水土保持通报2012，Vol.32Issue(6)：286-291,6.
小流域综合治理工程对生态服务价值的影响
Effect of Soil and Water Conservation on Ecosystem Service Value in Small Watersheds
摘要
Abstract
Taken Liangshan County,one of the key demonstration sites in the fifth initiative regarding soil and water conservation in upper Yangtze River as the study area,we analyzed the changes in ecosystem service values of Liangshan County,and developed comprehensive management practices and related models for assessing ecosystem service values in small watersheds,based on the published service values of Chinese terrestrial ecosystems and local grain yield and market price.The results showed that the land use type changed greatly from 1999 to 2003,as the areas of unused and cultivated lands decreased 36 038.67 hm2 and 5 498.50 hm2,and the areas of forest and pasture lands increased 35 614.30 hm2 and 5 889.53 hm2,respectively.Under the scenario that the proposed comprehensive management practices were carried out,the total ecosystem service value could increase from 1.37×109 to 1.85×109 Yuan.Except the value of food production decreased 3.31×105 Yuan,the other ecosystem service functions increased significantly but to various degrees.It was also found that only forest and pasture lands played positive roles in enhancing ecosystem service values,up to 89.4%.Their changes were the major reason for the increase of ecosystem service value.The average prediction accuracy of the principal component analysis(PCA)—radial basis function(RBF) model reached 94.8%,indicating that the model accurately reflected the influences of small watershed management measures on the ecosystem service values.关键词
生态服务价值/主成分分析/径向基函数神经网络/小流域/综合治理Key words
ecosystem service value/principal component analysis(PCA)/radial basis function(RBF) networks/small watershed/comprehensive management分类
管理科学引用本文复制引用
胡淑萍,尹忠东,高国雄..小流域综合治理工程对生态服务价值的影响[J].水土保持通报,2012,32(6):286-291,6.基金项目
国家基础科学（973）重点发展计划项目“西南紫色土区水土流失综合调控原理与治理范式” （）
