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Abrupt vegetation shifts caused by gradual climate changes in central Asia during the Holocene
Zhao, Yan1,2; Liu, YaoLiang1,2; Guo, ZhengTang2,3,4; Fang, KeYan5; Li, Quan1; Cao, XianYong6
2017-07-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume60Issue:7Pages:1317-1327
Corresponding AuthorZhao, Yan(zhaoyan@igsnrr.ac.cn)
AbstractUnderstanding the response of ecosystems to past climate is critical for evaluating the impacts of future climate changes. A large-scale abrupt shift of vegetation in response to the Holocene gradual climate changes has been well documented for the Sahara-Sahel ecosystem. Whether such a non-linear response is of universal significance remains to be further addressed. Here, we examine the vegetation-climate relationships in central Asia based on a compilation of 38 high-quality pollen records. The results show that the Holocene vegetation experienced two major abrupt shifts, one in the early Holocene (Shift I, establishing shift) and another in the late Holocene (Shift II, collapsing shift), while the mid-Holocene vegetation remained rather stable. The timings of these shifts in different regions are asynchronous, which are not readily linkable with any known abrupt climate shifts, but are highly correlated with the local rainfalls. These new findings suggest that the observed vegetation shifts are attributable to the threshold effects of the orbital-induced gradual climate changes. During the early Holocene, the orbital-induced precipitation increase would have first reached the threshold for vegetation "establishment" for moister areas, but significantly later for drier areas. In contrast, the orbital-induced precipitation decrease during the late Holocene would have first reached the threshold, and led to the vegetation "collapse" for drier areas, but delayed for moister areas. The well-known 4.2 kyr BP drought event and human intervention would have also helped the vegetation collapses at some sites. These interpretations are strongly supported by our surface pollen-climate analyses and ecosystem simulations. These results also imply that future climate changes may cause abrupt changes in the dry ecosystem once the threshold is reached.
KeywordFossil pollen Vegetation response Threshold effects Holocene climate Central Asia
DOI10.1007/s11430-017-9047-7
WOS KeywordNORTH-ATLANTIC CLIMATE ; LAST GLACIAL MAXIMUM ; MOISTURE EVOLUTION ; HIGH-RESOLUTION ; SUMMER MONSOON ; INNER-MONGOLIA ; CHINA ; ECOSYSTEMS ; DYNAMICS ; RESPONSES
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41330105] ; National Natural Science Foundation of China[41690113] ; National Natural Science Foundation of China[41430531] ; National Key Research and Development Program of China[2016YFA0600501] ; Chinese Academy of Sciences Strategic Priority Research Program[XDB03030000]
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences Strategic Priority Research Program
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000406020600009
PublisherSCIENCE PRESS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/62775
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhao, Yan
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Fujian, Peoples R China
6.Alfred Wegener Inst, Helmholtz Ctr Polar & Marine Res, D-14473 Potsdam, Germany
Recommended Citation
GB/T 7714
Zhao, Yan,Liu, YaoLiang,Guo, ZhengTang,et al. Abrupt vegetation shifts caused by gradual climate changes in central Asia during the Holocene[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(7):1317-1327.
APA Zhao, Yan,Liu, YaoLiang,Guo, ZhengTang,Fang, KeYan,Li, Quan,&Cao, XianYong.(2017).Abrupt vegetation shifts caused by gradual climate changes in central Asia during the Holocene.SCIENCE CHINA-EARTH SCIENCES,60(7),1317-1327.
MLA Zhao, Yan,et al."Abrupt vegetation shifts caused by gradual climate changes in central Asia during the Holocene".SCIENCE CHINA-EARTH SCIENCES 60.7(2017):1317-1327.
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