Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community
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 pos...
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ftcdlib:oai:escholarship.org:ark:/13030/qt3tm3v4dp 2024-01-14T10:09:51+01:00 Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community 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 AG Tiedje, James M Zhou, Jizhong 3 2020-12-01 application/pdf https://escholarship.org/uc/item/3tm3v4dp unknown eScholarship, University of California qt3tm3v4dp https://escholarship.org/uc/item/3tm3v4dp public Microbiome, vol 8, iss 1 Biological Sciences Ecology Carbon Carbon Cycle Global Warming Methane Microbiota Permafrost RNA Ribosomal 16S Seasons Soil Soil Microbiology Microbiology Medical Microbiology Evolutionary biology article 2020 ftcdlib 2023-12-18T19:07:32Z 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. Article in Journal/Newspaper permafrost Tundra University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Biological Sciences Ecology Carbon Carbon Cycle Global Warming Methane Microbiota Permafrost RNA Ribosomal 16S Seasons Soil Soil Microbiology Microbiology Medical Microbiology Evolutionary biology |
spellingShingle |
Biological Sciences Ecology Carbon Carbon Cycle Global Warming Methane Microbiota Permafrost RNA Ribosomal 16S Seasons Soil Soil Microbiology Microbiology Medical Microbiology Evolutionary biology 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 AG Tiedje, James M Zhou, Jizhong Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
topic_facet |
Biological Sciences Ecology Carbon Carbon Cycle Global Warming Methane Microbiota Permafrost RNA Ribosomal 16S Seasons Soil Soil Microbiology Microbiology Medical Microbiology Evolutionary biology |
description |
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. |
format |
Article in Journal/Newspaper |
author |
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 AG Tiedje, James M Zhou, Jizhong |
author_facet |
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 AG Tiedje, James M Zhou, Jizhong |
author_sort |
Feng, Jiajie |
title |
Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
title_short |
Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
title_full |
Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
title_fullStr |
Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
title_full_unstemmed |
Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
title_sort |
warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/3tm3v4dp |
op_coverage |
3 |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_source |
Microbiome, vol 8, iss 1 |
op_relation |
qt3tm3v4dp https://escholarship.org/uc/item/3tm3v4dp |
op_rights |
public |
_version_ |
1788064441395314688 |