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Feb 23,2007
Climate change decimating polar bear population
by Bend Weekly News Sources

Biologist Steven Amstrup discusses global warming, polar bears in Oregon Zoo lecture

Scientists agree: If greenhouse-gas emissions remain uncurbed, the consequences to the planet will be devastating. Wildlife biologist Steven Amstrup discusses the effects of global warming on polar bears as part of the Wildlife Conservation Lecture Series on Tuesday, Feb. 27, at the Oregon Zoo.

Amstrup, a research wildlife biologist with the Alaska Science Center, is an expert on polar bears and has studied firsthand the effects that the changing climate is having on their population. Amstrup presents his findings during the lecture "Polar Bear: Ultimate Sentinel for Climate Change."

"Polar bears almost exclusively eat seals, and they are equally as dependent upon the sea for their nutrition as are seals, whales and other aquatic animals," says Amstrup. "But because polar bears are not aquatic, their only access to the seals is from the surface of the sea ice."

Over the past 25 years, the summer sea-ice melt period has lengthened, and the summer sea-ice cover has declined by more than a half million square miles. "Longer ice-free seasons have resulted in reduced survival of young and old polar bears and a chronic population decline over the past 20 years," says Amstrup.

"Recent observations of nutritionally driven cannibalism and unexpected mortalities of prime age polar bears in Alaska are
2316 times read

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Climate Change - Its impact on People, Polar Bears, Butterflies by Bend Weekly News Sources posted on Dec 29,2006

Renowned OSU scientist kicks off lecture series on global warming by Bend Weekly News Sources posted on Jan 12,2007

First bears and then ... by The Milwaukee Journal Sentinel posted on Jan 05,2007

Sweets company scoops up polar bear's name by UPI posted on Feb 25,2008

Global warming is running out of hot air by Phyllis_Schlafly posted on Mar 27,2009

Did you enjoy this article? Rating: 4.50Rating: 4.50Rating: 4.50Rating: 4.50Rating: 4.50 (total 16 votes)

  • Id like to see the evidence behind this claim: "Longer ice-free seasons have resulted in reduced survival of young and old polar bears and a chronic population decline over the past 20 years," says Amstrup. A recent article in the Canadian National Post claims exactly the opposite. "The latest government survey of polar bears roaming the vast Arctic expanses of northern Quebec, Labrador and southern Baffin Island show the population of polar bears has jumped to 2,100 animals from around 800 in the mid-1980s." How does 165% growth from the mid-1980s constitute "chronic population decline over the past 20 years"? Maybe this Amstrup fellow is just making it all up for some publicity and government grand money. http://tinyurl.com/37k2vp
  • (Posted on March 8, 2007, 1:43 pm Dirck the Noorman)

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