中文摘要：

以1993、2000和2006年3个时期的TM/ETM影像为主要数据源,采用最大似然比分类法获得衡阳盆地土地覆盖信息,并基于Costanza的生态服务价值理论,分析了土地覆盖变化驱动下的生态服务价值变化。结果表明：①研究区内林地分布最广,1993―2006年林地和农田呈显著减少趋势,建设用地明显增加,年均增加32.77km2,反映了研究区城镇化速度较快;②生态服务价值组成中,林地所占比重最大,导致研究区水源涵养价值最高;③研究区生态服务价值以水源涵养、气候调节、土壤形成、废物处理和气体调节功能为主,5种功能的价值占到了总价值的84%以上;④土地覆盖变化的生态效应指数比较接近,土地覆盖变化对生态服务价值的变化影响不大。

英文摘要：

Hengyang basin is located in the ecologically vulnerable area in Southern China,Because of the irrational human activities, soil erosion and red desertification are serious in the area. Therefore,it is indispensable for the basin to carry out ecological environment planning. The key step is evaluation of ecosystem service value. In this paper,TM/ETM images of 3 periods including years of 1990,2000 and 2006 were used as main data sources,and classification algorithm of maximum likelihood was used to extract land cover information of Hengyang basin,then the ecosystem service value and its variations were analyzed. The results show that：1）Woodland was the main land cover type in the studied area,the area of woodland and agricultural land decreased significantly,and the construction land area increased obviously, which increased at a rate of 32.77 km2 per year on average.2）Of the components of ecosystem service value,the eco-service value of woodland accounted for the largest proportion, that made the eco-service value of water conservation the largest;3）The eco-service values of water conservation, climate regulation, soil formation, and waste disposal and gas management were the main components,which shared 84% of the whole value;4）Variations of land cover had little effect on the changes of ecosystem service value.