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作 者:于颖 孟京辉[1] 宋增明 徐露 YU Ying;MENG Jinghui;SONG Zengming;XU Lu(College of Forestry,Beijing Forestry University,Beijing 100083,China;GEF Project Executive Office of Beijing State-owned Forest Farm,Beijing 100013,China;GEF Project Executive Office of Jiangxi State-owned Forest Farm,Nanchang 330038,China)
机构地区:[1]北京林业大学林学院,北京100083 [2]北京国有林场GEF项目执行办,北京100013 [3]江西国有林场GEF项目执行办公室,江西南昌330038
出 处:《南京林业大学学报(自然科学版)》2023年第4期226-234,共9页Journal of Nanjing Forestry University:Natural Sciences Edition
基 金:江西省科技创新专项项目(创新专项[2019]13号)。
摘 要:【目的】探索构建生态网络以恢复破碎景观、提升景观连通性的新思路,为县域景观格局优化和生态红线保护提供科学依据。【方法】以江西信丰县为对象,基于景观格局构建生态风险指数,评估其生态风险水平,结合最小累积阻力模型(MCR)和景观连通性分析,确定生态源地、区分一般廊道和重要廊道,构建以信丰县为案例的县域潜在生态网络。【结果】信丰县城市建设用地和耕地集中区域的生态风险相对较高,而森林覆盖区域的生态风险相对较低;潜在生态网络由30个生态源地、67条生态廊道、25个生态节点构建而成;重要生态廊道在东西方向和南北方向生态斑块的沟通与连接中起到关键作用,一般生态廊道将多个相邻、分散的生态源地连接到一起。【结论】景观连通性分析不仅可用于确定斑块重要性,还可用于确定廊道重要性。生态风险评估与生态网络构建相结合,可加强县域生态网络的完整性和可靠性。【Objective】This study aims to explore a new idea of building ecological network to restore broken landscape and improve landscape connectivity,and to provide scientific basis for landscape pattern optimization and ecological red line protection in Xinfeng County.【Method】Taking Xinfeng County,Jiangxi Provinceas as the object,an ecological risk index was constructed based on landscape pattern to assess the ecological risk level,combined with the minimum cumulative resistance model(MCR)and landscape connectivity analysis,the ecological sources were identified and the general,important corridors were distinguished,and the county potential ecological network was constructed with Xinfeng County as the case.【Result】The ecological risk of urban construction and cultivated concentration area was relatively high,while the forest cover area was relatively low;the potential ecological network was consisted by 30 ecological sources,67 ecological corridors and 25 ecological nodes.Important ecological corridors play a key role in the communication and connection of ecological patches in the east⁃west and north⁃south directions,and general ecological corridors connect multiple adjacent and scattered ecological sources together in Xinfeng County.【Conclusion】Landscape connectivity analysis can be used to determine not only patch importance but also corridor importance.The combination of ecological risk assessments and ecological network construction strengthens the integrity and reliability of county ecological network.
关 键 词:景观生态风险 生态网络 最小累积阻力模型(MCR) 景观连通性 信丰县
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