Darwin’s ideas that became the research program in Dispersal Biogeography

• Centers of origin

• Dispersal mechanisms (capabilities of organisms)

• Dominant groups/adaptive radiations

  • Large genera (genera with many species) have more variation and so are more likely to speciate
  • Successful groups have widespread species with speciation of peripheral isolates

• Barriers to dispersal

• Islands as “hotbeds” of evolution

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