Profound loss of microbial necromass carbon in permafrost thaw-subsidence in the central Tibetan Plateau

作     者：Wen-Ting ZHOU Quan-Lian LI Shi-Chang KANG Xiao-Dong WU Tian MA Xiao-Bo WU Xin XIONG Tanuj SHUKLA Maheswar RUPAKHETI Dipesh RUPAKHETI Da-He QIN Xiu-Feng YIN 

作者机构：Cryosphere Research Station on the Qinghai-Tibet PlateauState Key Laboratory of Cryospheric ScienceNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Key Laboratory of Cryospheric Science and Frozen Soil EngineeringNorhwest Instiute of Eco-Evironment and ResourcesChinese Academy of Scienes Lanzhou 730000China University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystemsand College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou730020China Lushan Botanical GardenChinese Academy of SciencesJiujiang 332900China Research Institute for Sustainability-Helmholtz Centre PotsdamPotsdam 14467Germany Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China 

出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)

年 卷 期：2024年第15卷第4期

页      面：647-657页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：This study was supported by the National Natural Science Foundation of China(U23A2062,32361133551) State Key Laboratory of Cryospheric Science(SKLCS-ZZ-2023) Second Tibetan Plateau Scientific Expedition and Research Program_(STEP,2019QZKK0605) NaturalScience FoundationoGf ansuProvince(21JR7RA500 and 22ZD6FA005) 

主　　题：Tibetan Plateau Thaw-subsidence Soil organic carbon Microbial necromass carbon Amino sugars 

摘      要：Climate warming is causing rapid permafrost degradation,including thaw-induced subsidence,potentially resulting in heightened carbon ***,our understanding of the levels and variations of carbon components in permafrost,particularly during the degradation process,remains *** uncertainties arising from this process lead to inaccurate assessments of the climate effects during permafrost *** vast expanses of permafrost in the Tibetan Plateau,there is limited research available on SOC components,particularly in the central Tibetan *** remarkable variations in hydrothermal conditions across different areas of the Tibetan Plateau,the existing limited studies make it challenging to assess the overall SOC components in the permafrost across the Tibetan Plateau and simulate their future *** this study,we examined the properties of soil organic carbon(SOC)and microbial necromass carbon(MicrobialNC)in a representative permafrost thaw-subsidence area at the southern edge of continuous permafrost in the central Tibetan *** results indicate that prior to the thaw-subsidence,the permafrost had a SOC content of 72.68±18.53 mg g^(-1),with MicrobialNC accounting for 49.6%.The thaw-subsidence of permafrost led to a 56.4%reduction in SOC,with MicrobialNC accounting for 70.0%of the lost *** constitutes the primary component of permafrost SOC,and it is the main component that is lost during thaw-subsidence *** in MicrobialNC are primarily correlated with factors pH,plant input,and microbial *** present study holds crucial implications for both the ecological and biogeochemical processes associated with carbon release from permafrost,and it furnishes essential data necessary for modeling the global response of permafrost to climate *** on this study and previous research,permafrost thawing in the Tibetan Plateau causes substantial loss of ***,there s remarkable heterogeneit