北极熊课题__英语ppt.ppt

北极熊课题北极熊课题__英语英语pptOne animal,with its thick fur and layer of heavy blubber.---------the polar bear vNear the edge of Artic region of Canada,the short summer is being chased away by a constant cold wind from the north.Along the western shore of the Hudson Bay,winter is beginning to close its grip.vPolar bears are built for winter, they’re built for the cold.vThese marine mammals spend most of their lives on frozen seas,and they depend on the frozen ice packs for hunting.but these polar bears don’t enjoy the luxury of an uninterrupted winter.CAM ELLIOT:vWhen the Bay nelts, the bears are forced to shore.Nikita Ovsyanikow:vWhat is especially attractive in polar bears in terms of conservation, it is a well….. We say ‘umbrella species’. It’s a large predator which is the top of food chain in the Arctic.Johiy Bykerk:vThey are hungry.Unless they’re lucky enough to find some dead beluga whale or dead seal,perhaps that’s washed up on the shore .They’re essentially gone four months at this point without having a bite to eat.vScientists are concerned that despite the constant cold in Northem Manitoba, it may not be staying cold long enough to keep the environment stable.。