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Antarctic Invasion
February 20, 2008

Global climate change could open the Antarctic up to predators it hasn’t seen in millions of years.

Transcript

BOB HIRSHON (host):
Antarctica’s melting boundaries. I‘m Bob Hirshon and this is Science Update.

Organisms on islands often evolve in the absence of predators formillions of years. If predators are re-introduced by humans, theseorganisms are ill-equipped to defend themselves and sometimes goextinct. Well, it turns out that life in the Antarctic shelf has beensimilarly isolated by being too cold. Many marine organisms thrivedhere in the cold for millions of years in the absence of top seafloorpredators. But according to marine ecologist Sven Thatje of theUniversity of Southampton in England, global warming could once againopen up the high Antarctic to top predators such as sharks and crabs.

SVEN THATJE (University of Southampton):
Species from the lower latitudes will press into the Antarctic environment because suddenly they’ll be able to live there.

HIRSHON:
He predicts that invading predators will have a major impact on theAntarctic ecosystem in the future. I’m Bob Hirshon, for AAAS, thescience society.