Wednesday, July 28, 2010

Pika driven from traditional habitat by warming trend

As temperatures have risen, populations of the American pika have moved from lower elevations to cooler climes upslope.

Enlisting Endangered Species As a Tool to Combat Warming
Environment 360
by todd woody

While a high-profile battle raged over listing the polar bear as a threatened species due to melting Arctic sea ice, U.S. environmentalists were quietly building a case to protect a critter closer to home, one whose existence also seems gravely threatened by a warming world.

A pocket-sized member of the rabbit family with a distinctive squeak and large ears that frame dark eyes and a button nose, the American pika lives on rocky slopes high in alpine mountain ranges from the Sierra Nevada to the Rockies. Sporting a thick gray-brown coat, the pika does not hibernate and so maintains a high internal temperature to survive frigid winters. Because it can’t turn off its heater, the animal can die in the summer if its body temperature increases by as little as 3 degrees Celsius (5.4 F).

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