The spatial and temporal changes of habitat quality in the Weihe Basin were explored from 2000 to 2020 based on the integrated valuation of ecosystem service and tradeoff model and ArcGIS software,and the topographic gradient effect of habitat quality analyzed using the topographic distribu-tion index.The results showed that the land use changes in the study area during the two decades mainly included the transfer of cropland to built-up land and grassland,and grassland to cropland and forest land.The transfer between different types was the main factor affecting local habitat quality changes;the spa-tial distribution of habitat quality was dominated by medium habitats,accounting for about 57％,which was mainly distributed in the periphery and northwest of the Guanzhong urban agglomeration in the study area.The smallest proportion was about 5％for lower habitats,but their area increased the fastest,i.e.by 105.80％,due to the large expansion of the agglomeration;the spatial distribution of habitat quality had some positive correlation and the degree of aggregation increased by 1.15％;the local autocorrelation types were dominated by high-high and low-low concentrations,with a high-high aggregation distributed in the Loess Plateau in the northeastern part of the study area and the northern slopes of the Qinling Mountains in the south,and low-low aggregation distributed in the Guanzhong urban agglomeration;the habitat quality in 2020 had a significant topographic gradient effect,which was manifested in that the habitat quality level increased with the increase in the topographic gradient level.
integrated valuation of ecosystem service and tradeoff modelhabitat qualityspatial autocor-relation analysistopographic position indexWeihe Basin
维普
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