干旱区生态环境知识资源中心(Arid): Dynamic process of ecosystem water use efficiency and response to drought in the Yellow River Basin, China

Arid

DOI	10.1016/j.scitotenv.2024.173339
	Dynamic process of ecosystem water use efficiency and response to drought in the Yellow River Basin, China
	Liu, SaiHua; Xue, Lianqing; Xiao, Ying; Yang, Mingjie; Liu, Yuanhong; Han, Qiang; Ma, Jingtian
通讯作者	Xue, LQ
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	934
英文摘要	Ecosystem water use efficiency (WUE) is a crucial indicator of the impact of climate change on terrestrial ecosystems, reflecting the balance between biological processes (photosynthesis and transpiration) and physical processes (evapotranspiration). However, the response mechanisms and driving processes of WUE to drought remain to be further understood. In this study, we analyzed the spatial and temporal dynamics and response mechanisms of WUE in the Yellow River Basin (YRB) using data on Gross Primary Productivity (GPP), Evapotranspiration (ET) and Standardized Precipitation Evapotranspiration Index (SPEI), which revealed the cumulative effect of drought on WUE and assessed the ecosystem's resilience. The study results showed that (1) GPP, ET and WUE in the YRB exhibited a significant increasing trend, with 63.04 % of the area showing a marked increase in WUE. (2) GPP was the dominant factor influencing WUE in 65.36 % of the area, particularly in cropland and grassland, while ET was more influential in forested areas. Vapor pressure deficit (VPD) was identified as the principal driver affecting vegetation GPP in semi -arid and semi -humid regions of the YRB. In contrast, soil moisture (SM) was the limiting factor in arid areas. (3) 71.00 % of the WUE in the basin was affected by drought cumulative effects, with an average cumulative duration of 4.5 months. Arid regions experienced the most extended duration of 7.29 months, compared to 3.05 months in semi -humid regions. (4) 74.85 % of the regional ecosystems exhibited ecological resilience to drought, particularly in the source areas of the western basin of the YRB. Shrublands have the highest drought resilience among vegetation types, while grasslands have the lowest. The resilience of each climatic zone was in the order of semi -humid, semi -arid, and arid order. This study comprehensively analyzed of the spatial and temporal dynamics and response mechanisms of WUE in the YRB, offering a new perspective and scientific basis for understanding and predicting the ecosystem response to climate change.
英文关键词	Water use efficiency Yellow River Basin Droughts Cumulative effect SPEI Ecosystem resilience
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001243454700001
WOS关键词	LOESS PLATEAU ; HYDROCLIMATIC DISTURBANCES ; PRODUCTIVITY ; RESILIENCE ; DATASET ; CARBON ; FLUX
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405501
推荐引用方式 GB/T 7714	Liu, SaiHua,Xue, Lianqing,Xiao, Ying,et al. Dynamic process of ecosystem water use efficiency and response to drought in the Yellow River Basin, China[J],2024,934.
APA	Liu, SaiHua.,Xue, Lianqing.,Xiao, Ying.,Yang, Mingjie.,Liu, Yuanhong.,...&Ma, Jingtian.(2024).Dynamic process of ecosystem water use efficiency and response to drought in the Yellow River Basin, China.SCIENCE OF THE TOTAL ENVIRONMENT,934.
MLA	Liu, SaiHua,et al."Dynamic process of ecosystem water use efficiency and response to drought in the Yellow River Basin, China".SCIENCE OF THE TOTAL ENVIRONMENT 934(2024).