The U.S. Endangered Species list already holds six sea turtle species: green turtles, hawksbills, loggerheads, Kemp's ridleys, Olive ridleys and leatherbacks. To add to the turtles' troubles, climate change poses another attack. First, rising sea levels wash away prime nesting grounds on tropical beaches, especially in places like the Maldive Islands that were never far above the sea to begin with.
Second, as the temperature of the sand on those disappearing beaches increases, it's almost too hot for turtle eggs to incubate safely. Once the sand reaches 34 degrees Celsius (93 degrees Fahrenheit), the turtle eggs get cooked. Even before the sand reaches a deadly temperature, it influences the sex ratio of the offspring. At warmer temperatures, more females develop than males.
However, a study in Conservation Biology found that the males that are born work extra hard to fulfill their paternal duties and visit breeding grounds twice as often as females, which could reduce the effects of the female domination of the turtle dating pool.