基于PSR模型的湖北湿地生态系统健康评价研究

Study of the Ecosystem Health Evaluation of the Wetlands in Hubei Province Based on the PSR Model

在充分了解湖北省现有湿地资源状况的基础上,结合湿地生态系统健康的概念和内涵,运用PSR(压力-状态-响应)模型和生态系统健康指数计算相结合的方法对湖北湿地生态系统健康状况进行评价,结果表明:(1)湖北湿地生态系统健康评价综合分值(Y)为2.9867,位于湿地生态系统健康状况评价标准[2,3]之间,处于脆弱状态;(2)评价指标体系中的压力指标和状态指标综合分值(Y)分别为1.3123和1.0462,属于脆弱状态和亚健康状态;(3)人类活动强度、化肥、农药利用强度、湿地递减率、水质状况、植被覆盖、河流补给状况以及管理水平等指标是影响湖北湿地生态系统健康的主要因素。

In this paper, based on the full understanding of the existing wetland resources in Hubei Province, by combination of the concept and connotation of wetland ecosystem health, PSR（pressure-state-response） model was integrated into the ecosystem health index calculation for evaluation of the ecosystem health level of the wetlands in Hubei Province. The results showed that the comprehensive score（Y） of the wetland ecosystem health evaluation was 2.9867 between level 2 and level 3 of the wetland ecosystem health evaluation standard, indicating that it was in a fragile state. The comprehensive score（Y） of the pressure index and state index of the evaluation indicator system was 1.3123 and 1.0462 in a fragile state and sub-health state respectively. The study results also showed that the indictors such as intensity of human activities, utilization intensity of chemical fertilizer and pesticide, wetland decline rate, water quality, vegetation coverage, river supply conditions and management levels were the main factors influencing the wetland ecosystem health in Hubei Province.