红壤丘陵区土地利用变化对生态系统服务功能的影响以长沙市为例

Effects of Land Use Change on the Ecosystem Service Function in Red Soil Hilly Region——a Case Study of Changsha City

在地理信息系统的支持下，应用Costanza提出的生态服务价值计算方法，参照中国陆地生态系统单位服务价值系数，研究分析了红壤丘陵典型区域长沙市土地利用变化对生态系统服务功能的影响．结果表明，1996～2004年长沙市的生态系统服务价值净损失6．016×10^7元，大面积的林地、耕地转化为生态价值系数较低的建设用地是其减少的主要原因．生态系统单项服务功能价值均呈下降趋势，其中土壤形成和保护、水源涵养、废物处理、气候调节价值减幅较大．由于该区生态服务价值呈下降趋势，需采取积极的生态保护措施，以维护区域生态系统的服务功能．

With the support of geographical information system （GIS）, the Costanza method and reference to the table of Chinese land ecosystem service value of unit area, this study analyzed the effects of land use change on the ecological service value in Changsha city. The results showed that the value of eco-system services decreased 6.016 × 10^7 yuan （RMB） from 1996 to 2004. The main reason why the values of ecosystem services decreased to a considerable extent was the large-scale transformation from cultivated land and forest land to construction land, which led to the decrease of the ecosystem service value of unit areas. Further analysis showed that there were significant changes in ecological functions, such as soil formation and conservation, water conservation, waste treatment, as well as climate regulation, which had decreased effects. Under the decreasing tendency of ecosystem service function values in Changsha city, ecological environment protection measures should be adopted to maintain regional healthy and stable ecosystem.