Assessment of Ecosystem Services Value in Hotan Oasis, Xingjiang  

和田绿洲生态系统服务价值评估(英文)

作　　者：杨依天[1,2,3] 王平[2] 黄宇[1,3] 张月从 郭翠恩[2] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]河北民族师范学院,河北承德067000 [3]中国科学院大学,北京100049

出　　处：《Agricultural Science & Technology》2013年第3期425-432,共8页农业科学与技术（英文版）

基　　金：Supported by the National Basic Research Program of China (973 Program, 2010CB955905)~~

摘　　要：[Objective] The study aimed to assess the ecosystem services value in Hotan Oasis, Xingjiang. [Method] The visual interpretation method was adopted to process TM/ETM＋ images based on field investigation in Hotan Oasis. These inter- pretation data, along with two periods of land use data, were reclassified to farm- land, forest, grassland and so on. Then, the ecosystem services value was calculat- ed and analyzed. [Result] Analysis indicated that the ecosystem services value had been increased by 30.44x108 Yuan （16.51%） in the study area during 1980-2010, which can be explained by the increase of glacier and snowfield distributed in the south mountain with the increase of annual precipitation. At the same time, the con- tribution rate of grassland to ecosystem services value had been decreased as a result of degradation of grassland and occupation from farmland. For the whole basin, the increase of ecosystem services value came from the upper reaches, while the ecosystem services value had been reduced in the middle and lower reaches. In the middle reaches, the reduction came mainly from wetland （-1.83x10s Yuan）, waters （-1.68x10s Yuan）, forest （-0.86x108 Yuan） and grassland （-0.80x108 Yuan）. But in the lower reaches, the ecosystem services values of waters, grassland and forest were -0.61 x108 Yuan, -0.24x108 Yuan, and -0.07x10s Yuan, respectively. [Conclusion] If some effective policies, such as the implementation of returning farm- land to forest and ceasing from farming to grazing, would be taken, the ecosystem degradation can be constrained and reversed in the northwest arid region.[目的]评估和田绿洲的生态系统服务价值。[方法]在目视解译4期20景遥感影像并对2期土地利用数据进行重新归类基础上,计算各类生态系统服务价值。[结果]1980-2010年,研究区生态系统服务总价值增加30.44×108元,增加了16.51%。生态系统服务价值上升的主要原因是其南部山区雪冰面积因年降水量增加而增加。草地对研究区生态系统服务总价值贡献率呈下降趋势,其原因是草地退化及耕地对草地侵占。就流域角度而言,上游区生态系统服务价值增加导致研究区生态服务价值上升。中游区与下游区生态系统服务价值均减少。其中,中游区湿地(-1.83×108元)、水域(-1.68×108元)、森林(-0.86×108元)及草地(-0.80×108元)等服务价值减少是其主要原因;下游区水域(-0.61×108元)、草地(-0.24×108元)及森林面积(-0.07×108元)等生态服务价值减少是其根源。[结论]进一步采取退耕还林(还草)、严禁开荒等政策,西北干旱区森林、草地等生态系统退化趋势是可以遏制和逆转的。

关 键 词：Arid region Ecosystem services value ASSESSMENT Hotan Oasis 

分 类 号：X826[环境科学与工程—环境工程]