Just prepared. North America is home to three species of bears. But because most of us aren’t likely to head out for a day hike in the Arctic, I’ll skip polar bears and focus instead on grizzlies (also known as brown bears) and black bears. • Grizzly Bears Range: Grizzlies have been eliminated from 98 percent of their native range in the American West and the Great Plains, according to the environmental organization Defenders of Wildlife. They’re now found from Alaska (the population
When they become overpopulated, the whole eco-system can be drastically affected. Native food sources can be depleted very quickly which can result in extinction. For example, the loss of cougars and wolves in much of the U.S has led to many species becoming over populated. Without the whitetail deer being hunted, there would be major crop damage and many more car versus deer accidents. Overpopulation often leads to disease and malnutrition.
Four kilometers of pine trees turned reddish-brown after the accident. This is where the name “Red Forest” was earned. Animals near the badly affected areas either died or stopped reproducing. The radiation caused numerous problems to humans as well, including Down's Syndrome, chromosomal aberrations, mutations, leukemia, thyroid cancer, and birth defects. Social & Economic Effect The tragic accident cost a huge sum of money.
3. Climate change has had several impacts on the animals of the arctic tundra. Polar bears, even though they hunt on ice and not on the tundra have seen their food supply decrease due to the melting ice. Since the polar bears can’t find food on ice they look for food in the tundra usually near humans which has led humans to have to shoot polar bears since they became too dangerous near humans. Also, since new species of plants have invaded the arctic some animals can’t adapt to them, like the Caribou which numbers have decreased.
Wasting Away Chronic Wasting Disease (CWD) is slowly eating away at much of the population of white-tail deer, moose, and elk in North America. CWD deteriorates the brain of an animal. It is infecting many of the deer in the Midwest and spreading all over the nation with a rapid pace. This horrific disease has been found as far north as Wisconsin and all the way down to New Mexico. There are many things that cause CWD, and it needs to be stopped before our white-tail deer population is considerably damaged.
In many areas, the wolves are nearly gone because they were killed by humans. Wolf recovery programs are reintroducing wolves to remote forests and many people such as ranchers are unhappy about these wolves. They say that the wolves will kill their cattle and sheep while others see the reintroduction as important in reestablishing a balance in nature. Dog history is as rich and varied as the dog breeds themselves. Research about their history indicates that all dogs originated from ancestral wolves, but careful breeding has created dozens of distinct breeds that highlight desired characteristics.
Why is the animal endangered? What are humans doing to affect the sustainability of this species? The Moon Bear is endangered from illegal hunting of the Moon Bear’s body parts, habitat loss from logging & athe main reason being because over Asia thousands & thousands of bears are on bear farms, kept in tiny cages, in order to get bile (a liquid in bears produced by the liver, that helps to digest the bears fat) from the gall bladders. Catheters (a metal tube) are implanted into the bears gall bladder (next to the liver in the abdomen), where the bile is drained up to twice a day. The procedure is very unhygienic & causes many infections where some bears die as a result.
Lipoczi 2 First of all, scientists blamed the climate change as one of the most potential reasons by that the mammoth could fade away. According to a journal, “Near the end of the ice age, as the ocean surface temperature cooled at mid and high latitude, and evaporation slowed, the equable ice age climate would have changed to a drier, more continental climate with more seasonal extremes” (Oard). It was
In my opinion I would said that the more methane is created the worse is for the planet since it would increase the temperatures. How methane is a real danger According to scientists, there were life in Alaska millions years ago, but as the winter came the animals froze and discompose, making methane to be created. Since the creation of methane it cause Alaska to be a timing explosive for the world’s climate. Methyl clathrates are the methane molecules of methane that are frozen down in the ice in the permafrost. If the temperature or the pressure changes, all the methane that is froze in the ice would escape.