坝上沽源县土地利用变化对生态系统服务价值的影响

Effects of land use change on values of ecosystem services of Guyuan County

分析土地利用变化数据,采用中国陆地生态系统的服务价值测算方法,评估了沽源县土地利用变化引起的生态系统服务价值的变化。结果表明：1990-2006年沽源县耕地面积大幅度减少,牧草地面积稍有减少,林地面积大幅度增加,园地面积没有变化,其余类型面积稍有增加;其中耕地面积减少了73 508.2 hm^2,林地面积增加了73 975.5 hm^2,这主要是退耕还林草的结果;1990-2006年生态系统服务价值增加了30 550.9万元,其中林地和牧草地对生态系统服务价值的贡献最大。

As a typical area of farming-pastoral,in recent years due to the implementation of returning cultivated land to forestland or grassland,there were severe variations in land use in Guyuan County.Studies on the variation state of its ecosystem service value could supply scientific basis for protection and restoration for regional eco-environment.With referring to the table of Chinese land ecosystem services value of unit area and analyzing the data of land use change in Guyuan County,changes of the values of ecosystem services caused by land use change were estimated.The results showed that,there was some decrease in the cultivated land and grassland,but no change in the garden area and increase in area of other categories in Guyuan County from 1990～ 2006,in which the area of cultivated land decreased by 73 508.2 hm^2 while the area of forest increased by 73 975.5 hm^2,mainly resulted from the implementation of returning cultivated land to forestland.Values of Guyuan County＇s ecosystem services increased by 305 509 million Yuan RMB,in which the ecosystem services of forestland and grassland have the greatest contribution.