Figure 1. Observed and modeled potential distributions for two selected species: Lissotriton vulgaris (Salamandridae, Caudata) in the Palearctic region (Blue) and Chiasmocleis ventrimaculata (Microhylidae, Anura) (Green) in the Neotropic region.

Dark colors are observed distributions and light colors are potential distributions; the smaller the difference between observed and potential distributions, the greater the expected equilibrium of species with climate. (A) Global analysis, in which models calibrated for species occurring in a particular biogeographical region are allowed to project climate space globally; (C) regional analysis, in which models are not allowed to project climate space beyond the biogeographical region in which the species occurs. Frequency distribution of equilibrium values () at the (B) global and (D) regional scales. White bars represent Anura, shaded represent Caudata, and black represent Gymnophiona.