Reduced microbial stability in the active layer is associated with carbon loss under alpine permafrost degradation

Permafrost degradation may induce soil carbon (C) loss, critical for global C cycling, and be mediated by microbes. Despite larger C stored within the active layer of permafrost regions, which are more affected by warming, and the critical roles of Qinghai-Tibet Plateau in C cycling, most previous s...

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Published in:Proceedings of the National Academy of Sciences - PNAS Vol. 118; no. 25
Main Authors: Wu, Ming-Hui, Chen, Sheng-Yun, Chen, Jian-Wei, Xue, Kai, Chen, Shi-Long, Wang, Xiao-Ming, Chen, Tuo, Kang, Shi-Chang, Rui, Jun-Peng, Thies, Janice E, Bardgett, Richard D, Wang, Yan-Fen
Format: Journal Article
Language:English
Published: United States 22.06.2021
Subjects:
Biodiversity
Carbon - analysis
China
Environmental Microbiology
Microbiota
Organic Chemicals - analysis
Permafrost
Plants
Soil - chemistry
China
network stability
soil microbial community
soil carbon density
distance–decay relationship
permafrost degradation
ISSN:1091-6490, 1091-6490
Online Access:Get more information
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Summary:Permafrost degradation may induce soil carbon (C) loss, critical for global C cycling, and be mediated by microbes. Despite larger C stored within the active layer of permafrost regions, which are more affected by warming, and the critical roles of Qinghai-Tibet Plateau in C cycling, most previous studies focused on the permafrost layer and in high-latitude areas. We demonstrate in situ that permafrost degradation alters the diversity and potentially decreases the stability of active layer microbial communities. These changes are associated with soil C loss and potentially a positive C feedback. This study provides insights into microbial-mediated mechanisms responsible for C loss within the active layer in degraded permafrost, aiding in the modeling of C emission under future scenarios.
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ISSN:1091-6490
1091-6490
DOI:10.1073/pnas.2025321118