江苏太湖流域景观格局特征分析

Analysis of landscape pattern change in Taihu Basin of Jiangsu

为更好地理解城市的景观生态学意义,研究计算了江苏太湖流域景观类型多样性的空间聚类特征。结果表明:(1)局部空间自相关系数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,其形状与研究区城镇建设用地分布格局相似。(2)城镇建设用地主要与农村建设用地和水域景观毗邻,其两侧300 m缓冲区内主要景观类型为水域和林地,其景观破碎度小。(3)经济的快速发展对研究区的土地利用景观格局影响较大,其对江苏太湖流域的景观多样性起着重要的作用,因此,需进一步提高城镇建设用地周边自然景观,如林地、草地等的连通度,保持周边景观多样性。

In order to better understand the significances of urban landscape ecological, the spatial clustering characteristics of landscape type diversity and landscape pattern of Taihu Basin of Jiangsu Province were calculated. Results were as follows. （1）The local spatial autocorrelation index Getis-Ord Gi＊ displayed that the high value clustering area of the landscape type diversity scattered all over the study area; the distribution of the hot spot areas was similar to the spatial pattern of the construction land. （2）Urban construction land was more directly adjacent to rural construction land and waters. The buffer areas of the construction land were mainly waters and forests, while the overall landscape was smaller fragmentized. （3）The rapid economic development had larger impacts on the landscape pattern and played a positive role in the landscape diversity of Taihu Basin of Jiangsu Province. Thus, in order to keep the surrounding landscape diversity, the surrounding natural landscape of urban construction must be further improved; the connectivity of forest and grass must be strengthened.