Polar bears in southern Hudson Bay could go extinct by 2030s

"Polar bears in the southern Hudson Bay could go extinct as early as the 2030s because the sea ice that helps them hunt for food is thinning... Last month, the eastern half of Hudson Bay, home to the world’s most-studied polar bears, went ice free a month earlier than usual. Polar bears are used to an ice-free season of about four months when they rely on fat reserves until ice reforms and they can hunt blubber-rich seals... But the presence of sea ice doesn’t guarantee the bears will be able to hunt; it needs to be thick enough to support them... The concurrent loss of sea ice with depletion in snow cover significantly affects their preferred diet of ringed seals, which have a hard time keeping pups alive in their birthing dens if snow levels drop below 32 centimeters... “Beyond dealing with greenhouse gas emissions,” Dr. Derocher said, “there are no possible actions for long term management of the population.”"