群落物种多度的分形模型和一般性分布规律的验证与探讨

高俊峰, 苏强

Verification and Discussion on Fractal Model and the General Pattern on Species Abundance in Community

Junfeng GAO, Qiang SU

图3 采用Su［20］提出的分形模型对从BFD中随机选取的4个自然群落的拟合 r按物种多度降序排列后的排序位数，N1和Nr分别表示降序排序中第1位和第r位物种的个体数量；R2为拟合优度，取值范围在0和1之间，R2越接近1，拟合结果越好

Fig. 3 The Su's fractal model［20］ fits four natural communities randomly selected from BFD The r was arranged in descending order of species abundance. N1 and Nr are the abundances of the 1st and r-th species in descending order of species abundance， respectively. R2 is the goodness of fit. The closer R2 is to 1， the better the fitting result is