大金山岛生态承载力评价

Evaluation of ecological carrying capacity of Dajinshan Island

摘要:

根据上海市近海海洋综合调查与评价（简称上海市“908”专项）的调查数据及相关遥感图像、统计年鉴、学者近年研究数据，运用层次分析法对大金山岛生态承载力进行分层指标体系构建及指标权重分析，以模糊综合评价法计算各指数隶属度值，定量分析了生态承载力与生态弹性力、资源承载力、生态系统压力三者的相关关系。研究表明：大金山岛生态弹性力、资源承载力、生态系统压力最大隶属度分别为0.36、0.48、0.86，等级均为优；总体生态承载力最大隶属度为0.49，等级为优。生态承载力大体上与资源承载力和生态弹性力呈正相关，与生态系统压力呈负相关。

Abstract:

According to the survey data from Integrated Investigation and Assessment of Shanghai Coastal Ocean (908 Project for short), as well as the related remote sensing images, statistical yearbook and research data by scholars in recent years, we established the layered index system and analyzed the index weight to the ecological carrying capacity of Dajinshan Island by using Analytic Hierarchy Process. The membership degree value of each index was calculated through Fuzzy Comprehensive Evaluation to quantitatively analyze the correlation between ecological carrying capacity and ecological resilience, carrying capacity of resources, and ecosystem stress. This study shows that the maximum membership degree of the ecological resilience, carrying capacity of resources and ecosystem stress of Dajinshan Island are 0.36, 0.48 and 0.86, respectively, and the ratings are all excellent. And the maximum membership degree of total ecological carrying capacity is 0.49, and the rating is excellent. We conclude that ecological carrying capacity is generally positively correlated with the carrying capacity of resources and ecological resilience, while it is negatively correlated with ecosystem stress.