水生态学杂志Issue(3)：38-43,6.DOI:10.15928/j.1674-3075.2015.03.006
基于 PSR模型的鸣翠湖湿地生态系统健康评价
Health Assessment of the Mingcui Lake Wetland Ecosystem Based on PSR Modeling
摘要
Abstract
Yinchuan City is located in the arid and semi-arid regions of northwest China .The rich wetland re-sources in this city play an important role in regulating water quality , improving the local microclimate , supporting regional sustainable development and promoting the city grade .Mingcui Lake National Wetland Park is a national AAAA scenic area 9 km away from the urban center of Yinchuan City and it is suffering from the serious eco-envi-ronmental problems of water degradation and loss of biodiversity .A health assessment of the Mingcui Lake ecosys-tem would support a more scientifically based conservation plan for the wetland system .Based on the Pressure-State-Response ( PSR ) conceptual model , we constructed a health assessment index system of the Mingcui Lake wetland , consisting of 27 indicators grouped as a pressure subsystem , a state subsystem and a response subsystem . Water quality data were obtained from monitoring data collected by the Hydrographic Office of Yinchuan City and the Environmental Protection Department of Ningxia Hui Autonomous Region .Ecological data were obtained by in-terpreting remote sensing imagery and statistics maintained by the wetland management office .Socio-economic data were obtained mainly from the Ningxia Statistical Yearbook 2013 and government work reports .The index weighting for each of the 27 indicators was determined by the method of Analytic Hierarchy Process ( AHP) .A five-level eco-system health ranking and the corresponding criteria were proposed based on foreign and domestic research on wet -land ecosystem health and the actual condition of this area .Finally, the comprehensive health assessment index for the Mingcui Lake ecosystem was calculated using the fuzzy comprehensive assessment model and the health level of Mingcui Lake wetland ecosystem was determined based on the comprehensive assessment index .Generally, the Mingcui Lake wetland ecosystem was in sub-health status with an ecosystem health index of 0.6163.The maximum membership degrees of the state index , pressure index and response index were 0.2333, 0.2677 and 0.4553, indi-cating , respectively , sub-health status , health status and sub-health status .The unvaried landscape , excessive us-age of chemical fertilizer , water pollution and high drought index were the main negative factors identified in the Mingcui Lake ecosystem .However , we should not focus only on addressing the negative factors to protect the Ming-cui Lake wetland ecosystem , but also take a comprehensive view of the correlations and interactions between the many factors affecting the wetland .关键词
压力-状态-响应模型/模糊综合评判模型/健康评价/鸣翠湖Key words
PSR model/fuzzy comprehensive evaluation model/health assessment/Mingcui Lake分类
资源环境引用本文复制引用
杨丽芳,钟艳霞,李小宇..基于 PSR模型的鸣翠湖湿地生态系统健康评价[J].水生态学杂志,2015,(3):38-43,6.基金项目
国家自然科学基金项目（41161092）。 （）
