbon (C) is one of the most likely positive climate feedbacks of permafrost regions to the atmosphere. However, mechanistic understanding of microbial mediation on chemically recalcitrant C instability is limited;...
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ftosti:oai:osti.gov:1695732 2023-07-30T04:01:55+02:00 Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria Tao, Xuanyu Feng, Jiajie Yang, Yunfeng Wang, Gangsheng Tian, Renmao Fan, Fenliang Ning, Daliang Bates, Colin T. Hale, Lauren Yuan, Mengting M. Wu, Linwei Gao, Qun Lei, Jiesi Schuur, Edward A. G. Yu, Julian Bracho, Rosvel Luo, Yiqi Konstantinidis, Konstantinos T. Johnston, Eric R. Cole, James R. Penton, C. Ryan Tiedje, James M. Zhou, Jizhong 2022-05-30 application/pdf http://www.osti.gov/servlets/purl/1695732 https://www.osti.gov/biblio/1695732 https://doi.org/10.1186/s40168-020-00838-5 unknown http://www.osti.gov/servlets/purl/1695732 https://www.osti.gov/biblio/1695732 https://doi.org/10.1186/s40168-020-00838-5 doi:10.1186/s40168-020-00838-5 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1186/s40168-020-00838-5 2023-07-11T09:51:28Z Background: In a warmer world, microbial decomposition of previously frozen organic carbon (C) is one of the most likely positive climate feedbacks of permafrost regions to the atmosphere. However, mechanistic understanding of microbial mediation on chemically recalcitrant C instability is limited; thus, it is crucial to identify and evaluate active decomposers of chemically recalcitrant C, which is essential for predicting C-cycle feedbacks and their relative strength of influence on climate change. Using stable isotope probing of the active layer of Arctic tundra soils after depleting soil labile C through a 975-day laboratory incubation, the identity of microbial decomposers of lignin and, their responses to warming were revealed. Results: The β - Proteobacteria genus Burkholderia accounted for 95.1% of total abundance of potential lignin decomposers. Consistently, Burkholderia isolated from our tundra soils could grow with lignin as the sole C source. A 2.2 °C increase of warming considerably increased total abundance and functional capacities of all potential lignin decomposers. In addition to Burkholderia , α - Proteobacteria capable of lignin decomposition (e.g. Bradyrhizobium and Methylobacterium genera) were stimulated by warming by 82-fold. Those community changes collectively doubled the priming effect, i.e., decomposition of existing C after fresh C input to soil. Consequently, warming aggravates soil C instability, as verified by microbially enabled climate-C modeling. Conclusions: Our findings are alarming, which demonstrate that accelerated C decomposition under warming conditions will make tundra soils a larger biospheric C source than anticipated. Other/Unknown Material Arctic Climate change permafrost Tundra Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Microbiome 8 1 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Tao, Xuanyu Feng, Jiajie Yang, Yunfeng Wang, Gangsheng Tian, Renmao Fan, Fenliang Ning, Daliang Bates, Colin T. Hale, Lauren Yuan, Mengting M. Wu, Linwei Gao, Qun Lei, Jiesi Schuur, Edward A. G. Yu, Julian Bracho, Rosvel Luo, Yiqi Konstantinidis, Konstantinos T. Johnston, Eric R. Cole, James R. Penton, C. Ryan Tiedje, James M. Zhou, Jizhong Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Background: In a warmer world, microbial decomposition of previously frozen organic carbon (C) is one of the most likely positive climate feedbacks of permafrost regions to the atmosphere. However, mechanistic understanding of microbial mediation on chemically recalcitrant C instability is limited; thus, it is crucial to identify and evaluate active decomposers of chemically recalcitrant C, which is essential for predicting C-cycle feedbacks and their relative strength of influence on climate change. Using stable isotope probing of the active layer of Arctic tundra soils after depleting soil labile C through a 975-day laboratory incubation, the identity of microbial decomposers of lignin and, their responses to warming were revealed. Results: The β - Proteobacteria genus Burkholderia accounted for 95.1% of total abundance of potential lignin decomposers. Consistently, Burkholderia isolated from our tundra soils could grow with lignin as the sole C source. A 2.2 °C increase of warming considerably increased total abundance and functional capacities of all potential lignin decomposers. In addition to Burkholderia , α - Proteobacteria capable of lignin decomposition (e.g. Bradyrhizobium and Methylobacterium genera) were stimulated by warming by 82-fold. Those community changes collectively doubled the priming effect, i.e., decomposition of existing C after fresh C input to soil. Consequently, warming aggravates soil C instability, as verified by microbially enabled climate-C modeling. Conclusions: Our findings are alarming, which demonstrate that accelerated C decomposition under warming conditions will make tundra soils a larger biospheric C source than anticipated. |
author |
Tao, Xuanyu Feng, Jiajie Yang, Yunfeng Wang, Gangsheng Tian, Renmao Fan, Fenliang Ning, Daliang Bates, Colin T. Hale, Lauren Yuan, Mengting M. Wu, Linwei Gao, Qun Lei, Jiesi Schuur, Edward A. G. Yu, Julian Bracho, Rosvel Luo, Yiqi Konstantinidis, Konstantinos T. Johnston, Eric R. Cole, James R. Penton, C. Ryan Tiedje, James M. Zhou, Jizhong |
author_facet |
Tao, Xuanyu Feng, Jiajie Yang, Yunfeng Wang, Gangsheng Tian, Renmao Fan, Fenliang Ning, Daliang Bates, Colin T. Hale, Lauren Yuan, Mengting M. Wu, Linwei Gao, Qun Lei, Jiesi Schuur, Edward A. G. Yu, Julian Bracho, Rosvel Luo, Yiqi Konstantinidis, Konstantinos T. Johnston, Eric R. Cole, James R. Penton, C. Ryan Tiedje, James M. Zhou, Jizhong |
author_sort |
Tao, Xuanyu |
title |
Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria |
title_short |
Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria |
title_full |
Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria |
title_fullStr |
Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria |
title_full_unstemmed |
Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria |
title_sort |
winter warming in alaska accelerates lignin decomposition contributed by proteobacteria |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1695732 https://www.osti.gov/biblio/1695732 https://doi.org/10.1186/s40168-020-00838-5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost Tundra Alaska |
genre_facet |
Arctic Climate change permafrost Tundra Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1695732 https://www.osti.gov/biblio/1695732 https://doi.org/10.1186/s40168-020-00838-5 doi:10.1186/s40168-020-00838-5 |
op_doi |
https://doi.org/10.1186/s40168-020-00838-5 |
container_title |
Microbiome |
container_volume |
8 |
container_issue |
1 |
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1772812657480433664 |