辽河保护区七星湿地生态系统健康评价

以辽河保护区七星湿地为研究对象，采用主成分分析法与相关性分析法筛选湿地生态系统健康评价指标，构建了由化学需氧量（COD_Mn）、总磷（TP）浓度、氨氮（NH₃-N）浓度、叶绿素a（Chl-a）浓度、溶解氧（DO）浓度5个指标构成的湿地生态系统健康综合评价指标体系，以表征湿地生态系统的水环境质量、水生生物和栖息地环境质量特征；运用综合指数法对七星湿地生态系统健康状况进行评价。结果表明：七星湿地13个采样点中，6个为亚健康等级，6个为一般病态等级，1个为疾病等级；七星湿地总体生态系统健康状况为亚健康等级。

Ecosystem Health Assessment of Qixing Wetland in Liaohe River Conservation Area

With Qixing wetland of Liaohe River Conservation Area as the selected cases，the principal component analysis (PCA) and the correlation analysis were adopted to screen the wetland ecosystem health assessment indicators, and the comprehensive assessment indicator groups consisting of five parameters, i.e. CODMn, TP, NH3-N, Chl-a, DO, were constructed which could reveal the characteristics of water environment quality, aquatic life and habitat environment quality of the wetland ecosystem. The comprehensive index method was used to evaluate the health status of Qixing wetland ecosystem, and it is shown that among the 13 sampling positions of Qixing wetland, six sampling positions are evaluated at the sub-healthy level, six sampling positions are at the generally morbid level and one sampling position is at the morbid level. The overall ecosystem health level of Qixing wetland is sub-healthy level.