Divergent Trajectory of Soil Autotrophic and Heterotrophic Respiration upon Permafrost Thaw

doi:10.1021/acs.est.1c07575

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	Divergent Trajectory of Soil Autotrophic and Heterotrophic Respiration upon Permafrost Thaw
	Wang, Guanqin 2; Chen, Leiyi ; Zhang, Dianye ; Qin, Shuqi 2; Peng, Yunfeng ; Yang, Guibiao ; Wang, Jun 2; Yu, Jianchun 2; Wei, Bin 2; Liu, Yang 1
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2022
关键词	carbon cycle carbon-climate feedback permafrost ecosystem soil respiration thermokarst Tibetan Plateau
ISSN号	0013-936X
DOI	10.1021/acs.est.1c07575
文献子类	Article; Early Access
英文摘要	Warming-induced permafrost thaw may stimulate soil respiration (Rs) and thus cause a positive feedback to climate warming. However, due to the limited in situ observations, it remains unclear about how Rs and its autotrophic (Ra) and heterotrophic (Rh) components change upon permafrost thaw. Here we monitored variations in Rs and its components along a permafrost thaw sequence on the Tibetan Plateau, and explored the potential linkage of Rs components (i.e., Ra and Rh) with biotic (e.g., plant functional traits and soil microbial diversity) and abiotic factors (e.g., substrate quality). We found that Ra and Rh exhibited divergent responses to permafrost collapse: Ra increased with the time of thawing, while Rh exhibited a hump-shaped pattern along the thaw sequence. We also observed different drivers of thaw-induced changes in the ratios of Ra:Rs and Rh:Rs. Except for soil water status, plant community structure, diversity, and root properties explained the variation in Ra:Rs ratio, soil substrate quality and microbial diversity were key factors associated with the dynamics of Rh:Rs ratio. Overall, these findings demonstrate divergent patterns and drivers of Rs components as permafrost thaw prolongs, which call for considerations in Earth system models for better forecasting permafrost carbon-climate feedback.
学科主题	Engineering, Environmental ; Environmental Sciences
电子版国际标准刊号	1520-5851
出版地	WASHINGTON
WOS关键词	SPECIES RICHNESS ; TIBETAN PLATEAU ; ORGANIC-MATTER ; CARBON STORAGE ; CLIMATE-CHANGE ; DIVERSITY ; BIOMASS ; DEGRADATION ; MECHANISMS ; GRASSLANDS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000818695500001
资助机构	National Natural Science Foundation of China [31988102, 31825006, 91837312] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program [2019QZKK0106, 2019QZKK0302]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28972]
专题	植被与环境变化国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Agr Univ Hebei, Coll Resources & Environm Sci, Hebei Prov Key Lab Farmland Ecoenvironm, Baoding 071000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Guanqin,Chen, Leiyi,Zhang, Dianye,et al. Divergent Trajectory of Soil Autotrophic and Heterotrophic Respiration upon Permafrost Thaw[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022.
APA	Wang, Guanqin.,Chen, Leiyi.,Zhang, Dianye.,Qin, Shuqi.,Peng, Yunfeng.,...&Yang, Yuanhe.(2022).Divergent Trajectory of Soil Autotrophic and Heterotrophic Respiration upon Permafrost Thaw.ENVIRONMENTAL SCIENCE & TECHNOLOGY.
MLA	Wang, Guanqin,et al."Divergent Trajectory of Soil Autotrophic and Heterotrophic Respiration upon Permafrost Thaw".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022).