Research On The Response Of Ecosystemservice Value To Land Use Change

With the development of society,people have to face the ecological and environmental problems brought by the development process while enjoying the convenience brought by the rapid economic development.Land resources are not only closely related to human life,but changes in their use patterns will also directly affect the supply of ecosystem service functions corresponding to the land type,such as climate regulation function,environmental purification function,etc.Therefore,exploring the response of ecosystem service value to land use changes is of great significance to regional economic-environmentally friendly development.This thesis takes the core area of Huaihai economic zone as the research area,through the four phases of Landsat remote sensing image data of 2005,2010,2015 and2020,obtain the four phases of land use data and analyze its temporal and spatial changes;using the equivalent factor method to modify the coefficients,analyze the response of ecosystem service value to land use changes from two scales of time and space,and finally use the gray prediction model to predict the change of land use and ecosystem service value in the core area of Huaihai economic zone in 2025.The conclusions of this thesis were as followed:(1)From 2005 to 2020,the area of each land use types in the core area of Huaihai economic zone has changed significantly.Specifically,the area of grassland,arable land,water area and woodland has decreased,The area of unused land has little change,and the area of construction land has increased more.The land use structure has always maintained cultivated land>construction land>water area>grassland>woodland>unused land.From the time scale the overall land use degree of the core area of Huaihai economic zone has not changed much,but from the spatial scale,the degree of land use varies greatly from city to city.At the same time all type of land use have different degrees of transfer,and the most frequent transfers are cultivated land and construction land.(2)From 2005 to 2020,the ecosystem service value of the core area of Huaihai economic zone has decreased by18311.98×10~6yuan.From the perspective of the ecological value of each land type,the land type with the highest proportion is water area,which has reached more than 80%.Except for the increase in the value of the ecosystem services of the unused land,the rest of the land types all have a decreasing trend.The hydrological regulation function is the function that accounts for the largest proportion of the value of each individual ecosystem service.In the value of each individual ecosystem service,there is a decreasing trend.Among them,the most declining is the water supply function.From the spatial scale,the value of ecosystem services in each city has increased and decreased,and the unit area and per capita value of ecosystem services in each city are quite different,the overall feature is high in the north and low in the south(3)From2005 to 2020,the ecological contribution rate of construction land and water area to ecosystem service value is relatively high.Combined with correlation analysis,it can be found that cultivated land,water area and construction land are important land types that affect ecosystem service value.It is predicted by the gray model that the value of ecosystem services will be further reduced in the next stage.