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基于“源地−阻力−廊道”的福州市生态安全格局构建

Ecological security pattern construction of Fuzhou based on source-resistance-corridor

  • 摘要: 基于遥感生态指数探讨了福州市近20年的景观生态特征,并结合生态敏感性评价指标体系识别了不同等级生态源地,从自然和社会因素方面选取了5个阻力因子构建综合阻力面,基于电路理论模型识别生态廊道等关键生态要素,共同构建了福州市生态安全格局。结果表明:共识别福州市生态源地面积2 992.38 km2,占总面积25.97%,整体呈现西密东疏的空间分布格局;识别生态廊道共78条,整体呈现中西部生态廊道分布密集、东南部廊道分布稀疏的空间形态;识别生态夹点面积12.83 km2,集中分布在生态质量较高的北部和西北部区域;生态障碍点面积31.68 km2,主要分布在福州市主城区位置。

     

    Abstract: In the report, based on the remote sensing ecological index, the landscape ecological characteristics of Fuzhou during the past 20 years were investigated, and the ecological sources with different levels were identified using an ecological sensitivity evaluation index system. Five resistance factors which are derived from natural and social dimensions were selected to construct a comprehensive resistance surface. The critical ecological components which include circuit theory model identifying ecological corridors were used to construct the Fuzhou's ecological security framework. The results indicated that the identified ecological source areas in Fuzhou covered approximately 2992.38 km2, accounting for 25.97% of the total area, and which display a spatial distribution characterized by higher density in the west and lower density in the east. A total of 78 ecological corridors were identified, with a spatial pattern of dense distribution in the central and western regions and sparse distribution in the southeast. The ecological pinch points covered an area of 12.83 km2, which are concentrated in the northern and northwestern regions with higher ecological quality, while the ecological obstacle points covered 31.68 km², and which are primarily located in the main urban area of Fuzhou.

     

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