majestic polar bear stands on vast ice floe, an imposing presence

majestic polar bear vast ice floe imposing presence arctic wilderness predator icy habitat circle conservation vulnerable species melting climate change ecosystem apex sea ursus maritimus regions snowy landscape wildlife environment powerful creature frozen tundra white fur marine mammal mammalian inhabitant snowcovered terrain global warming icebreaking skills solitary animal cold weather adaptation thick layer blubber unique food chain dweller endangered