Spatiotemporal Evolution and Correlation Analysis of Ecosystem Service Values and Ecological Risk in Xiangjiang River
Based on the land use data interpreted by remote sensing from 1995 to 2020 in Xiangjiang River,this paper studied the temporal and spatial characteristics of ecosystem service value and ecological risk spatiotemporal evolution in Xiangjiang River and their correlation.The results show that:(1)In the past 25 years,the ecosystem service value of Xiangjiang River decreased by 291.977 billion,showing a high value in the north and south and a low value in the middle.The proportion of ecosystem service value of each land use type was:forest land>water area>cultivated land>grassland>wetland>unused land>construction land.(2)From 1995 to 2020,the ecological risk index of Xiangjiang River generally showed a slowly decreasing trend.The construction land had the smallest ecological risk value,and the cultivated land had the largest ecological risk value.The ecological risk level showed a distribution state of overall fragmentation and local aggregation.(3)Ecological risk index shows a positive correlation in spatial distribution,and the spatial agglomeration of land use ecological risk level similar plots shows a decreasing trend.The analysis of the spatial correlation show that the significant correlation areas are mainly distributed in Yueyang,Zhuzhou,Chenzhou and Yongzhou.
ecosystem service valueecological riskcorrelationXiangjiang River
NETL
NSTL
万方数据
