Adult male polar bear (Ursus maritimus) on multi-year ice floes in Franz Josef Land, Russia, Arctic Ocean, Eurasia

polar bear ursus maritimus adult male arctic ocean ice floes wildlife arctic habitat bear movement natural behavior marine ecosystem cold climate eurasia wildlife observation conservation nature arctic wildlife habitat loss species adaptation ice conditions arctic region bear tracking polar regions biodiversity animal behavior ecosystems sea ice climate change arctic exploration natural environment frozen landscape arctic circle ice habitat ursidae mammal carnivore hunting grounds marine life snowy landscape bear population sensitive habitats northern hemisphere ice melting climate impact tundra ecological balance polar ecosystems arctic species remote landscapes arctic environment animal migration