Search results
Results from the WOW.Com Content Network
The key danger for polar bears posed by the effects of climate change is malnutrition or starvation due to habitat loss.Polar bears hunt seals from a platform of sea ice. Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall.
Polar bear. 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 species is sexually dimorphic, as ...
e. Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. These impact marine ecosystems and food webs and may result in consequences as yet unrecognised for the biodiversity and continuation of marine life forms.
While hunting has long been an issue, global warming has done a number on polar bears' habitats recently. In fact, the World Wide Fund for Nature (or WWF) estimates that there are only 22,000 to ...
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 ...
This food source impacts the health of polar bears negatively. They also begin targeting unusual animals as prey. [43] [44] 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]
Fifteen years after polar bears were listed as threatened, a new study says researchers have overcome a roadblock in the Endangered Species Act that prevented the federal government from ...
The Agreement on the Conservation of Polar Bears is a multilateral treaty signed in Oslo, November 15, 1973, by the five nations with the largest polar bear populations: Canada, Denmark (Greenland), Norway (Svalbard), the United States, and the Soviet Union. [1] This treaty was brought about due to increased hunting of polar bears during the ...