The polar bear (Ursus maritimus) is a carnivorous bear whose native range lies largely within the Arctic Circle‚ encompassing the Arctic Ocean‚ its surrounding seas and surrounding land masses. It is a large bear‚ approximately the same size as the omnivorous Kodiak bear(Ursus arctos middendorffi).[3] A boar (adult male) weighs around 350–700 kg (770–1‚540 lb)‚[4] while a sow (adult female) is about half that size. Although it is the sister species of the brown bear‚[5] it has evolved to occupy a
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such as polar bears‚ wolves‚ and grizzly bears‚ caribou herds‚ snow geese‚ musk oxen‚ and dozens of other species. If your oil companies keep drilling in the Arctic‚ most of these beautiful creatures will die‚ and some will become extinct. The Coastal Plain is home to these animals. Annually‚ a herd of 129‚000 caribou gather on the Coastal Plain to bear and nurse their young. Polar bears rely on the Coastal Plain as their most important on-land denning habitat. Musk oxen‚ grizzly bears‚ wolves
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this pattern is expected to continue as climates everywhere changes and temperatures go up. As Earth warms up‚ the glaciers in the Arctic start to melt‚ and species such as the polar bear and the arctic fox that depend on the sea ice‚ will start to disappear and only be available for viewing in places such as zoos. The polar bear and the arctic fox are not just the only species that will be affected. The fish‚ birds‚ marine mammals‚ and even the algae that grows on the undersides of the glaciers will
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Administration within the Department of Commerce‚ is responsible for managing cetaceans‚ otariids‚ and phocids. The U.S. Fish and Wildlife Service‚ part of the Department of the Interior‚ is responsible for managing odobenids‚ sirenians‚ otters‚ and polar
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have a colder climate year round. We have three different types of biomes‚ temperate‚ tropical‚ and polar. Between the types‚ we have nine different biomes‚ tropical rain forest (tropical)‚ tropical savanna (tropical)‚ tropical deserts (tropical)‚ temperate forests (temperate)‚ temperate grasslands (temperate)‚ Chaparrals (temperate)‚ temperate deserts (temperate)‚ tundra (polar) and taiga (polar). The Tropical Desert gets less than twenty-five centimeters of rain yearly. Since this is a desert
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Bibliography: Björk‚ P. (2000)Ecotourism from a Conceptual Perspective‚ an Extended Definition of a Unique Tourism Form Chambers 21st century dictionary (1996) Cohen‚ E Dowsly‚ M. (2008) Inuit-organized polar bear sport hunting in Nunavut territory‚ Canada. Journal of Ecotourism 8(2‚) pp Holden‚ A. (2003) In need of new environmental ethics for tourism? Annals of Tourism Research 30 ( 1‚) pp King‚ D.A. & Stewart W.P. (1996) Ecotourism and commodification:
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------------------------------------------------- SBI4UB ------------------------------------------------- Key Questions – Unit 5 Ahmad Moussaoui 57. a) The Canadian population is still growing despite its low birth rate because of a few factors. Canada is a developed country‚ with advances in public sanitation‚ medicine‚ and public health. All of which give Canada a low mortality rate. Immigration also plays a big part in Canada’s population growth‚ as Canada is considered by many to
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One of the most southerly populations of polar bears in the world -- and the best studied -- is struggling to cope with climate-induced changes to sea ice‚ new research reveals. Based on over 10 years’ data the study‚ published in the British Ecological Society’s Journal of Animal Ecology‚ sheds new light on how sea ice conditions drive polar bears’ annual migration on and off the ice. Share This: 69 Related Ads: * Climate Change * See Polar Bears * Global Warming * Animals See Also:
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in the past decades as sea temperatures rise‚ causing reefs to “’collapse catastrophically’” (Markey). Colder regions‚ too‚ are feeling the heat. In the Arctic‚ shrinking sea ice is disappearing at a rate of 11% per decade‚ which has depleted polar bear habitats and shortened their winter hunting season‚ resulting in malnutrition and population decline(Dvorak). Meanwhile‚ on the opposite pole‚ the Antarctic Peninsula’s temperatures are rising even faster‚ spurring heavier snowfall and a dramatic
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Evolution of Polar Bears The observed fossil transitions that inform our knowledge of Polar Bear speciation are very well documented. Bear fossils change through time: generally‚ when examining the fossil record‚ successively deeper levels of sediments or sedimentary rocks yield successively older fossils. For some transitions from one species to another‚ one can find a well-characterized series of transitional specimens leading the observer across the species "boundaries" (Kurten‚ 1976). Sometime
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