Phylogenetic biogeography

Abstract

Phylogenetic biogeography is divisible into vicariance and dispersal biogeography. The former involves immobilism (vicariant form-making), the latter mobilism, and the two alternate and interplay. Vicarianism arises by local form-making during immobilisation within ranges that may have been acquired in an ancestral state by dispersal. Development of barriers causes vicariance and leads to allopatric speciation; disappearance of barriers allows range expansion; and jump dispersal over pre-existing barriers may also result in speciation through allopatry. -P.J.Jarvis