气候变化领域集成服务门户(CCPortal): Decreasing elevational gradient in peak photosynthesis timing on the Tibetan Plateau

CCPortal

DOI	10.1016/j.agrformet.2023.109558
	Decreasing elevational gradient in peak photosynthesis timing on the Tibetan Plateau
	Liu, Yongwen; Ding, Jinzhi; Li, Peilin; Zhang, Rongrong; Zhao, Jingxue; Dorji, Tsechoe
发表日期	2023
ISSN	0168-1923
EISSN	1873-2240
卷号	339
英文摘要	The Tibetan Plateau has experienced elevation-dependent climate warming, which has profoundly influenced the seasonal dynamics of plant growth. However, how peak photosynthesis timing (DOYPmax), a key component of plant growth seasonality, responds to climate change on the Tibetan Plateau remains unclear. Here, we investigated the change in the elevational gradient in DOYPmax on the Tibetan Plateau during 2001-2018 and its drivers. We mapped the primary climatic constraint on plant photosynthesis and found that it was temperature at 3000-4000 m a.s.l. in the central and eastern parts but soil water at 4000-5000 m a.s.l. in the southwestern part. DOYPmax increased by 1.0 & PLUSMN; 0.1 days/100 m with increasing elevation from 3000 to 5000 m a.s.l., but the elevational gradient in DOYPmax decreased by -0.8 & PLUSMN; 0.2 days/100 m/decade during 2001-2018 due to both direct and indirect effects of climate change. Specifically, at 3000-4000 m a.s.l., DOYPmax was delayed because of the direct effect of the increase in soil water. At 4000-5000 m a.s.l., DOYPmax advanced due to the warminginduced earlier green-up date in the central plateau and the drought-induced later spring phenology in the southwestern plateau. Such a change in plant growth seasonality should alter seasonal carbon cycle of alpine ecosystems, summer diets of the migrant herbivores and alpine plant-animal interactions along elevation gradients, but further efforts are needed to clarify how herbivores that migrate long distances, e.g., Tibetan antelope, adapt to changes in the elevational gradient in peak plant growth timing.
关键词	Climate change Photosynthesis Elevational pattern Plant growth seasonality Third Pole Alpine ecosystem
英文关键词	VEGETATION PHENOLOGY; PLANT PHENOLOGY; CLIMATE-CHANGE; RESPONSES; TRENDS; SEASON
WOS研究方向	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001021234000001
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/283905
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Xi'an International Studies University; Lanzhou University; Lanzhou University; Tibet Academy of Agriculture & Animal Husbandry Sciences
推荐引用方式 GB/T 7714	Liu, Yongwen,Ding, Jinzhi,Li, Peilin,et al. Decreasing elevational gradient in peak photosynthesis timing on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2023,339.
APA	Liu, Yongwen,Ding, Jinzhi,Li, Peilin,Zhang, Rongrong,Zhao, Jingxue,&Dorji, Tsechoe.(2023).Decreasing elevational gradient in peak photosynthesis timing on the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,339.
MLA	Liu, Yongwen,et al."Decreasing elevational gradient in peak photosynthesis timing on the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 339(2023).