干旱区生态环境知识资源中心(Arid): Annual ecosystem respiration is resistant to changes in freeze-thaw periods in semi-arid permafrost

Arid

DOI	10.1111/gcb.14979
	Annual ecosystem respiration is resistant to changes in freeze-thaw periods in semi-arid permafrost
	Wang, Qi 1,2; Lv, Wangwang 1,2; Li, Bowen 1,2; Zhou, Yang 1,2; Jiang, Lili 1; Piao, Shilong 1,3; Wang, Yanfen 2,3; Zhang, Lirong 1; Meng, Fandong 1; Liu, Peipei 1,2; Hong, Huan 1,2; Li, Yaoming 4; Dorji, Tsechoe 1,5; Luo, Caiyun 5; Zhang, Zhenhua 5; Ciais, Philippe 6; Penuelas, Josep 7,8; Kardol, Paul 9; Zhou, Huakun 5; Wang, Shiping 1,3
通讯作者	Wang, Shiping
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2020
卷号	26 期号:4 页码:2630-2641
英文摘要	Warming in cold regions alters freezing and thawing (F-T) of soil in winter, exposing soil organic carbon to decomposition. Carbon-rich permafrost is expected to release more CO2 to the atmosphere through ecosystem respiration (Re) under future climate scenarios. However, the mechanisms of the responses of freeze-thaw periods to climate change and their coupling with Re in situ are poorly understood. Here, using 2 years of continuous data, we test how changes in F-T events relate to annual Re under four warming levels and precipitation addition in a semi-arid grassland with discontinuous alpine permafrost. Warming shortened the entire F-T period because the frozen period shortened more than the extended freezing period. It decreased total Re during the F-T period mainly due to decrease in mean Re rate. However, warming did not alter annual Re because of reduced soil water content and the small contribution of total Re during the F-T period to annual Re. Although there were no effects of precipitation addition alone or interactions with warming on F-T events, precipitation addition increased total Re during the F-T period and the whole year. This decoupling between changes in soil freeze-thaw events and annual Re could result from their different driving factors. Our results suggest that annual Re could be mainly determined by soil water content rather than by change in freeze-thaw periods induced by warming in semi-arid alpine permafrost.
英文关键词	ecosystem respiration freeze-thaw events number and frequency of freeze-thaw cycles precipitation addition semi-arid with ice-poor permafrost Tibetan Plateau warming gradient
类型	Article
语种	英语
国家	Peoples R China ; France ; Spain ; Sweden
收录类别	SCI-E
WOS记录号	WOS:000513647700001
WOS关键词	CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; TIBETAN PLATEAU ; ALPINE MEADOW ; CARBON FLUXES ; CO2 EMISSIONS ; SOIL CARBON ; NITROGEN ; DYNAMICS ; CYCLES
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	北京林业大学 ; 中国科学院青藏高原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314634
作者单位	1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China; 4.Beijing Forestry Univ, Coll Grassland, Beijing, Peoples R China; 5.Chinese Acad Sci, Northwestern Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Area, Xining, Peoples R China; 6.UVSQ, Lab Sci Climat Environm, CEA, CNRS, Gif Sur Yvette, France; 7.CREAF, Barcelona, Spain; 8.UAB, CSIC, Global Ecol Unit, CREAF,CEAB, Barcelona, Spain; 9.Swedish Univ Agr Sci, Dept Forest Ecol & Management, Umea, Sweden
推荐引用方式 GB/T 7714	Wang, Qi,Lv, Wangwang,Li, Bowen,et al. Annual ecosystem respiration is resistant to changes in freeze-thaw periods in semi-arid permafrost[J]. 北京林业大学, 中国科学院青藏高原研究所,2020,26(4):2630-2641.
APA	Wang, Qi.,Lv, Wangwang.,Li, Bowen.,Zhou, Yang.,Jiang, Lili.,...&Wang, Shiping.(2020).Annual ecosystem respiration is resistant to changes in freeze-thaw periods in semi-arid permafrost.GLOBAL CHANGE BIOLOGY,26(4),2630-2641.
MLA	Wang, Qi,et al."Annual ecosystem respiration is resistant to changes in freeze-thaw periods in semi-arid permafrost".GLOBAL CHANGE BIOLOGY 26.4(2020):2630-2641.