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. COD_Mn, 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.