基于粒度反推法的昌江县景观格局优化

利用GIS技术、粒度反推法和最小累积耗费模型,从增强生态系统整体连通性的角度,对昌江县进行了景观格局优化分析,探讨了生态源地客观选取、生态廊道和生态节点建设措施。结果表明:①昌江县最优景观组分结构的粒度为600 m,有生态源地14个,需新增21个生态景观斑块以优化生态源地;②生态源地分布规律为中部数量多但规模小、东南部及西北部数量少但规模大,主要受人为干扰影响;③利用显性、隐性生态阻力,以及地形因子构建的生态阻力面,指示了生态系统中生态陷阱的位置;④有生态廊道32条、生态节点29个,根据类型的不同提出了建设措施;⑤从生态连接和稳定性的角度,结合粒度反推法和空间网络分析得出了生态节点的空间形状,总面积201.49 hm^2。

Landscape Pattern Optimization Based on Granularity Inverse Method in Changjiang County

Using GIS technology,granularity inverse method and minimal cumulative resistance model to enhance the ecosystem from an angle of overall connectivity,it carried out landscape pattern optimization study on Changjiang City.This paper discussed objective selection of ecological sources and construction measure of ecological corridors and ecological nodes.The results showed that:①600 m granularity landscape component was the optimal structure for Changjiang City.There were 14 ecological sources in Changjiang City.In order to optimize ecological sources,21 pieces of ecological landscape patches need to be newly increased.②The distribution trend of ecological sources was characterized by a large quantity but small scale in the central section and small quantity but large scale in the southeast and northwest,which was mainly influenced by human disturbance.③Dominant ecological resistance surface,recessive ecological resistance surface and slope index had been made up,and it could indicate the location of ecological traps in ecosystems.④There were 32 ecological corridors and 29 ecological nodes in Changjiang City,and according to different types,the construction measures were put forward.⑤This study combine granularity inverse method with spatial network analysis to carries out the spatial form of ecological nodes from the perspective of ecological connectivity and stability,and the total area of ecological nodes was 201.49 hm^2.