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Climate change is stretching the length of time parts of the Far North go without sea ice, which polar bears rely on to hunt their preferred prey: blubbery, calorie-rich seals. When the ice melts in summer, the bears move onto land and face two options. They can rest and slow down to a state approaching hibernation, or they can forage for alternative food like berries, bird eggs and small land animals. Scientists tracking 20 polar bears in Manitoba, below the Arctic Circle at the southern end of the animals’ range, found that the option the polar bears chose didn’t make much difference. Scientists estimate that, going forward, there will be five to 10 more days without sea ice each decade.
Persons: didn’t, , Anthony Pagano Organizations: U.S . Geological Survey, Nature Communications Locations: Manitoba, Hudson Bay
For polar bears, the climate change diet is a losing proposition, a new study suggests. With Arctic sea ice shrinking from climate change, many polar bears have to shift their diets to land during parts of the summer. Usually polar bears eat high-fat seals while based on sea ice, near where the seals are. The United States Fish and Wildlife Service lists polar bears as a threatened species “due to the loss of its sea ice habitat." When polar bears have sea ice, they feast on seals.
Persons: Anthony Pagano, fatten, Pagano, Andrew Derocher, ” Derocher, , Derocher, Karyn Rode, , ” Rode, Kristin Laidre, Laidre, Stephanie Windeler, ___ Read, Seth Borenstein Organizations: Nature Communications, Geological Survey, Data, United States Fish and Wildlife Service, University of Alberta, University of Washington, Canada, International Union for Conservation of Nature, Associated Press Locations: U.S, Hudson, London, AP.org
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