干旱区生态环境知识资源中心(Arid): Spatial-temporal variations of ecological vulnerability in the Tarim River Basin, Northwest China

Arid

	Spatial-temporal variations of ecological vulnerability in the Tarim River Basin, Northwest China
	Bai Jie; Li Junli; Bao Anmin; Chang Cun
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2021
卷号	13 期号:8 页码:814-834
英文摘要	As the largest inland river basin of China, the Tarim River Basin (TRB), known for its various natural resources and fragile environment, has an increased risk of ecological crisis due to the intensive exploitation and utilization of water and land resources. Since the Ecological Water Diversion Project (EWDP), which was implemented in 2001 to save endangered desert vegetation, there has been growing evidence of ecological improvement in local regions, but few studies have performed a comprehensive ecological vulnerability assessment of the whole TRB. This study established an evaluation framework integrating the analytic hierarchy process (AHP) and entropy method to estimate the ecological vulnerability of the TRB covering climatic, ecological, and socioeconomic indicators during 2000-2017. Based on the geographical detector model, the importance of ten driving factors on the spatial-temporal variations of ecological vulnerability was explored. The results showed that the ecosystem of the TRB was fragile, with more than half of the area (57.27%) dominated by very heavy and heavy grades of ecological vulnerability, and 28.40% of the area had potential and light grades of ecological vulnerability. The light grade of ecological vulnerability was distributed in the northern regions (Aksu River and Weigan River catchments) and western regions (Kashgar River and Yarkant River catchments), while the heavy grade was located in the southern regions (Kunlun Mountains and Qarqan River catchments) and the Mainstream catchment. The ecosystems in the western and northern regions were less vulnerable than those in the southern and eastern regions. From 2000 to 2017,the overall improvement in ecological vulnerability in the whole TRB showed that the areas with great ecological improvement increased by 46.11%, while the areas with ecological degradation decreased by 9.64%. The vegetation cover and potential evapotranspiration (PET) were the obvious driving factors, explaining 57.56% and 21.55% of the changes in ecological vulnerability across the TRB, respectively. In terms of ecological vulnerability grade changes, obvious spatial differences were observed in the upper, middle, and lower reaches of the TRB due to the different vegetation and hydrothermal conditions. The alpine source region of the TRB showed obvious ecological improvement due to increased precipitation and temperature, but the alpine meadow of the Kaidu River catchment in the Middle Tianshan Mountains experienced degradation associated with overgrazing and local drought. The improved agricultural management technologies had positive effects on farmland ecological improvement, while the desert vegetation in oasis-desert ecotones showed a decreasing trend as a result of cropland reclamation and intensive drought. The desert riparian vegetation in the lower reaches of the Tarim River was greatly improved due to the implementation of the EWDP, which has been active for tens of years. These results provide comprehensive knowledge about ecological processes and mechanisms in the whole TRB and help to develop environmental restoration measures based on different ecological vulnerability grades in each sub-catchment.
英文关键词	ecological vulnerability ecological improvement ecological degradation AHP-entropy method climate change human activities Tarim River Basin
类型	Article
语种	英语
收录类别	CSCD
WOS类目	History
CSCD记录号	CSCD:7054407
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377426
作者单位	Bai Jie, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Key Laboratory of GIS & RS Application Xinjiang Uygur Autonomous Region;;University of Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;;Key Laboratory of GIS & RS Application Xinjiang Uygur Autonomous Region;;, Urumqi;;Urumqi;;, ;;;;Beijing 830011;;830011;;100049.; Li Junli, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Key Laboratory of GIS & RS Application Xinjiang Uygur Autonomous Region;;University of Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;;Key Laboratory of GIS & RS Application Xinjiang Uygur Autonomous Region;;, Urumqi;;Urumqi;;, ;;;;Beijing 830011;;830011;;100049.; Bao Anmin, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Key Laboratory of GIS & RS Application Xinjiang Uygur Autonomous Region;;University of Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;;Key Labora...
推荐引用方式 GB/T 7714	Bai Jie,Li Junli,Bao Anmin,et al. Spatial-temporal variations of ecological vulnerability in the Tarim River Basin, Northwest China[J],2021,13(8):814-834.
APA	Bai Jie,Li Junli,Bao Anmin,&Chang Cun.(2021).Spatial-temporal variations of ecological vulnerability in the Tarim River Basin, Northwest China.Journal of Arid Land,13(8),814-834.
MLA	Bai Jie,et al."Spatial-temporal variations of ecological vulnerability in the Tarim River Basin, Northwest China".Journal of Arid Land 13.8(2021):814-834.