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Polar bear and climate change research paper
Global warming negative effects to the ecosystem
Greenhouse effect affect the environment
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Have you ever seen a Polar bear? Maybe you saw them on tv ads, if you watch tv sometimes. I’m talking about Coca-Cola ads. Where there are white polar bears that are drinking Coca-Cola on a sea ice. I think that not only me but also you as well would like to see a polar bear in our lifetime. Well, they don’t drink Coca-Cola, but their main food is ring seals. They usually live in the North Pole and South Pole or in the Arctict Ring. im gonna to talk about the North Pole’s polar bear because all of the data talks about them. Today, polar bears are listed as endangered animals and every year many polar bears are decreasing rapidly. Then, I know why they are declining after I read the articles. “There is a definite link between changes in the …show more content…
First, the government should help to make places at the zoo to take care of polar bears, because cost to make places for polar bears is too expensive. It is good not only for polar bear but also for humans, because people can see real polar bears. Then, when we rescue polar bears that are in danger, we need a place for them. Only government can make professional place easily. It’s a big deal for an individual. Also, polar region is so small for polar bears because sea ice is melting rapidly. If we don’t make a place for them, they will face a shortage of food. Thus, the government has to make a shelter for polar bears and people also should help government to pursue it without …show more content…
They also say that greenhouse effect isn’t dangerous and it’s natural with short-term records. However, it will cause bad results and it’s not natural but clearly destruction of ecosystem. Polar bears occupy big parts of ecosystem, so if they are disappeared, many other species can get critical damage. Then, greenhouse effect will destroy the Arctic sea ice and polar bears will be dead. Then, it also causes many big problems, even if it affects humans. Actually, the sea level rising is one of the biggest problems. It can hurt human directly. Although it looks like a natural situation, it’s a very serious problem. “Only a third of the world’s polar bears may be left within 50 years because of thinning ice from global warming in the Arctic” (Heilprin, 2007, par. 1). It’s too fast reduction, and Polar bears’ reduction is related with many things. Therefore, the government and people should try to make sense of this dangerous situation. Then, we have to make moderate methods to protect
To begin with, the melting of polar ice caps has caused polar bears to swim long distances. According to Bryan Walsh of TIME Magazine the melting of the ice caps have caused polar bears especially the young cubs to swim longer distances which has caused a “ forty-five percent mortality rate” (Walsh). In the article Walsh, writes about a study that showed that younger cubs because of low fat and strength were more likely to die due to the long di...
The grizzly bear trophy hunt is an issue regarding the citizens of Canada who immorally hunt and kill grizzly bears for pride, thrill, and trophy. Many people question whether this is morally acceptable as hunters kill without a conscience. Grizzly bears are vital to Canada’s environment as they are essential to maintaining a healthy ecosystem. As keystone species, they regulate prey, disperse seeds of plants,and aerate soil to maintaining forest health. Due to the vulnerability and over-hunting of grizzly bears, Pacific Wild and many other non-profit organizations, are working to protect wildlife in British Columbia, especially the grizzly bear habitat.
Out of an Ice Age emerged one of our most majestic creatures in the world the polar bear. From its brown bear ancestry, the predator evolved to be a master of a harsh and unwelcoming ice kingdom. Intelligent, adaptable and fierce, the polar bear learned how to survive in a place that offers few comforts to any creature. But now that very environment is in flux. And so is the polar bear’s fate (Nature). Polar Bears are very different from other bears. Polar bears are very large bears compared to Black bears. Polar bears weigh anywhere between 330-1700lbs and Black bears weigh anywhere between 150-600lbs. They have strong legs with large, flattened feet with some webbing between their toes that help with walking on ice and swimming. The wide paws prevent sea ice from breaking by distributing weight while walking. Their paws allow them to pull a 600 pound seal out of its breathing hole (Rosing, 20). The webbed feet results in making polar bears, unlike other bear species to be considered as marine mammals along with seals, sea lions, walruses, whales and dolphins (Polar Bear). According to Rosing Polar bears are excellent swimmers and have been known to swim up to six miles an hour and as far as 60 miles at a stretch. The bears paddle with their front feet and steer with their back feet. They often overheat. Sometimes they venture into the waters just to cool off. When a bear climbs on an ice floe, it shakes itself off because it is trying to prevent ice from forming on its fur (22-23). Because of climate change and hunting of polar bears are now becoming an endangered species which is affecting the food chain. We can fix this by going green, banning polar bear hunting and keep creating these new hybrid bears that are mixed with griz...
* Polar bears are members of the bear family Ursidae. They are a carnivorous bear which can be found throughout the Arctic region where they rely on sea ice to sustain their hunting activities. Canada hosts approximately 60% of the polar bear population. Other areas inhabited by polar bears include Alas...
