(Tables 1,2) Tracking records and space use statistics of polar bears (Ursus ...

Arctic sea ice is declining rapidly, making it vital to understand the importance of different types of sea ice for ice-dependent species such as polar bears Ursus maritimus. In...北极海冰正快速消退，因此了解不同类型海冰对于北极熊（Ursus maritimus）这类海冰依赖型物种的重要性，显得至关重要。In...