Niche overlap among guanaco lineages.

Similarity (I), Schoener’s distance (D), and Relative Rank index indicate similarity between niche overlap. Range overlap is based on ranges where 0.25 threshold of suitability is assumed.相似性指数I（Similarity (I)）、舍讷尔距离（Schoener’s distance，记为D）与相对秩指数，可用于表征生态位重叠（niche overlap）的相似程度。分布范围重叠（Range overlap）的计算基于预设适宜性阈值为0.25的分布范围。