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The key danger for polar bears posed by the effects of climate change is malnutrition or starvation due to habitat loss.Polar bears hunt seals from a platform of sea ice. Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall.
The polar bear is featured on flags and coats of arms, like the coat of arms of Greenland, and in many advertisements, notably for Coca-Cola since 1922. [201] As charismatic megafauna, polar bears have been used to raise awareness of the dangers of climate change. Aurora the polar bear is a giant marionette created by Greenpeace for climate ...
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In fact, polar bears remain one of only a few large carnivores still found in their original habitats in roughly the same numbers. But global warming still puts polar bears in a dangerous situation.
Map from the U.S. Geological Survey shows projected changes in polar bear habitat from 2005 to 2095. Red areas indicate loss of optimal polar bear habitat; blue areas indicate gain. Habitat degradation is caused by a number of human activities. Marine mammals that live in coastal environments are the most likely to be affected by habitat ...
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Projected change in polar bear habitat from 2001–2010 to 2041–2050. Arctic warming negatively affects the foraging and breeding ecology of native Arctic mammals, such as Arctic foxes or Arctic reindeer. [91] In July 2019, 200 Svalbard reindeer were found starved to death apparently due to low precipitation related to climate change. [92]
In the 1980s, polar bear biologist Andrew Derocher never saw weak, gaunt bear cubs sauntering along the shores of Canada's frigid Hudson Bay. Then, beginning around 2000, he sometimes spotted ...