气候变化领域集成服务门户(CCPortal): Shifting from a thermal-constrained to water-constrained ecosystem over the Tibetan Plateau

CCPortal

DOI	10.3389/fpls.2023.1125288
	Shifting from a thermal-constrained to water-constrained ecosystem over the Tibetan Plateau
	Xu, Chaoyi; Liu, Dan; Wang, Xiaoyi; Wang, Tao
发表日期	2023
ISSN	1664-462X
卷号	14
英文摘要	IntroductionUnderstanding the seasonality of vegetation growth is important for maintaining sustainable development of grassland livestock systems over the Tibetan Plateau (TP). Current knowledge of changes in the seasonality of TP grasslands is restricted to spring and autumn phenology, with little known about the date of peak vegetation growth, the most relevant quantity for grassland productivity. MethodsWe investigate the shifts of the date of peak vegetation growth and its climatic controls for the alpine grasslands over the TP during 2001-2020 using a framework based on the law of minimum, which is based on the assumption that peak vegetation growth would be consistent with the peak timing of the most limiting climatic resource. ResultsThe date of peak vegetation growth over the TP advanced by 0.81 days decade-1 during 2001-2020. This spring-ward shift mainly occurs in the semi-humid eastern TP, where the peak growth date tracks the advancing peak precipitation, and shifted towards the timing of peak temperature. The advancing peak growth over the eastern TP significantly stimulated the ecosystem production by 1.99 gCm-2 year-1 day-1 during 2001-2020, while this positive effect weakened from 3.02 gCm-2 year-1 day-1 during 2000s to 1.25 gCm-2 year-1 day-1 during 2010s. DiscussionOur results highlighted the importance of water availability in vegetation growth over the TP, and indicated that the TP grassland is moving towards a tipping point of transition from thermal-constrained to water-constrained ecosystem under the rapid warming climate.
关键词	date of peak vegetation growth climate constraint alpine grassland Tibetan Plateau ecosystem production
英文关键词	CLIMATE-CHANGE; PHENOLOGY; IMPACTS; ENERGY; EVAPOTRANSPIRATION; GRASSLAND; FEEDBACKS; BALANCE; DATASET
WOS研究方向	Plant Sciences
WOS记录号	WOS:000980520500001
来源期刊	FRONTIERS IN PLANT SCIENCE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283791
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Xu, Chaoyi,Liu, Dan,Wang, Xiaoyi,et al. Shifting from a thermal-constrained to water-constrained ecosystem over the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2023,14.
APA	Xu, Chaoyi,Liu, Dan,Wang, Xiaoyi,&Wang, Tao.(2023).Shifting from a thermal-constrained to water-constrained ecosystem over the Tibetan Plateau.FRONTIERS IN PLANT SCIENCE,14.
MLA	Xu, Chaoyi,et al."Shifting from a thermal-constrained to water-constrained ecosystem over the Tibetan Plateau".FRONTIERS IN PLANT SCIENCE 14(2023).