Global Warming Endangers the Lives of Grizzly Bears :: Exploratory Essays Research Papers

Global Warming Endangers the Lives of Grizzly Bears There are slight then 1000 gray-haired bears left in the lower 48 United States, around 400 of them live in Yellowstone National Park. These endangered, and beauteous bears, are threatened by many factors, most significantly the atomization of their habitat by roads. The latest threat to this species is the Global Warming course that is threatening the unclouded Bark Pine tree, which is very important to the grizzly bear diet.Grizzly bears need to eat a great spot of fat in the fall in order to prepare for hibernation. egg-producing(prenominal) grizzlies who dont get enough fat may develop fertility problems. ovalbumin Bark Pine trees produce pine nuts that are considered to be the grizzly bears favorite food and provide up to 40% of the fat they need.Global Warming threatens the gaberdine Bark Pine in both ways. First it reduces the area in which the trees can puzzle. They depend on a cool, alpine habitat, so as the c limate warms they are forced to grow higher on the mountains. Since mountains are conical the higher they go, the less piazza there is for them to grow.Second, the warming climate creates fog banks in which European flog Rust thrives. European Blister Rust is a plant distemper that was accidentally introduced into the Pacific Northwest in 1906. Blister Rust girdles the infected tree, eventually killing it. Since the introduction of this disease more than 98% of White Bark Pine stands in the northwest corroborate been destroyed.In upstart years Blister Rust has been noted getting close together(predicate) and closer to Yellowstone Park. White Bark Pine stands in Waterton Lakes National Park, Alberta and Blackfoot Reservation, Montana entertain suffered serious declines. Nearly 30% of the White Bark Pines in these areas have been killed and more than 70% of the remaining, living trees are infected. In the past 5 years Blister Rust has been seen in Gallatin National Forest, jus t southmost of Yellowstone, where Yellowstone grizzlies often forage for food.How does this threat to the White Bark Pine Tree also threaten Grizzly Bears? In two ways. First since the White Bark Pine Tree provides as much as 40% of the fat requirement of grizzlies, the loss of the White Bark Pine forthwith threatens the fertility of female grizzlies. With only 400 grizzlies living in an spaced pocket around Yellowstone Park, a threat to their fertility is a enceinte threat to their very existence.