“Where the Weird Things Are”
size and richness.
Conditions are unusual on islands
• Habitat competition is greater
• Predators may be absent
• Biodiversity is lower
• Breeding populations are isolated
• As a result of unusual conditions and isolation, islands often develop
species which are distinct from the mainland.
• Foster’s rule: on a small island with an isolated breeding population,
small animals tend to get bigger and large animals tend to get smaller.