Temporal and spatial variation of ecosystem service value in Shanyin County based on remote sensing assessment
Dynamic assessment of ecological service value of mineral resource-based cities with fragile ecological environment is of great significance for ecological environment protection,economic construction and ecological restoration in mining areas.Taking Shanyin County as an example,a remote sensing assessment system for ecological service value was established to quantitatively calculate the value of ecological service and analyze the temporal and spatial change characteristics of the value of ecological service by selecting data such as vegetation cover,net primary productivity of vegetation,land use,soil,meteorology and statistical data.The results showed that the value of ecological services in Shanyin County showed a fluctuating upward trend of"increase-decrease-increase"from 2005 to 2020,and the value of ecological services increased by 4.34×108 yuan in 16 years.In the value composition of ecological services,the value of maintaining atmospheric balance accounted for the largest proportion,and the value of nutrient circulation accounted for the smallest proportion.The spatial distribution of ecological service value in Shanyin County presented the characteristics of"low-high-low-high"from north to south.The branch of Hengshan Mountain in the south and Hongtao Mountain in the north were the high-value concentrated areas of ecological service value,while the low-value areas were mainly distributed in the area of North Zhouzhuang Town-Daiyue Town-Anrong Township.From 2005 to 2020,the ecological service value per unit area of all land types increased significantly,and the forest land had the highest ecological service value per unit area,with an average of 10 657.36 yuan/hm2,followed by grassland,and the rest were cultivated land,unused land,water area and construction land.This method can realize the dynamic assessment of the value of ecological services,and provide a certain basis for the optimization of ecological structure and the implementation of ecological restoration in this region.
Ecological service valueremote sensing quantitative assessmentdynamic changesShanyin County
NETL
NSTL
万方数据
