基于PSR模型的闽东滨海湿地生态系统健康评价

Ecological Health Assessment of Coastal Wetlands Based on PSR Model in Eastern Fujian

闽东滨海湿地是我国湿地重要的组成部分,以闽东滨海湿地为研究对象,基于压力-状态-响应(PSR)模型,在压力系统、状态系统、响应系统3个层面共选取了17个指标,构建了闽东滨海湿地生态系统健康评价指标体系,并运用层次分析法(AHP)确定各项指标的权重,通过综合评价指数(CEI)对闽东滨海湿地生态系统健康进行评价。结果表明:闽东湿地生态系统健康评价值为0.3770,处于亚健康状态。其中,压力系统的健康指数为0.4138,状态系统的健康指数为0.3597,响应系统的健康指数为0.3889。主要表现在闽东滨海湿地的水质等级、土壤性状差、优势植物覆盖率低;并且由于人类活动与湿地自然资源环境之间的矛盾日益加剧,出现了生物多样性下降、湿地功能减弱、水质污染严重、生态环境退化等一系列问题,闽东湿地的保护与管理刻不容缓。

The coastal wetland in eastern Fujian is an important part of the wetlands in China.The coastal wetlands in eastern Fujian were investigated.Based on the pressure-state-response(PSR)model,we developed a indicators system for the assessment of the health of the coastal wetland ecosystems in eastern Fujian,using a total of 17 indicators at 3 levels of pressure system,state system and response system.The AHP was used to determine the weight of each indicator,and the comprehensive evaluation index(CEI)was calculated to rank the status of health of the coastal wetland ecosystems.The CEI of the wetland ecosystems in East Fujian was 0.3770,indicating a state of sub-healthy.The health index of the systems of stress,state and response were respectively 0.4138,0.3597 and 0.3889,reflecting a poor water quality,poor soil properties and a low vegetation coverage of dominant plants;and the increasing conflict between human activities and the natural resources and environment of the wetlands have led to declining of biodiversity,weakening of wetland functions,increasing water pollution and degradation of the environment.Immediate measures need to be taken to strengthen the protection and management of the wetlands in East Fujian.