Table 2.

Tests and indexes used for niche change analysis between the native and invasive ranges

Species	D	Eq. test	Sim. test	E a (%)	E na (%)	U a (%)	U na (%)
Acer negundo	0.43	0.02	0.01	0	0	5	56
Prunus serotina	0.29	0.02	0.05	0	0	38	54
Quercus rubra	0.45	0.01	0.11	6	6	8	41
Robinia pseudoacacia	0.39	0.04	0.11	7	12	6	7

Value of Schoener's D between both niches (varying from 0 for no overlap to 1 for a perfect niche overlap), equivalency (Eq. test; test's P‐value, with bold text indicating significance at α = 0.05) and similarity (Sim. test; test's P‐value, with bold text indicating significance at α = 0.05). Indexes of niche expansion (E, %) and niche unfilling (U, %) calculated considering the whole background climatic space (na) of the species from both ranges, or considering only the analogous climatic space (a) shared between both ranges.