Figure 4

Distribution and variation of importance values and numbers of shrub families at different elevations. There were 6 elevations for the shrub community. At each elevation, the importance values of the shrub families were arranged in ascending order to obtain the dominant family. Data for each shrub family were averaged from 64 sub-quadrats at each elevation. Finally, regression analyses were carried out on relationships between the family number of the shrub community and the importance value of the dominant family (Rosaceae) along the altitudinal gradient.