Research On Change Of Land Use And Ecosystem Service Value In Fuzhou City

Land is the most important resource on the earth’s surface,and ecosystem service is a hot research issue in land science in recent years.In the background of increasing population and advancing urbanization,a series of changes have taken place in land use,and the contradiction between economic development and natural resources has become increasingly prominent.Land provides various services for human production and life and has a profound impact on human survival and development.To explore the inner connection between the land use and the ecosystem services,it can provide theoretical foundation and practical reference for the development of ecological systems and social and economic development in the future.Taking Fuzhou as the research object,this paper takes the data of land use change from 2009 to 2015 as the basic data.From the quantity of land use,the range of change,the dynamic degree and the utilization degree,this paper analyzes the temporal and spatial evolution rules and causes of all kinds of land in Fuzhou for 2009-2015 years.Through the construction of the Fuzhou’s ecosystem service value calculation model and the related research,the time change characteristics and regional variation differences of the ecosystem service value of Fuzhou in the past 2009-2015 years are analyzed.The relationship between land use and ecosystem service value is discussed by using variable contribution rate and correlation analysis.From the perspective of GDP,population and urbanization rate,the relationship between social and economic development and the change of ecosystem service value is discussed.Finally,the grey prediction model GM(1,1)was introduced to analyze the evolution characteristics and future development trend of land use and ecosystem service value in Fuzhou from 2016 to 2020.The main conclusions are as follows:(1)During the period from 2009 to 2015,the land use in Fuzhou has shown the changing characteristics of "three increases and five decreases." Grass,urban village and industrial and mining land and transportation land area is increasing,while the cultivated land,forest land,garden land,water and land for water facilities and other land area presents obvious decreasing trend.The area of cultivated land decreased the most,and the area of urban village and industrial and mining land increased the most.Forest land is the most important type of land in Fuzhou,and its utilization level is also higher than other types of land use.The comprehensive index of land use degree showed an upward trend,indicating that the land use in Fuzhou is still in the development stage.There are also differences in land use in different regions.There are hot spots in different land use types,but the overall difference is not significant.(2)From 2009 to 2015,the total value of ecosystem services in Fuzhou decreased year by year,a total decrease of 1 billion 948 million yuan.In addition to the increase in the ecological value of grassland,the ecosystem service value of the remaining seven types of land have declined to varying degrees.Among Fuzhou’s counties(cities),the value of ecosystem services in Fuqing saw the largest drop.As a whole,the ecosystem service value in the whole city is relatively large,and the service value composition of the ecosystem in different counties(cities)and districts is significantly different from that of the individual ecosystem.Further calculation in Fuzhou in 2009 and 2015,land use type of the sensitivity of the index,the results are less than 1,that Fuzhou’s ecosystem service value coefficient of total amount of the value of the land use type is inelastic,the results of this article is credible,and the index sorting is consistent,the size of the two years of woodland sensitivity index,the largest transportation land minimum sensitivity index.(3)The research shows that the land use change and ecosystem service value of Fuzhou are closely related.The area of agricultural land,such as forestland,arable land,garden land and so on,is reduced.The increase of urban village,industrial and mining land and transportation land area in construction land leads to the decrease of ecosystem service value in Fuzhou.There is a negative correlation between the level of urban economic development,population size and urbanization rate and ecosystem service value.The prediction results of the grey prediction model show that the ecosystem service value of Fuzhou continued to decline from 2016 to 2020.