祁连山国家自然保护区生境质量时空特征及驱动因素分析

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Abstract This study analyzed the temporal and spatial characteristics of habitat quality and degradation degree in Qilian Mountain National Nature Reserve with the help of InVEST model, and used the spatial correlation of local Moran's I method and geographical detector to clarify the hot spot distribution, and the influencing factors and driving mechanism of the spatial and temporal differentiation of habitat quality were deeply discussed. The results indicate the following: the habitat quality gradually decreased from southeast to northwest. From 2000 to 2020, the areas of high habitat quality decreased year by year, while the areas of low and low habitat quality increased significantly. The habitat degradation areas were mainly concentrated in grassland and forest land near the threat sources (cultivated land, construction land, unused land, road); The hot spots of habitat quality were concentrated in the middle of the study area and distributed in a contiguous way. The hot spots in the east and west were mostly divided by cold spots. The area of the hot spots of habitat degradation was small, accounting for 6.72%~8.22% of the total area of the study area, but most of them were in the areas with good ecological conditions; The main driving factors affecting the spatial and temporal variation of habitat quality in Qilian Mountain National Nature Reserve were altitude, annual NDVI and population, and the relationship among these factors was nonlinear; Habitat quality was significantly positively correlated with average annual NDVI and precipitation, and negatively correlated with population. There were significant differences in habitat quality and degradation degree at different altitude gradients. The habitat quality and degradation degree were lower at the altitude gradient of 1751~2400m, while the habitat quality was higher at the altitude of 2400~2950m, The degree of habitat degradation is also large. In the future regional environmental protection and land resource utilization, further deterioration of habitat quality in low-altitude areas (1751~2400m) should be prevented. While reducing human activities, protection measures against climate change should be strengthened. Meanwhile, special attention should be paid to habitat quality and habitat degradation in middle-altitude areas (2400~2950m) to improve regional health as a whole. The research results can provide reference for the precise formulation of environmental protection strategies and future land use spatial planning in Qilian Mountain National Nature Reserve.

Key words： Qilian Mountain National Nature Reserve habitat quality driving mechanism habitat degradation degree geographic detector hotspot analysis

Received: 20 October 2023

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X171.1

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	SU Jun-de
	ZHAO Xiao-jiong
	LI Guo-xia
	GUAN Hai-wen

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SU Jun-de,ZHAO Xiao-jiong,LI Guo-xia等. Spatial and temporal characteristics and driving factors of habitat quality in Qilian Mountain National Nature Reserve[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(5): 2595-2605.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I5/2595

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