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Wysłany: 2009-05-30, 15:26 Polar Bear-tĹ‚umaczenie
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While it has been known for some time that the polar bear is in trouble, new research shows that Arctic ice - the polar bear's primary habitat - is melting much faster than scientists had believed, says U of A biologist Dr. Andrew Derocher.
Derocher says if global warming continues unchecked, some remnant populations of polar bears may manage to hang on in the high Canadian archipelago or on permanent polar ice at very high latitudes.
Polar bears can tolerate some environmental variation from year to year, foregoing reproduction in any given year if conditions are poor." With too much variation, however, reproduction will fall off dramatically, and populations will quickly decline.
While it has been known for some time that the polar bear is in trouble, new research shows that Arctic ice - the polar bear's primary habitat - is melting much faster than scientists had believed, says U of A biologist Dr. Andrew Derocher.
Derocher says if global warming continues unchecked, some remnant populations of polar bears may manage to hang on in the high Canadian archipelago or on permanent polar ice at very high latitudes.
Polar bears can tolerate some environmental variation from year to year, foregoing reproduction in any given year if conditions are poor." With too much variation, however, reproduction will fall off dramatically, and populations will quickly decline.
