基于生态保护红线的肇庆市生态安全格局构建

Construction of Ecological Security Pattern based on Eco-redlines:A Case Study of Zhaoqing City

以肇庆市为研究区,将全市生态保护红线范围识别为重要生态源地,利用最小累计阻力模型提取生态廊道后,将提取的生态廊道与周边的河流水系进行充分衔接,形成优化后的生态廊道,构建肇庆市生态安全格局,为深入推进绿美肇庆生态建设提供参考和依据。研究结果表明:①利用定性分析和定量分析划定的生态保护红线综合考虑了社会经济发展与生态保护的关系,在生态安全格局构建中可直接识别为区域内的重要生态源地。②全市共识别出87个重要生态源地,面积合计2717.39km^(2),占全市国土面积的18.24%。其中:9个一级生态源地,面积合计1982.07km^(2),占全市国土面积的13.30%;78个二级生态源地,面积合计735.32km^(2),占全市国土面积的4.94%。③全市共提取了57条生态廊道,总长度1871.15km。其中:10条用于连通各一级生态源地的一级生态廊道,总体呈现“五横五纵”的分布特征;47条用于连通各二级生态源地的二级生态廊道,呈辐射状分布于全市。

Taking Zhaoqing City as the study area,the Eco-redlines are identified as the significant ecological sources and,the ecological corridors are extracted by using the minimum cumulative resistance model,which are used to construct the Ecological Security Pattern in Zhaoqing City.The study found out that the Eco-redlines,which are delimited by using both of qualitative and quantitative research methods can be identified as the ecological source directly.There are 87 significant ecological sources identified in Zhaoqing City,with an area of 2717.39 km^(2)and account for 18.24%of total areas of Zhaoqing City,which include 9 one-level ecological sources and 78 two-level ecological sources.There are 57 ecological corridors extracted in Zhaoqing City with a total length of 1871.15 km,which include 10 one-level ecological corridors connecting all the one-level ecological sources and 47 twolevel ecological corridors connecting all the two-level ecological sources.