摘要
生态系统服务的价值评估研究是可持续发展评估研究的关键内容和焦点。在遥感和GIS技术支持下,本文分析了2000-2008年石羊河流域各市县土地利用及其变化。在此基础上,参考Costanza生态系统服务价值计算方法和中国陆地生态系统单位面积服务价值表,分析近10年来研究区土地利用变化对生态系统服务价值的影响及其变化情况。结果表明:在2000-2008年间,石羊河流域土地利用变化以耕地、未利用地和草地为主,主要体现在流域中下游地区。总趋势为林地、草地和未利用地的面积减少,耕地和建筑用地的面积显著增加。这一变化直接影响到生态服务价值的变化。就单位面积的生态服务价值而言,各市县差异非常明显,整个流域存在明显的自上而下的空间梯度分异。近10年间,流域中下游地区生态服务价值均呈现增加趋势,而上游山区呈较少趋势。这表明中下游地区受到强烈的外界干预,区内环境正朝着有利于生态环境恢复的方向转变,而上游山区生态环境则呈现有所恶化的趋势。
The valuation of ecosystem services has become one of the key elements and the focuses of sustainable development.With the aid of RS and GIS technique,land use changes of all cities and counties along Shiyang River during the years from 2000 to 2008 were analyzed.On this basis,according to method of calculating the value of ecosystem services by Costanza and the Chinese terrestrial ecosystem service value per unit area tables,the effects of land-use change on ecosystem service value and the change of ecosystem services value in the study area for nearly 10 years were analyzed.The results showed that from 2000 to 2008,the Shiyang River land use change was mainly reflected in farmland,unused land and grassland,and mainly occurred in the middle and lower reaches of Shiyang River.The general tendency was that the area of woodland,grassland and unused land was decreasing,while the area of the farmland and the construction land significantly increased.The change had a direct impact on the eco-changes in service value.As for ecosystem service value per unit area,there were obvious differences in each city and county,which had significantly spatial gradient difference of ecosystem service value per unit area among the upper,middle and lower reaches in the whole basin.Over the past 10 years,ecosystem services value in the middle and lower reaches was increasing,and had a decreasing trend in the upper mountain reaches.It indicated that there was a recovery shift of the ecological environment in the middle and lower reaches,due to a strong external interference.There was a deterioration trend in the mountainous area of the upper reaches of the river.
出处
《中国人口·资源与环境》
CSSCI
北大核心
2010年第6期68-73,共6页
China Population,Resources and Environment
基金
国家自然科学基金(No.40671051)资助
关键词
土地利用变化
生态服务价值
空间梯度分异
石羊河流域
land use changes
ecosystem service value
spatial differentiation
Shiyang River Basin
作者简介
蒋小荣，硕士生，主要研究方向为生态经济学与区域可持续发展。
