【摘要】 盐沼生态系统的科学评估研究可为生态系统问题的识别诊断、修复与保护提供科学依据。本研究以崇明东滩盐沼生态系统为研究对象，以“压力（pressure）-状态（State）-响应（Response）,(PSR)”模型建立了退化评估体系，并用层次分析法计算了各评价指标的权重。结果表明：崇明东滩盐沼生态系统状态为“轻度退化”，主要压力源来自崇明东滩东南部岸滩的侵蚀和互花米草入侵，盐沼状态退化主要表现在底栖生物的密度、生物量等方面。盐沼生态系统的功能响应主要体现在盐沼植被本地种面积的减少，表明崇明东滩盐沼生态系统存在不稳定因素。更多还原

【Abstract】 The scientific assessment of salt marsh ecosystem can provide basis for the identification, diagnosis, restoration and protection of ecosystem problems. In this paper, we studied the ecosystem of salt marsh in Chongming Dongtan, the degradation assessment system is established by Pressure-State-Response model, and the weight of each evaluation index is calculated by AHP. The results showed that the state of the salt marsh ecosystem was "mildly degraded", the main stress source was from the bank erosion in the southeast of the east beach of Chongming and Spartina alterniflora invasion. The main state degradation of the salt marsh was reflected in the density and biomass of benthic organisms, and the functional response degradation of the salt marsh was mainly reflected in the reduction of the local species area of the salt marsh vegetation. It indicates the existence of salt marsh ecosystem instability.更多还原