垂枝柏复合体的物种界定

程家劲, 马仁义, 毛康珊

Species delimitation of Juniperus recurva complex

Jiajin Cheng, Renyi Ma, Kangshan Mao

图4 垂枝柏和小果垂枝柏的生态位重叠分析及等价性和相似性检验。(a)生态位重叠分析。(b-c) D和I值的等价性检验。(d-e) D和I值的相似性检验。D和I分别表示Schoener’s D值和Hellinger-based I指数, 取值范围均为0 (无重叠)到1 (完全重叠)。灰色矩形为D和I值的零分布，红色线为D和I值的观测值。

Fig. 4 Niche overlap and tests of equivalency and similarity between Juniperus recurva and J. coxii. (a) Niche overlap analysis. (b-c) Niche equivalency test for D and I. (d-e) Niche similarity test for D and I. D and I represent Schoener’s D and Hellinger-based I indices, respectively, with values ranging from 0 (no overlap) to 1 (complete overlap). The grey bars indicate the null distribution of D and I values, and the red lines indicate the observed values of D and I.