Spatiotemporal evolution and association analysis of ecosystem service value and ecological risk in Xi'an
With the accelerating process of urbanization,the land use pattern has an important impact on the environment.Using ArcGIS 10.8,Fragatats 4.2,GeoDa 1.20,and Excel 365 software as the support platform,the study studied the correlation between spatial and temporal changes in ecological risk and ecosystem service value in Xi'an in the last 30 years,including 1995,2000,2005,2010,2015,2020,etc.,based on the 1 km×1 km evaluation cell grid as the data source years,the spatial and temporal changes of ecological risk and ecosystem service value correlation in Xi'an were studied based on a 1 km×1 km evaluation cell grid.The results show that:1)In the past 30 years,the land use of cultivated land and grassland mainly flowed to forest land,watershed,and construction land,with forest land being the most abundant,followed by construction land,and then watershed;2)In the past 30 years,the value of ecosystem services in Xi'an fluctuated up and down around 228.11×108 yuan and the ecological value provided,from largest to smallest,was forest land>cultivated land>watershed>grassland>unutilized land>construction land;3)In the past 30 years,the landscape ecological risk of Xi'an has been decreasing and then increasing,and the overall landscape ecological risk value is low,with the maximum ecological risk of 6.63,2.57,1.24,1.48,1.38 and 3.58,respectively,and the high ecological risk areas are concentrated in the intersections of forest land and watershed,grassland and forest land,watershed and cultivated land;4)The value of the ecological services of Xi'an is negatively correlated with the landscape ecological risk,and the negative correlation index is negatively correlated,and the negative correlation index is negatively correlated with the landscape ecological risk of Xi'an.Index were negatively correlated,with negative correlation slopes of-0.142,-0.180,-0.135,-0.246,-0.246,and-0.191,respectively.This study aims to provide references for the rational planning of land use and environmental management in Xi'an.
Land usevalue of ecosystem serviceslandscape ecological risk indexMoran's index
NETL
NSTL
万方数据
