艾比湖流域生态系统服务价值时空分异特征及其对土地利用/土地覆被的响应

基于遥感与GIS技术,运用中国陆地生态系统服务价值当量表,并结合艾比湖流域景观类型,分析了2001~2009年生态系统服务价值变化,探讨了干旱区内陆湖流域生态系统服务变化对土地利用/覆被变化(LUCC)的响应。结果表明:艾比湖流域土地利用类型变化明显,综合土地利用动态度为6.84,其中从单一动态度得出变化最为明显的是耕地、荒漠、林地的扩大,草地和水体的较少;艾比湖流域生态系统服务价值整体变化不大,研究期间总价值由395.70亿元减少到390.14亿元,原因是草地、水体面积的减少,耕地、灌木和林地面积的增加补偿了总价值的部分损失,但损失大于收益;研究区生态系统服务价值的空间差异明显,2001~2009年生态系统服务价值发生变化最频繁的地区主要位于流域中部荒漠和绿洲交错带,这里荒漠面积扩大,生态系统服务价值明显降低,有向绿洲扩散的趋势。研究结果可为艾比湖流域国家生态保护区土地科学管理、保护与开发提供参考。

Spatio-temporal Variation in the Value of Ecosystem Services and Its Response to LUCC in Ebinur Lake Basin

Based on remote sensing and GIS technology, using China inland eco-system service value as gauge, combined with landscape types of Ebinur watershed, the changes of ecosystem services value during 2001 - 2009 were analyzed, the reaction of the inland lake basin in arid zone ecosystem services change on land use/cover change（LUCC） was discussed. The results showed that： the change of land use type is obvious in Ebinur watershed, and the integrated land use dynamic degree is 6.84, among which the most obvious change is plowland, desert, forest land from a single dynamic, but the grassland and water change slightly. The entirety change is not so much in ecosystem services value in Ebinur watershed, and the total value changes from 39.57 billion yuan to 39. 014 billion yuan during the research period, and the result is that the grassland and water area is declining, but the increasing of plowland , brush and forest land makes up the partial lose of total value ; The spatial difference of ecosystem service value is remarkable in the research area, and the ecosystem service value change most frequently area is located in the desert of the middle part of the watershed and the oasis ecotone, in which the area of desert is keeping expanding, and the ecosystem service value declines so obvious, meanwhile this trend is spreading to oasis. The achievement of the study provide the basis for national ecological reserve land science management, protection and development.