Evaluation Of Ecosystem Services Value In Huzhou City Based On Land Use Change

Land use changes will lead to changes in the structural state of the ecosystem.This study analyzed the land use change in Huzhou City,adjusted the ecosystem service value equivalent factor based on the actual situation in Huzhou,and used the ecosystem service value model to calculate the ecosystem service value in Huzhou.Analyzed the spatial and temporal distribution of ecosystem service value,the relationship between land use and ecosystem service values.Those are of great significance to the socio-economic development of the region and the improvement of the ecological environment.The main conclusions are as follows:1)Analyzed the land use change of Huzhou in 2005,2010,2015 and 2018,and found that the land use change of Huzhou was relatively gentle.Among the various types of land use,cultivated land accounts for the largest area,followed by forest land,and unused land accounts for the smallest area.Over the years,the urban and rural industrial and mining residential land and waters have been increasing year by year,the cultivated land and unused land have been decreasing,the overall forest land has been decreasing,and the grassland has been increasing.Urban and rural industrial and mining residential land has increased by 82.69% in 14 years,and over time,the conversion speed between various types of land use has accelerated,especially into urban and rural industrial and mining residential land,which indicates that the urbanization process of Huzhou is extremely fast.2)Based on the existing research and the actual situation of Huzhou City,the table of Huzhou Ecosystem Service Value Equivalent Factors was revised.After analyzing the changes in the value of ecosystem services in Huzhou City before and after the amendment,it was found that,regardless of before and after the amendment,the ecosystem services value of forest land was the highest and the proportion was large.For residential land,the service value of urban and rural industrial and mining residential land is negative.Before and after the correction of the equivalent factor,the value of unused land did not exceed 300,000 yuan each year,indicating that the contribution rate of unused land to the entire ecosystem was extremely low.From the perspective of ecosystem service functions,the value of various service functions from high to low is soil formation and protection function,water conservation function,gas regulation function,biodiversity protection function,climate regulation function,waste treatment function,and raw material function,entertainment and cultural functions,food production functions.From the perspective of spatial distribution,the high-value areas of ecosystem services in Huzhou are mainly distributed near the waters in the east of Huzhou.The area is mostly surrounded by forest land,while the low-value areas are located in towns and their surrounding areas.With the expansion of towns,the low-value areas of ecosystem services are also expanding.The reduction of land use types with high contribution rate of ecological service value is an important factor for the decrease of ecosystem service value.On the whole,the spatial changes of ecosystem service values are very similar to the spatial changes of land use types.