青海湖北部湿地生态健康评估

Assessment of Wetland’s Ecosystem Health in the Northern Qinghai Lake

以青海湖北部湿地为例,从生态系统健康的内涵出发,构建由组成结构、整体功能和外部环境3个要素15个指标组成的生态健康评价指标体系,借鉴生态系统医学理论划分健康等级及评分范围,并在此基础上采用熵权法,AHP法两种方法确定指标权重,计算近10年的生态健康指数,进而对青海湖北部湿地进行了生态健康趋势分析,结果表明其生态健康近10年处于上升状态.对青海湖北部湿地进行生态健康趋势分析,可为青海湖生态研究提供参考依据,为流域的规划管理和保护及其综合治理提供决策依据.

Ecosystem health assessment is one of the hot issues in current environmental science and ecological research,and wetland’s ecosystem health assessment is an important development direction.The assessment takes the northern wetland of the Qinghai-lake as an example,from the conception of the ecosystem health to establish index system which includes 3 elements： wetland organization structure,the whole function and the exterior environment. It has 15 indexes totally. Drawing on medical theories into the ecosystem level,5 class evaluation grades and scoring range are established. It uses entropy weight method and AHP method to determine the index weight. Then calculate the ecosystem health indicators in the past 10 years. To analysis the ecosystem health trend of the northern wetland. Results show that the ecosystem health of northern wetlands in the rising status in recent 10 years.It also provides reference for the study of ecological functions and ecological compensation based on the ecosystem health of the trend analysis. Finally,the research provides decision-making basis for the river basin planning,management,protection and comprehensive management