基于PSR模型的独流减河河口生态系统健康评价

HEALTH ASSESSMENT OF DULIUJIANHE RIVER ESTUARY ECOSYSTEM BASED ON PSR MODEL

基于河口生态系统健康内涵,结合独流减河河口的实际情况,首次构建了基于PSR模型的独流减河河口生态系统健康评价指标体系,确立了生态系统健康等级及标准,通过层次分析法确定了指标权重。采用所建立的评价指标体系,通过河口生态系统压力评价、状态评价和响应评价首次对独流减河河口进行了生态系统健康综合评价。结果表明:独流减河河口生态系统健康综合指数为0.471,处于亚健康状态,社会因素是造成河口生态系统退化的主要原因。在此基础上提出了河口生态恢复和科学管理的建议。

Based on the connotation of estuary ecosystem health and the actual situation of Duliujianhe River estuary, a set of ecosystem health index system of Duliujianhe River estuary based on PSR model is proposed for the first time. The grade and standard of ecosystem health are established. And the index weights are determined by analytic hierarchy process. The established index system is applied to evaluate ecosystem health in Duliujianhe River estuary by means of pressure evaluation, state evaluation and response evaluation. The results showed that the ecological health index of Duliujianhe River estuary was 0. 471. It means that the Dufiujianhe River estuary is in the sub-health condition. The main reasons which cause the damage to estuary ecosystem are attributed to several social factors. Meanwhile, some suggestions are put forward for ecological restoration and scientific management in the future.