P-S-R模型在海河流域湿地生态安全评价中的应用

以生态安全理论为基础,基于湿地普查和重点湿地调查结果,应用P-S-R模型,从压力、状态、响应3个方面对海河流域10个重要湿地进行生态安全评价。结果表明:海河流域重要湿地生态安全状况不容乐观,10个重要湿地中有9个处于预警状态,1个处于中度预警状态。其中生态安全指数最高的是大黄堡洼,为5.995 0,最低的为大浪淀湿地,为3.834 0,海河流域湿地整体生态安全状况近年来有向中度预警甚至极度预警状态恶化的趋势;指出必须重视海河流域湿地的生态安全建设。

Application of P-S-R model to evaluation of wetland ecological security in Haihe Basin

Based on the ecological security theory and wetland investigation results, the ecological security of ten major wetlands in the Haihe Basin were evaluated using the pressure-state-response （P-S-R） model, which considers the eco- environmental pressure, the state of the ecological environment, and human and social response. The results show that the ecological security of the investigated wetlands is not satisfying. Of the ten major wetlands, nine wetlands were in the early-warning state and one was in moderate early-warning state. The highest ecological security index was 5. 995 0 in the Dahuangpu Wetland and the lowest one was 3. 834 0 in the Dalangdian Wetland. The ecological security of the wetlands in the Haihe Basin has shown a trend of deterioration from the moderate early-warning state to extreme early-warning state in recent years. It is pointed out that high attention should be attached to the ecological security of the wetlands in the Haihe Basin.