基于土地利用变化的怀柔水库流域生态服务价值研究

Ecosystem services value based on land use change in Huairou reservoir watershed

研究土地利用变化对区域生态系统服务价值的影响具有重要的意义。该文以怀柔水库流域5期土地利用数据为基础,探讨了流域内1990-2008年间土地利用变化及其所引起的生态系统服务价值的变化。结果表明:该流域林地是主要的土地利用类型,林地和水域面积呈逐期增加趋势,农田面积基本保持不变,而未利用地面积逐渐减少;研究期内生态系统服务价值总体呈上升趋势,与1990年相比,1995、2000、2005、和2008年生态服务总价值分别增加0.57%、1.58%、2.46%和2.88%。林地和水域是生态系统服务价值构成中贡献最大的土地类型,占到总生态系统服务价值的80%以上;各单项生态服务价值大小依次为:维持生物多样性>水文调节>气体调节>气候调节>土壤形成与保持>提供美学景观>原材料生产>废物处理和食物生产。

It is of significance to study the effect of land use change on ecosystem service values.Base on five dynamic data of land use in Huairou reservoir watershed,this paper analyzed the land use change and its consequent changes in ecosystem services value in the watershed from 1990 to 2008.The results showed that the main land use in the watershed was forest,and the area of forest and water exhibited an increasing trend.The area of farmland almost remained unchanged,while the area of unused land showed itself as a downtrend.The total ecological services value exhibited an increasing trend,and in 1995,2000,2005 and 2008 which increased by 0.57%,1.58%,2.46% and 2.88%,respectively compared with that in 1990.The forest and water were the land use types that made the greatest contribution to the total ecosystem services value of the study region.The accumulative ecosystem services value of two land use types accounted for over 80% of the total values in the watershed,indicating that those land use categories played important and remarkable roles in ecosystem services.And single ecosystem service value was in order of biodiversity maintenancehydrological adjustmentgas regulationclimate regulationmaintain soilrecreation and cultureraw materials productionwaste treatment and food production.