干旱区生态环境知识资源中心(Arid): Synergistic changes in precipitation and soil water use efficiency and their driving mechanisms of terrestrial ecosystems in China

Arid

DOI	10.1016/j.jclepro.2023.139159
	Synergistic changes in precipitation and soil water use efficiency and their driving mechanisms of terrestrial ecosystems in China
	Li, Chao; Zhang, Shiqiang
通讯作者	Zhang, SQ
来源期刊	JOURNAL OF CLEANER PRODUCTION
ISSN	0959-6526
EISSN	1879-1786
出版年	2023
卷号	426
英文摘要	Soil water use efficiency (SWUE) and precipitation use efficiency (PUE) are paramount indicators in examining the coupling mechanism of carbon and water cycles in terrestrial vegetation ecosystems. However, the mechanisms influencing variations in PUE and SWUE warrant further investigation due to existing research gaps. The gross primary productivity (GPP) and net primary productivity (NPP) in China were simulated using the TL-LUE model and improved CASA model, respectively. PUE and SWUE were then calculated in conjunction with precipitation and soil water data. A further investigation was conducted on the joint evolutionary patterns of PUE and SWUE. The impact of factors such as climate change, vegetation variation, carbon dioxide emission, and human activities on PUE and SWUE was separately identified using partial derivatives and elasticity coefficients. The results suggest an insignificant downward in PUE and a significant upward trend in SWUE in China from the period of 2000-2018. Notably, drought mitigation in the arid zone led to a steeper decrease in PUE compared to humid, sub-humid and semi-arid zones. Drought mitigation resulted in a decrease of SWUE in arid zones, yet an increase in humid, sub-humid and semi-arid zones. The correlations between vegetation change and precipitation and PUE or SWUE, respectively, were predominantly influenced by changes in drought conditions. NPP and precipitation collectively dominated the alterations in PUE, contributing 41.55% and -58.45%, respectively. However, GPP exerted a more substantial influence on SWUE compared to precipitation, with notable contributions of 93.93% and -6.07%, respectively. The contributions to PUE from climate variation, human activities, vegetation change and carbon dioxide were -57%, 30%, 12% and -1%, respectively. Simultaneously, the contributions to SWUE from these same factors appeared as 20%, 63%, 16% and 1%, respectively. This study intends to augment the comprehension of the influence exerted by global climate change and human activities on the correlation between carbon and water in terrestrial vegetation ecosystems.
英文关键词	Carbon-water coupling Soil water-precipitation use efficiency Partial derivative Drought response Human activities
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001088816700001
WOS关键词	LIGHT USE EFFICIENCY ; CARBON ; VEGETATION ; SIMULATION ; DYNAMICS ; MODEL
WOS类目	Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS研究方向	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397232
推荐引用方式 GB/T 7714	Li, Chao,Zhang, Shiqiang. Synergistic changes in precipitation and soil water use efficiency and their driving mechanisms of terrestrial ecosystems in China[J],2023,426.
APA	Li, Chao,&Zhang, Shiqiang.(2023).Synergistic changes in precipitation and soil water use efficiency and their driving mechanisms of terrestrial ecosystems in China.JOURNAL OF CLEANER PRODUCTION,426.
MLA	Li, Chao,et al."Synergistic changes in precipitation and soil water use efficiency and their driving mechanisms of terrestrial ecosystems in China".JOURNAL OF CLEANER PRODUCTION 426(2023).