鄱阳湖生态系统服务功能状况评价模型及应用

为准确评价鄱阳湖生态系统服务功能状况,应用层次分析法和模糊评价法构建生态系统服务功能状况评价模型,对2010~2014年鄱阳湖生态系统服务功能状况进行评价。结果表明,供给服务、调节服务、文化服务和支持服务权重分别为0.121 9、0.263 3、0.056 9、0.557 9;2010~2014年鄱阳湖生态系统服务功能状况综合评价指数分别为0.723、0.732、0.731、0.710、0.682,评价等级均为良,2011~2014年整体呈下降趋势,一定程度上表明鄱阳湖生态系统服务功能正在退化;供给服务、调节服务和支持服务是影响鄱阳湖生态系统服务功能状况的因素,其中调节服务功能状况既是影响鄱阳湖生态系统服务功能状况的最主要因素,又是导致近年来鄱阳湖生态系统服务功能下降的主要原因,主要受湖泊天然调洪能力和水功能区水质达标率影响。研究结果为湖泊生态系统服务功能评价提供技术支撑。

Evaluation Model for Ecological Service Function of Poyang Lake and Its Application

An evaluation model combining AHP and fuzzy comprehensive evaluation was constructed and applied to evaluate the ecological service function of Poyang Lake. Results show that the weights of supply service, regulating service, cultural service and support service were 0.121 9, 0.263 3, 0.056 9 and 0.557 9 respectively. All the comprehensive evaluation indexes could reach good grade but with a declining curve from 2011 to 2014, which were 0.723, 0.732, 0.731, 0.732 and 0.731, respectively. Regulating service, supply service and support service were the influencing factors for Poyang Lake ecosystem service. Regulating service was not only the main impact factor of Poyang Lake ecosystem services, but also the main reason why the ecosystem service declined in recent five years, was due to the ability of natural flood regulating and the water quality index of water function zones. This research could provide a technical support for ecosystem service function evaluation of lakes.