Hawaii: Where Evolution Can Be Surprisingly Predictable
Most people go to Hawaii for the golden beaches, the turquoise seas, or the stunning weather. Rosemary Gillespie went for the spiders.
Situated around 2,400 miles from the nearest continent, the Hawaiian Islands are about as remote as it’s possible for islands to be. In the last 5 million years, they’ve been repeatedly colonized by far-traveling animals, which then diversified into dozens of new species. Honeycreeper birds, fruit flies, carnivorous caterpillars ... all of these creatures reached Hawaii, and evolved into wondrous arrays of unique forms.
So did the spiders. There are whose abdomens look like emojis, and which Gillespie started studying in 1987. There are appropriately named long-jawed spiders, which caught her attention years later. Spiders have so repeatedly radiated on Hawaii that scientists often discover entirely and each species is named after one of the director’s films; is named after all the characters from the film “The diversity is extraordinary,” says Gillespie, an evolutionary biologist at UC Berkeley.
