Birds helped acacia trees travel 18,000km from Hawaii to Réunion Islands
02 Jul 2014
Island biogeography theory predicts that most island species originate from nearby mainland regions and therefore arrive through rare, long-distance dispersal events. How close islands are to mainland regions must therefore be an important factor in determining the make-up of island biotas. For example, the Hawaiian Islands are approximately 4000 km from the nearest mainland and it is estimated that historically one new species arrived every 35 years or so.