人为干扰对生态脆弱性动态演变过程的影响——以兰西城市群为例

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Abstract Taking the Lanzhou-Xining urban agglomeration as an example, this paper uses the spatial principal component analysis (SPCA) method to evaluate its ecological vulnerability, and introduces the human disturbance index (HI) on this basis to explore the impact of human disturbance change on the dynamic evolution of ecological vulnerability. The results show that from 1990 to 2020, the ecological vulnerability of Lanzhou-Xining urban agglomeration decreased from 3.14 to 2.69, and the ecological environment improved year by year. Spatially, the medium, strong and extremely vulnerable areas are mainly concentrated in the valley basins in the central and western regions and the low-altitude areas in the east, while the negligible and light vulnerable areas are mainly concentrated in the higher altitude of the central and western regions. From 1990 to 2020, Moran's I increased slightly from 0.942 to 0.955, indicating an obvious spatial aggregation effect of ecological vulnerability. From 1990 to 2020, the ecological deterioration area decreased by 178.63km², and the ecological improvement area increased by 7189.08km². The ecological deterioration area was mainly distributed in the valley basin and the northeast region, while the ecological improvement area was mainly distributed in the southeast and the higher elevation areas in the central and western regions. The human disturbance index increased from 0.245 to 0.252, and the spatial distribution characteristics of the moderate-high interference area and the ecological deterioration area were basically consistent. With the increased level of human disturbance, the ecological environment of the river valley basin and the northeast area deteriorates gradually. The research results can provide useful reference for ecological protection, land resource utilization and sustainable development of Lanzhou-Xining urban agglomeration.

Key words： ecological vulnerability spatial principal component human disturbance land use type Lanzhou-Xining urban agglomeration

Received: 22 July 2022

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	SHI Jing
	SHI Pei-ji
	WANG Zi-yang
	WAN Ya

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SHI Jing,SHI Pei-ji,WANG Zi-yang等. Effects of human disturbances on dynamic evolution of ecological vulnerability: A case study over Lanzhou-Xining urban agglomeration[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(3): 1317-1327.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I3/1317

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