甘南藏族自治州土地利用变化的生态系统服务价值响应

Responses of Ecosystem Service Value to Land Use Change in Gannan Tibetan Autonomous Prefecture

参考谢高地等提出的生态系统服务价值系数,分析了甘南藏族自治州1997～2012年土地利用变化及其生态系统服务价值响应.结果表明,1997～2012年甘南州土地利用变化较为显著,以林地面积持续增加,耕地面积和牧草地面积持续减少,水域面积先减少后增加为特点;所产生的生态系统服务价值响应表现为1997～2007年总价值持续减少,2007～2012年总价值呈增长态势,表明近年来甘南州生态环境状况正向良性发展.

Referring to ecosystem service value coefficient proposed by Xie Gaodi,the responses of ecosystem service value to land use change in Gannan Tibetan autonomous prefecture from 1997 to 2012 were analyzed.The results show that during 1997-2012,land use in Gannan was changed significantly,the area of forest land increased,cultivated land and grassland decreased.The water area first decreased then increased.The ecosystem services value decreased from 1997 to 2007,but increased from 2007 to 2012,indicating that the ecological environment of Gannan developed towards favorable status.