Spatiotemporal differentiation and spatial autocorrelation analysis of landscape ecological risk in the Chishui River Basin(Guizhou section)
[Objective]This research aims to explore the spatiotemporal evolution of landscape ecological risk in the Chishui River Basin and clarify the spatial autocorrelation characteristics,providing theoretical references to improve the risk prevention and control capacity of the basin and promote regional sustainable development.[Methods]The spatiotemporal evolution characteristics of landscape ecological risk in the Chishui River Basin(Guizhou section)over the past 20 years were analyzed by constructing a landscape ecological risk assessment model,calculating landscape pattern index,and analyzing spatial autocorrelation characteristics of landscape ecological risk from both global and local aspects.[Results](1)Forest,farmland,and grassland were the main landscape types in the study area,and the sum of the three accounted for more than 95%.(2)From 2000 to 2020,the proportion of medium-risk areas remained above 50%,the area of high-risk and medium-high risk decreased by 375.88 km2,and the area of medium-low risk increased by 413.96 km2.The change in landscape ecological risk level decreased overall.(3)The'high-high'cluster was mainly distributed along the Chishui River Basin,with a west-to-east shift in Xishui County and a south-to-north shift in Renhuai City.The'low-low'cluster was mainly distributed in the northeastern part of the basin.[Conclusion]The risk level of the Chishui River Basin(Guizhou section)shows an overall downward trend.Monitoring of medium-risk areas should be strengthened to prevent the transition from medium risk to high risk.Efforts should be made to enhance ecological protection in the Chishui River Basin and alleviate the tension between economic development and ecological protection.
landscape ecological risklandscape pattern indexspatial autocorrelationspatiotemporal evolutionChishui River Basin
国家科技期刊平台
NSTL
万方数据
维普
