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Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas
Sigdel, SR (Sigdel, Shalik Ram)1,2,3; Wang, YF (Wang, Yafeng)1,4,5; Camarero, JJ (Julio Camarero, Jesus)6; Zhu, HF (Zhu, Haifeng)1,2,7; Liang, EY (Liang, Eryuan)1,2; Penuelas, J (Penuelas, Josep)8,9
Source PublicationGLOBAL CHANGE BIOLOGY
2018-11-01
Volume24Issue:11Pages:5549-5559
DOI10.1111/gcb.14428
Abstract

Among forest ecosystems, the alpine treeline ecotone can be considered to be a simplified model to study global ecology and climate change. Alpine treelines are expected to shift upwards in response to global warming given that tree recruitment and growth are assumed to be mainly limited by low temperatures. However, little is known whether precipitation and temperature interact to drive long-term Himalayan treeline dynamics. Tree growth is affected by spring rainfall in the central Himalayan treelines, being good locations for testing if, in addition to temperature, precipitation mediates treeline dynamics. To test this hypothesis, we reconstructed spatiotemporal variations in treeline dynamics in 20 plots located at six alpine treeline sites, dominated by two tree species (birch, fir), and situated along an east-west precipitation gradient in the central Himalayas. Our reconstructions evidenced that treelines shifted upward in response to recent climate warming, but their shift rates were primarily mediated by spring precipitation. The rate of upward shift was higher in the wettest eastern Himalayas, suggesting that its ascent rate was facilitated by spring precipitation. The drying tendency in association with the recent warming trends observed in the central Himalayas, however, will likely hinder an upslope advancement of alpine treelines and promote downward treeline shifts if moisture availability crosses a critical minimum threshold. Our study highlights the complexity of plant responses to climate and the need to consider multiple climate factors when analyzing treeline dynamics.

Subject Area生态学
WOS IDWOS:000447760300041
Language英语
Indexed BySCIE
KeywordClimate-change Alpine Treelines Abies-spectabilis Spatial-patterns Tibetan Plateau Rocky-mountains Betula-utilis Forest Dynamics Recruitment
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Ecology ; Environmental Sciences
Cooperation Status国际
ISSN1354-1013
Department高寒生态重点实验室
PublisherWILEY
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8517
Collection图书馆
Corresponding AuthorLiang, EY (Liang, Eryuan)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China;
3.Univ Chinese Acad Sci, Beijing, Peoples R China;
4.Nanjing Forestry Univ, Coll Biol, Nanjing, Jiangsu, Peoples R China;
5.Nanjing Forestry Univ, Coll Environm, Nanjing, Jiangsu, Peoples R China;
6.CSIC, IPE, Zaragoza, Spain;
7.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
8.CSIC, Global Ecol Unit CREAF CSIC UAB, Barcelona, Catalonia, Spain;
9.CREAF, Barcelona, Catalonia, Spain.
Recommended Citation
GB/T 7714
Sigdel, SR ,Wang, YF ,Camarero, JJ ,et al. Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas[J]. GLOBAL CHANGE BIOLOGY,2018,24(11):5549-5559.
APA Sigdel, SR ,Wang, YF ,Camarero, JJ ,Zhu, HF ,Liang, EY ,&Penuelas, J .(2018).Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas.GLOBAL CHANGE BIOLOGY,24(11),5549-5559.
MLA Sigdel, SR ,et al."Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas".GLOBAL CHANGE BIOLOGY 24.11(2018):5549-5559.
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