中文摘要：

基于生态足迹理论，利用地理信息系统的空间分析技术，从图斑和各支流汇水区2种不同空间尺度，分别对1985，2000，2009年石羊河流域上游山区生态承载力进行定量计算，并对其空间格局进行分析．结果表明：时间尺度上，24年间石羊河流域上游山区生态承载力总量呈缓慢增加趋势，人均生态承载力呈明显下降趋势，而各类土地生态承载力呈不同的变化趋势．其中，2000年以后林地、草地和耕地生态承载力变化较为突出，表明中国1999年后实施的退耕还林（草）生态工程对其变化具有积极的推动作用；空间尺度上，石羊河流域上游山区生态承载力供给极不均匀，具有与流域地貌特征、环境禀赋和土地利用／覆被及其变化相关联的地理特性和明显的空间异质性．研究结论可为地方政府因地制宜地制定本区域生态环境保护措施提供科学依据．研究实践表明应用GIS技术计算生态承载力具有较好的应用价值．

英文摘要：

Based on the ecological footprint methodology and GIS spatial analysis technology, bio-capacity was quantitatively calculated and spatial-temporal patterns analysed with patch and sub-catchment 2 different spatial scales in 1985, 2000, 2009 respectively, in the mountain area of the upper Shiyang River catchment. All the results showed that within the time scale, the bio-capacity of the upper Shiyang River catchment showed a slight upward trend and the per capita bio-capacity had an obviously downward trend, but different land use type showed various trends of change. After 2000, the bio-capacity of forest, grass land and farm land changed more obvious, largely due to the implementation of the ＂grain for green＂ project after 1999. In the spatial scales, bio-capacity supplement was unbalanced, exhibiting the associated geographical features （eg. geomorphic, envi- ronment condition, land use and vegetation） and apparent spatial heterogeneity. The research results can provide a scientific basis for the government to take adjusting measurements to preserve the ecological environment. In this kind of practical research, GIS can used as a good technology to investigate the bio-capacity.