河流廊道的城市景观生态意义分析——以四川省邛崃市为例

为更好地理解河流廊道对城市景观生态的意义，研究计算了四川省邛崃市景观类型多样性空间聚类特征和河流廊道景观格局特征。结果表明：（1）局部空间自相关指数Getis Ord Gi*显示研究区土地利用景观类型多样性存在高值聚类区，其形状与研究区河流廊道分布格局近似。（2）河流廊道主要与农田和林地景观毗邻，其两侧300 m缓冲区内主要景观类型为农田和林地，且林地破碎度小；而道路廊道主要与农田和建设用地毗邻，其两侧缓冲区内主要景观类型为农田和建设用地，其景观更为破碎化。（3）地形因素对研究区西部山区土地利用景观格局影响较大，景观类型多样性统计热点区域分布于西部河流台地。邛崃市河流廊道在提高该地区土地利用景观类型多样性中起到积极作用，需要保护邛崃市河流廊道景观多样性，加强河流与自然景观的连通性

ANALYZING THE SIGNIFICANCES OF RIVER CORRIDORS IN URBAN LANDSCAPE ECOLOGY 

In order to better understand the significances of river corridors in urban landscape ecology, the spatial clustering characteristics of landscape type diversity and landscape pattern of Qionglai city were calculated. Results showed as follows. (1) The local spatial autocorrelation index Getis Ord Gi* displayed that high value clustering areas of the landscape type diversity scattered all over the study area, which accounted for 506% of the total area of Qionglai city. The distribution of the hot spot areas was similar to the spatial pattern of the rivers. (2) The buffer area of the river corridors were mainly farmland and forests, and the average patch area of forests was larger. While the buffer area of the road corridors were mainly the farmland and building land, and the overall landscape was more fragmentized. River corridors were more directly adjacent to farmland and forests, while the road corridors were more directly adjacent to farmland and building land. (3) The terrain factor impacted on the landscape pattern in mountainous areas of the west region of Qionglai, where the hot spot areas of landscape type diversity scattered mainly in river terraces. Thus, the city river corridors play a positive role in the landscape diversity of Qionglai. Protecting the landscape diversity of river corridors and strengthening the connectivity of the river and forest, are the main means to protect the ecological functions of river corridors in Qionglai