Ambient temperature determines whether a turtle embryo will be male or female, and climate change is likely causing an overabundance of female sea turtles, says Jeanette Wyneken, director of the Marine Laboratory at Florida Atlantic University, who leads a study on sea turtle sex ratios. Sea turtle populations worldwide are already threatened by human activity, and though sea turtles have been around for 200 million years, they might not be able to adapt quickly enough to survive, says evolutionary biologist Fredric Janzen.
Scientists worry sea turtles won't adapt quickly enough to climate change
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