Dispersal of alien species redefines biogeography

It has been hypothesized that globalization of human-mediated dispersal of species may break down biogeographic boundaries. However, empirical tests had been lacking until recently. An international research team has now discovered a comprehensive biogeographic reorganization for 175 species of alien gastropods across 56 countries. The data shows that homogenization is indeed happening. Geographic barriers to dispersal have fallen down but climate still limits how species colonize new areas. —> Read More