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The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed.The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb).
The creation of the Arctic National Refuge is an example of a measure being enacted to protect the North American tundra. The Arctic Refuge was originally created in 1960 by the Public Land Order 2214, which was created "for the purpose of preserving unique wildlife, wilderness, and recreational values" and "withdrawn from all forms of ...
This food source impacts the health of polar bears negatively. They also begin targeting unusual animals as prey. [45] [46] The Arctic National Wildlife Refuge is the only refuge that regularly dens polar bears in that local region, and contains the most consistent number of polar bears in the area. [citation needed]
The American black bear is restricted to North America, and the polar bear is restricted to the Arctic Ocean. All the remaining species of bear are Asian. [ 58 ] They occur in a range of habitats which include tropical lowland rainforest, both coniferous and broadleaf forests, prairies, steppes, montane grassland, alpine scree slopes, Arctic ...
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For animals, there has been a decrease in the number of polar bears in the Hudson Bay area. [36] Since 1981, the polar bear population has been declining. This is because global warming causes the ice to break up faster so the polar bears are going to the coasts when there are poor conditions. [36]
Arctic ecology is the scientific study of the relationships between biotic and abiotic factors in the arctic, the region north of the Arctic Circle (66° 33’N). [1] This region is characterized by two biomes: taiga (or boreal forest ) and tundra . [ 2 ]
An isolated group of polar bears living in southeast Greenland has surprised scientists with its ability to survive in a habitat with relatively little sea ice. Polar bears face existential threat ...