Impacts Of Land Use Change On Ecosystem Services Value In Wuchuan County Of Inner Mongolia

In this paper,the data of land use in each period were obtained through interpretation of remote sensing images in 2005,2010 and 2015 of wuchuan county,then reference to China terrestrial ecosystem services value,estimated the ecosystem services value in wuchuan county,and combining Contribution rate analysis and correlation analysis to discuss the impacts of land use change on ecosystem services value in Wuchuan county.At last,through grey prediction analysis to predicted the ecosystem service value in wuchuan county in the next 20 years.The results show that:(1)From 2005 to 2015,the land use area of wuchuan county has changed significantly,construction land,woodland gradually increased,grassland,farmland,water area and unused land grandually reduced,particularly,the woodland's annual growth rate and the increased area is the largest,annual growth rate reach to 6.06%,it indicates that forestry ecological engineering is remarkable in the research area.Next is construction land,the annual growth rate is 1.79%,it shows the rapid development of the local economy during this period.Grassland area decreased the most,annual growth rate was-0.74%,but the grassland always occupied the dominant position.During the study period,woodland main was transferred into,mainly from grassland and cultivated land.Grassland and cultivated land main was transferred out,mostly to woodland and construction land.(2)The ecosystem services value sensitivity index of each land use type less than1,indicates that the ecosystem services value of Wuchuan lacks flexibility on its service value index,the results are believable.From 2005 to 2015,Wuchuan total ecosystem services value gradually showed a increasing trend,increased 54.45×10~7 yuan in last 10years.the increase of woodland was the largest,increased 84.86×10~7yuan.farmland,grassland,water area and unused land ecosystem services value decreased,particularly the grassland decreased 17.08×10~7 yuan.In terms of the structure,grassland account for the highest proportion.But in 2015,the proportion of woodland was beyond the grassland.In the ecosystem service type,the proportion of soil formation and protection services is the highest,all above 20%.(3)According to the changing characteristics of ecosystem service value in wuchuan county,it can be seen that:(1)The slope of wuchuan county is divided into five grades:0°-8°,8°-15°,15°-25°,25°-35°and>35°.The results show that the value of ecosystem services decreases with the increase of slope.The ecosystem service value of the grade of 0°-8°slope is the highest and the added value is the most;(2)In addition to shady slope,there is not more difference in the grade of aspects in the ecosystem services value.In each stage,the contribution rate of the shady slope is the highest,sunny slope is relatively small,and the semi-su nny slope and the semi-shady slope are centered.(3)During the study,the ecosystem services value increased in all towns,Halaheshao town is the highest,and Kekegengli is the least town.(4)The relationship between grassland and total ecosystem services value is the highest and unused land is the least.Woodland ecological contribution rate was the highest,73.62%,followed by grassland and cultivated land,the sum of the three is over95%of the total,are the most important contribution factor of ecosystem service value.(5)Through the grey GM(1,1)prediction model to predict the ecosystem service value of wuchuan county from 2020 to 2035,the results show that in the next 20 years,the ecosystem services value in Wuchuan county is still growing,especially in 2035,the forecast value will exceed 700 10~7 yuan.