中文摘要：

基于RS/GIS技术,在转移矩阵分析方法的基础上,引入3个转移量化指标,探讨了石羊河流域中下游绿洲生态承载力的时空动态和转移变化规律.结果表明：该区域总生态承载力2012年比2002年增加了1.44%,其中中游凉州区增加了0.04%,下游民勤县增加了3.27%,单位面积生态承载力空间异质性明显.2002-2012年,区域内部以耕地生态承载力向城乡工矿居民用地生态承载力、未利用地生态承载力向其它类型土地生态承载力转移为主;耕地、城乡工矿居民用地生态承载力转入量小于转出量,而其它类型土地的生态承载力转入量大于转出量,凉州区和民勤县生态承载力组成变化与上述类似,表明研究区内部各类生态承载力转移方向和数量是影响其内部组成和时空格局的重要因素.民勤县2002年未利用地转变为其它类型土地后的生态承载力转入量占2012年总生态承载力的13.03%,占总转入量的65.52%,说明民勤县未利用地的转出对全县生态承载力的增加贡献最大,是民勤县空间上单位面积生态承载力低值区变为高值区的主要原因.本研究结论可为流域的生态环境建设、自然资源可持续管理及制定前瞻性的可持续发展规划提供依据.

英文摘要：

On the basis of RS/GIS technology and the transfer matrix methodology three transfer quantization indicators were introduced to discuss the changes in spatio-temporal dynamic transfer of biocapacity in oasis areas of the middle and lower Shiyang River catchment.The results showed that the biocapacity of the study area in 2012 increased by 1.44%compared with 2002,reflecting that the spatial distribution of biocapacity in per unit area was of spatial heterogeneity and presented a trend of fragmentation.The biocapacity in Liangzhou District increased by0.04%and that in Minqin County increased by 3.27%.In both regions,the transfer of biocapacity was dominated by cropland to building-up land and unused land to other land use types between 2002 and 2012.The transfer-in amount of cropland and building-up land＇s biocapacity was less than transfer-out amount,while the transfer-in amount of other land types was higher than the transfer-out amount,the case being similar for both Liangzhou District and Minqin County,indicating that the transfer direction and amount of biocapacity were the most key factors to influence the internal composition and spatio-temporal pattern in the region.In Minqin County,after the transfer of unused land to other land use types in 2002,the transfer-in amount of biocapacity was about 13.03%of the total biocapacity in 2012,accounting for 65.62%of the total transfer-in amount,indicating that the transfer change in unused land not only made the greatest contribution to increasing the biocapacity in Minqin County,but also became a major cause for transforming the region with a low value in spatio-temporal biocapacity in per unit area into a region with a high value in this respect.The results can provide a basis for the basin＇s ecological environment construction and for sustainable management of natural resources,and eventually for making a forward-looking plan for sustainable development in both places.