基于NDVI修正系数的和田绿洲生态系统服务价值估算  

An Assessment of Ecosystem Service Value Based on NDVI Correction Coefficient in Hotan Oasis

作　　者：杨依天[1] 张月丛[1] 

机构地区：[1]河北民族师范学院,河北承德067000

出　　处：《河北民族师范学院学报》2016年第1期108-117,共10页Journal of Hebei Normal University For Nationalities

基　　金：2013年度河北民族师范学院课题"气候变化情境下的和田绿洲时空演变规律"(201304)

摘　　要：生态系统服务价值的定量评估可为自然资源合理利用及生态保护提供科学依据。和田绿洲生态与环境极为脆弱,在气候变暖大背景下,西部大开发及2009年以来实施的19省市对口援疆建设将对当地资源与环境保护产生巨大压力。为此,目视解译3期18景遥感影像,整理1期土地利用数据,并基于NDVI修正系数对和田绿洲的生态系统服务价值进行估算。结果表明：（1）1980-2010年,和田绿洲生态系统服务总价值增加30.44×10~8元,其增加主要源于南部山区雪冰面积在研究的时间节点上因降水量增加而增加。（2）草地对生态系统服务总价值贡献率呈下降趋势,其下降的主要原因是草地退化及耕地对草地侵占。（3）流域而言,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（-1.83×10~8元）、水域（-1.68×10~8元）、森林（-0.86×10~8元）及草地（-0.80×10~8元）等服务价值减少是其主要原因;下游区水域（-0.61×10~8元）、草地（-0.24×10~8元）及森林面积（-0.07×10~8元）等生态服务价值减少是其生态系统服务价值减少的根源。Assessing ecosystem service value （ESV） is the precondition to provide scientific basis for effective ecosystem protection and rational resources use. Based on NDVI correction coefficient, ＂Xies＇ method＂ was used to assess ESV in Hotan Oasis. Analysis indicates that the ecosystem services value has been increased by 30.44× 108 Yuan （16.51%） in study area during 1980-2010, which can be explained by the increase of glacier and snowfield distributed in the south mountain along with the increase of annual precipitation. Meanwhile, the contribution rate of grassland to ecosystem services value has been decreased as a result of degradation of grassland and occupation from farmland. For the whole basin, the increase of ecosystem services value comes from the upper reaches, while the ecosystem services value has been reduced in the middle and lower reaches. In the middle reaches, the reduction comes mainly from wetland （-1.83× 108 Yuan）, waters （-1.68× 108 Yuan）, forest （-0.86× 108 Yuan） and grassland （-0.80× 108 Yuan） decline. But in the lower reaches, the ecosystem services values of waters, grassland and forest are -0.61 × 108 Yuan, -0.24× 108 Yuan, and -0.07 ×108 Yuan respectively. If some effective policies such as the implementation of returning farmland to forest and ceasing from fanning to grazing are taken, the ecosystem degradation can be constrained and reversed in the northwest arid region.

关 键 词：干旱区 生态系统服务价值 估算 和田绿洲 

分 类 号：F062.2[经济管理—政治经济学]