基于贝叶斯网络的南京市生态保护红线区人类活动干扰风险评价

    Bayesian Network-based Risk Assessment under Anthropogenic Disturbance in the Ecological Conservation Redline Regions of Nanjing City

    • 摘要: 生态保护红线是保障国家和地方生态安全的底线和生命线。随着城市化的快速发展, 建设用地不断扩张、人口不断聚集, 高度密集的人类活动对生态保护红线区的生境及动植物造成严重威胁。以南京市生态保护红线为研究区, 基于贝叶斯网络, 构建了人类活动(危险性)-风险因子(联合暴露)-生态保护红线(脆弱性)-人类活动干扰风险的风险传递网络, 概率化表征了2020年城镇、农田、交通(铁路、高速公路、国道省道)、采矿及矿产地等风险源对生态保护红线区各生态受体(森林及灌丛、湿地、草地、农田等)的人类活动干扰风险。结果表明, 南京市建邺区生态保护红线人类活动干扰风险最值得关注, 高风险概率为3.13%;人类活动危险性最值得关注的区域均位于南京市建成区(秦淮区、雨花台区和鼓楼区), 生态保护红线脆弱性最值得关注的区域则位于南京市郊区(高淳区和六合区)。基于敏感性分析, 从监管生态保护红线内人类活动、促进重要湿地管理与保护、改善生态环境监测能力等方面为建邺区生态环境管理成效提升提供建议, 研究结果可为生态保护红线区的人类活动监管与风险管理提供参考与借鉴。

       

      Abstract: Ecological conservation redlines are baselines and lifelines to guarantee national and local ecological safety. Rapid urbanization development has led to anthropogenic disturbance expansion and urban population aggregation. Highly intensive anthropogenic activities have posed great threats to habitats and wildlife in the ecological conservation redlines. Taking the ecological conservation redline of Nanjing City as the research area in this study, the risk transfer network "human activity (hazardousness)-risk stressor (joint exposure)-ecological conservation redline (vulnerability)-anthropogenic disturbance risk" based on the Bayesian network was proposed. After that, the anthropogenic disturbance risk, which was caused by risk sources including construction land, cropland, transport land, and mining areas, was probabilistically evaluated. The following results were obtained: (1) The anthropogenic disturbance risk level was the highest in the red-line regions of Jianye District, corresponding to approximately 3.13% of high risk; (2) The hazardousness level under human activities was relatively higher in the built-up areas (especially in Qinhuai, Yuhuatai, and Gulou districts) than in the suburbs of Nanjing City, while the vulnerability level was relatively higher in the suburbs (especially in Gaochun and Liuhe districts) than in the built-up areas of Nanjing City; (3) According to the sensitivity analysis, ecological management of Jianye District can be improved by the supervision of human activities within red-line regions, important wetlands management and protection, and ecological environment monitoring capacity enhancement. This research may provide technical support for the supervision of human activity and risk management in the ecological conservation redlines.

       

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