水生态学杂志2025，Vol.46Issue(5)：20-36,17.DOI:10.15928/j.1674-3075.202505090004
基于PVOR模型的海岛型城市生态脆弱性评价及其影响机制
Ecological Vulnerability Assessment and Influencing Factor Analysis for an Island City Based on the PVOR Model
摘要
Abstract
Accurate assessment of ecological vulnerability for island cities facing a combination of natu-ral and anthropogenic stresses is crucial for maintaining insular ecosystem integrity and guiding sustain-able resource utilization.In this study,the Pingtan comprehensive experimental zone of Fujian Province was selected for case study and we explored the spatiotemporal distribution of ecological vulnerability in the zone based on the Pressure-Vigor-Organization-Resilience(PVOR)conceptual model,developed as part of this project.Meanwhile,we analyzed key influencing factors of ecological vulnerability using geo-detector.The construction of the PVOR model was based on data from remote sensing images,statistical surveys,and geospatial information in the study area at five-year intervals from 2000 to 2020.The weight-ing of each indicator was established using game theory combination weighting.Applying this frame-work,we conducted long-term spatiotemporal evolution monitoring of ecological vulnerability in the study area from 2000 to 2020 and analyzed key influencing factors.Results show:(1)The comprehensive ecological vulnerability index was 0.52,0.53,0.58,0.59 and 0.64,respectively,in 2000,2005,2010,2015 and 2020,a consistent increase.The ecological vulnerability in Pingtan was generally classified as mild to moderate,accounting for approximately 70％of the total study area.However,the high-vulnerability area expanded by 21.3％,and environmental degradation was evident.The areas of rising ecological vulnerabil-ity were primarily concentrated in urban construction and development zones,land reclamation areas,and regions surrounding artificial coastlines.(2)Ecological vulnerability exhibited strong spatial clustering and significant spatial autocorrelation characteristics,with the global Moran's I value increasing from 0.929 to 0.958(P＜0.05).High-high clustering areas(regions with high vulnerability surrounded by high-vulnerability areas)were primarily concentrated in the urban center of the Haitan subdistrict and were ex-panding,while low-low clustering areas were mainly distributed in the Junshan area in the north.(3)Geo-graphical detector analysis revealed that ecological quality(q=0.59),habitat quality(q=0.63),island devel-opment intensity(q=0.53),and landscape fragmentation(q=0.31)were the key factors influencing ecologi-cal vulnerability.Further,the interactive effects between factors exceeded the individual contributions of any single factor and the interactive effects were non-linear.Our study will provide a scientific basis for ecological restoration and spatial planning in island cities.关键词
海岛型城市/生态脆弱性/PVOR模型/组合权重/平潭综合实验区Key words
island city/ecological vulnerability/pressure-vigor-organization-resilience(PVOR)model/integrated weighting/Pingtan comprehensive experimental zone分类
资源环境引用本文复制引用
池济昌,庄曦,唐菲,王琳..基于PVOR模型的海岛型城市生态脆弱性评价及其影响机制[J].水生态学杂志,2025,46(5):20-36,17.基金项目
福建省自然科学基金面上项目(2023J01417) （2023J01417）
福建省海岛资源生态监测与保护利用重点实验室开放课题(2023ZD09). （2023ZD09）
