鼎湖山南亚热带常绿阔叶林群落垂直结构及其物种多样性特征

桂旭君,练琚愉,张入匀,李艳朋,沈浩,倪云龙,叶万辉

Vertical structure and its biodiversity in a subtropical evergreen broad- leaved forest at Dinghushan in Guangdong Province, China

Gui Xujun,Lian Juyu,Zhang Ruyun,Li Yanpeng,Shen Hao,Ni Yunlong,Ye Wanhui

图1 最优分类组数判断指标。(a)不同分类情况下的各对象归属和各分类组数对应的ssi (simple structure index)值, 其中左边的图表示每个对象在不同分类情况下的归属, 一种颜色代表一个分类组; 右图展示了不同分类组数对应的ssi值大小。(b)不同分类组数时分成的各类的组内平方和。

Fig. 1 The judgment index partitioning optimal groups. (a) Attribution of the objects and the corresponding ssi (simple structure index) values for different number of groups. The panel on the left shows the groups that each object is categorized with different conditions and different groups were distinguished by different colors; the panel on the right shows the value of ssi for different number of groups. (b) Value of sum of squares within groups for different number of groups.