中国竹亚科植物空间相似性及分区

Spatial Similarity Coefficient and Regionalization in Bambusoideae of China

采用地理信息系统技术,以县为基本单元,计算了中国竹亚科植物属间相似性系数,制作了空间多样性图和分区图。依据相似性系数聚类分析将中国竹亚科植物划分为6个区,即中国热带-南亚热带区、中国南部区、中国东南区、中国西藏区、中国西南区和高黎贡山区。结果表明:中国热带-南亚热带区竹种向北沿横断山脉、四川盆地西缘与中国西南区、中国西藏区相联系,向东沿长江流域与中国南部区相联系,珠江流域是中国热带-南亚热带区与中国东南区联系的重要纽带。

The Geographic Information System （GIS） was adopted in this paper,which was used to make the maps of spatial diversity and regionalization of Bambusoideae in County--level of China. The region among genera of Bambu- soideae in China was divided into six parts based on similarity coefficient cluster analysis,such as the tropic -- South sub--tropic zone, the south zone, the southeast zone, the Tibet zone, the southwest zone and the Gaoligong mountain zone. The tropic -- South sub--tropic is northward in association with the southwest zone and the Tibet zone by way of the Hengduan Mountain and the western margin of the Sichuan Basin. It is eastward linked to the south zone by the Yangtze River. The Pearl River is an important southern road link between the tropic ~ South sub--tropic zone and the southeast zone.