异龙湖流域湿地生态系统健康评价

Health Evaluation of Wetland Ecosystem in Yi-long Lake Basin

湿地生态系统健康状况评价为湿地资源的合理开发、生态系统的维护提供了重要的借鉴。在充分了解异龙湖流域湿地资源环境的基础上,结合湖泊湿地生态系统的概念及内涵,采用PSR(压力-状态-响应)框架模型和生态系统健康指数计算方法对研究区湿地生态系统健康状况进行评价。结果表明:(1)异龙湖流域湿地生态系统健康评价综合分值(Y)为2.8494,处于[2,3]之间,属于脆弱状态;(2)从三大指标状况来看,压力指标(P)、状态指标(S)和响应指标(R)在评价等级中的得分及表现情况分别为0.7368(脆弱状态)、1.1620(亚健康状态)和0.9506(亚健康状态);(3)人口密度、人类活动强度、单位面积化肥和农药负荷、水土流失强度、湖泊水富营养化、人们的环保意识等指标是影响流域内湿地生态系统健康状况的关键因素,人为因素占主导地位。

Evaluation of the health of wetland ecosystem provides an important basis for rational development of wetland resources and maintenance of ecosystem. Based on fully understanding of the existing wetland resources and environment in Yi-long lake basin, according to the concept of wetland ecosystem and its connotation, the PSR （pressure-state-response） framework model and calculation method for ecosystem health index were used to evaluate the health level of wetland ecosystem in Yi-long lake basin in Yunnan Province. The results showed that the wetland ecosystem health evaluation score （Y） was 2.8494, between 2 and 3,indicating that the wetland is in a fragile state, and the Pressure Index （P）, State Index（S） and Response Index among the three major indices were in the sub-health state and fragile state respectively. The evaluation results showed that the level of wetland ecosystem health was in a fragile state, and human activity is the main factor that affects the wetland ecosystem health in Yi-long lake basin.