The persistence of Pliocene populations through the Pleistocene climatic cycles: evidence from the phylogeography of an Iberian lizard.

摘要: Ancient climatic fluctuations have caused changes in the demography and distribution of many species. The genetic differentiation between populations same species sister is often attributed largely to more recent Pleistocene fluctuations. Recent interpretations, which implicate earlier episodes, proved controversial. We address timing divergence Iberian lizard Lacerta schreiberi by studying phylogeography cytochrome b sequence. has a remarkable morphological uniformity, yet our evidence suggests that events Pliocene initiated main populations. This interpretation implies different survived through separate localities. conclusion robust molecular clock calibrations. persistence wide implications for understanding refugia this and, extension, biogeography whole region.