中文摘要：

草原生态安全评价是根据一定社会发展阶段草原自然环境压力和人类需求与影响,对草原生态安全状况等级的评定。以生态环境的驱动力-状态-响应概念（PSR）模型为指导,构建由21个具体指标组成的多层次指标体系,采用模糊评价方法对天祝高寒草原生态安全状况进行评价。在GIS软件支持下,利用天祝高寒草原地区地图数据、遥感数据、观测数据和统计数据,采用信息图谱方法生成天祝高寒草原水热和土地条件图谱、以乡镇为指标分级分类单元的评价指标图谱和基于模糊评价模型的安全评价结果图谱。研究表明：天祝高寒草原生态安全状况总体上处于比较安全的状态,但是处于较不安全和不安全状态的区域面积已接近总面积的1/4,草原生态安全问题应引起高度关注;区内生态安全状态具有明显的地域分异特征,可划分为西北部草原生态安全保护区、东部草原生态较安全保护与治理区和中部草原生态安全治理区3个区域。

英文摘要：

Evaluation of rangeland ecological security is the assessment of ecological security levels,according to rangeland natural environment pressure and the needs of human in special stage of social development.Index systems and methods of evaluation are the important study contents in the evaluation of rangeland ecological security.With direction of driving force-state-response（DSR）,we built the multilevel index systems which are composed of 21 specific indexes,and evaluated the rangeland ecological security of Tianzhu alpine rangeland with fuzzy evaluation model.Supported by GIS software,used map data,remote sensing data,observational data and statistical data of Tianzhu alpine rangeland,applied with information mapping method,we generated condition maps of water-heat and land,evaluation index maps according to classification unit of township index and security evaluation result maps based on fuzzy evaluation model of Tianzhu alpine rangeland.The results indicated that Tianzhu alpine rangeland ecological security condition is in relatively safe state as a whole,but the area in relatively unsafe and unsafe state approach 1/4 of total area.The problems of rangeland ecological security should be paid more attention.Rangeland ecological security condition in the study area showed obvious spatial variation.The study area can be divided into 3 areas： northwestern rangeland ecological security protect region,eastern rangeland ecological relative security protect and control region,midland rangeland ecological security control region.