How humans are responsible for polar bears loss of habitat?
The primary concern is the loss of sea ice. This would remove essential habitat, for both the bears and their marine mammal prey. Increasing numbers of drowned polar bears have been reported, the result of increasing areas of open water between ice floes, presumably leading to overexertion during swimming.
What will happen to polar bears if the ice melts?
A 2020 study found that the melting sea ice is starving polar bears, and that within the century, polar bears could be extinct. As stated in the study, declining genetic diversity increases the risk of extinction.
How much has the polar bear population decreased?
Today’s study, published in Ecological Applications, analyzed data on polar bears in northeast Alaska and the Northwest Territories and documented a 40 percent population loss between 2001-2010 from 1,500 to 900 bears. Climate change is the main threat facing polar bears.