喀斯特区土地利用变化对生态系统服务价值的影响--以广西环江县为例

Influence of Karst emigration region land use change on ecosystem service value—using Guangxi Huanjiang County as example

为研究喀斯特区域土地利用变化对生态系统服务功能的影响,参照中国陆地生态系统单位服务价值系数,根据土地利用变化对广西环江县的生态系统服务价值进行了估算.结果表明,1988～1999年,研究区的生态系统服务价值增加了3.58×10^8元,增幅为6.45%,大量未利用地转化为生态价值系数较高的耕地、草地是其增加的主要原因.单项服务功能中,食物生产价值增幅最大,原材料价值减少.敏感性分析表明,生态系统服务价值对价值系数缺乏弹性,研究结果可信.由于该区处于生存型经济发展阶段,开发中应采取积极的生态环境保护措施,并提高土地集约利用度,实现区域生态系统持续向健康型发展.

In order to study the influence of Karst region land use change on ecosystem service function, referring to Chinese land ecosystem unit of service value coefficient and based on the land use change, the ecosystem service value of Guangxi Huanjiang County was estimated, In 1988-1999 years, the ecosystem service value increased 3.58×10^8 yuan, with increasing range of 6.45%, Large amount of not used land transformed to cultivated land and grass land with higher ecological value coefficient was the main cause of its increasing. In the individual event service function, the increased range of food production value was the greatest, while the raw materials value decreased, The sensitivity analysis showed that the ecosystem service value lacked elasticity on value coefficient, the results was credible. Owing to this region was on living type economic developing stage, eco-environment protection measures should be adopted in development, and enhanced the land use intensity in order to realizing the regional ecosystem developing continuously towards health.