佛山市顺德中心城区城市绿地生态网络规划

以佛山市顺德区中心城区为研究样区,基于景观连通性定量评价方法确定绿地系统核心斑块,并采用最小费用路径法构建了绿地系统潜在的生态廊道,同时还对绿地生态网络各组分的景观格局特征进行了分析。结果表明:斑块连通性指数距离阈值设定为500m时能够合理反映各绿地斑块重要性程度,并以连通性指数重要值排序结果确定了20个绿地斑块作为绿地生态网络的核心斑块;通过最小费用路径法构建的研究区31条潜在生态廊道,符合绿地系统分布特征并能够较好地连通各绿地核心斑块;生态网络景观格局分析表明,生态廊道缓冲区内斑块类型较复杂,景观格局破碎化程度较高。

Ecological network planning of urban green space in urban center of Shunde District, Foshan City, Guangdong Province of South China

Taking the urban center of Shunde District,Foshan City of Guangdong province as a case,a quantitative evaluation based on landscape connectivity was made to determine the core patches of green space system,and the least-cost path method was adopted to establish the potential ecological corridors of the green space system.The characteristics of the landscape patterns of the ecological network components were also analyzed.According to the comparison of landscape connectivity indices at different distance thresholds,a distance threshold of 500 m could reasonably interpret the importance degree of green patches,and a total of 20 patches were determined as the core patches of the green space ecological network,based on the ordering of the importance values of landscape connectivity indices.Thirty-one potential ecological corridors were established by the least-cost path method,which were conformed to the green space distribution features and connected well to all the core patches of the green space ecological network.The analysis on the landscape patterns of ecological network components indicated that the patch types within the buffer zones of the ecological corridors were rather complicated,and the landscape fragmentation was at a higher level.