In recent decades, the global warming threat has captured the attention of the nation and the world. While the main focus began with concentrating on the effects this long-term natural crisis would have on the human population, select groups have worked to approach the topic in a manner that entails prevention in order to help other animal and plant species around the globe. One such organization is the National Oceanic and Atmospheric Administration, which has played a major role in the conservation of the polar bear species, one of the mammals most adversely affected by the recent climate changes. As more research has been conducted regarding the polar bears, scientific name Ursus Maritimus, the conclusions have been shocking. In 2008, the Department to the Interior listed the polar bear species as “threatened” under the Endangered Species Act of 1973 awarding it some protections mandated by the federal government (Wolfe). However, on January 5, 2011, Representative Donald Young proposed a bill in Congress in order to delist the polar bears as threatened, thus decreasing and even removing the conservation efforts that have been set in place over the past three years. The polar bear Species should remain listed under the Endangered Species Act because ice thickness has decreased 40 percent during the past 30 years thus reducing the polar bears’ critical environment, if current conditions continue the polar bear populations around the world may decrease by two thirds by mid century, and since the species has been protected under the Endangered Species Act the worldwide populations have experienced stabilization or growth in most circumstances.
Polar bears don't just live on ice, they use the ice as an advantage to catch prey such as seals. Polar bears have adapted to living on ice and being able to withstand the cold weather. Now that the climate is changing at a fast pace, polar bears are losing their land because its melting, leaving them with no place to walk, sleep and taking away their way of hunting prey. (polar bears international, 2015) This is all happening so fast that there is no way polar bears will be able to adapt to the new environments, causing extinction. The arctic is warming twice as fast as the rest of the world is due to the build up of greenhouse gases in the atmosphere, making it a problem happening very rapidly. (Bagley, 2015) Temperatures in the Arctic region have risen 7 degrees Fahrenheit over the last half century. (Bagley, 2015) Population among polar bears has decreased up to 40% in some areas. (Bagley, 2015) With the climate getting warmer, ice is melting earlier every spring, and takes longer to freeze every winter which is disrupting the feeding and breeding cycles of many different arctic species. (Bagley, 2015) Polar bears have adapted ways to survive in the cold harsh arctic environment including having the ability to cool down their outer skin to keep their vital organs warm when they are submerged in cold water. Though this may help the delay of hypothermia as they have to swim greater distances from ice shelf to ice shelf, that doesn't mean polar bears can swim forever. (Bagley, 2015) One bear that a scientist studied swam 500 miles over nine days, but lost 22% of her body weight, and lost her cub.(Bagley, 2015) Many different scientists have been studying the behaviour of the polar bear to see if it could adapt in any way to survive. Eight U.S scientists made a hypothesis consisting that polar bears could lower their metabolic rates enough to survive as food
The habitat is also made up of trees with nuts and bushes with berries. Black Bears are omnivores so they eat these along with other small animals. They are opportunist when it comes to food. Mostly bears eat vegetation during the spring but they will eat mainly anything they encounter. During the summer the bears eat salmon out of the rivers if they can catch it. If they can’t catch any they mainly survive off of berries, mainly blueberries, ants, grubs, and other insects. In the fall their diet starts to shift and they start to save up food for winter. They are also known to eat newborn moose calves during the winter when food is scarce.
The Arctic region is home to a variety of valuable animals and plants, including polar bear, seal, and so on. The ecosystem of the Arctic region is fragile because these animals are evolved to live in extreme conditions. With the climate change, many animals are endangered. Ice is the habitat of polar animals because they have to rely on sea ices for resting, food, and reproduction. With the climate change and the decrease of sea ice, the number of polar animals is decreasing and their health is threatened. For example, the average weight of female polar bears in 1980 was about 650 pounds, but the number reduced to about 500 pounds in 2004 (Djoghlaf 15). The earlier breakup and later condensation of sea ice shortens the hunting season of polar bears. Polar bears mainly feed on seals that indwell icy land. The melting ice reduces the number of seals and food intake of polar bears. In addition, polar bears are used to living in ice caves. The rising temperature causes the collapse of ice caves, which can kill baby bears. The climate change is negatively affecting the biodiversity in the region and will definitely harm the ecosystem
Scientists appear to have become aware of the issue of rising sea levels in the mid to late 1980s. An article published in Science News in 1987 predicted that “global warming… will cause… the world's oceans to expand, raising the average sea level by 4 to 8 centimeters in the next 40 years” (Monastersky). Though 4 to 8 centimeters sounds like a miniscule amount in relation to the vastness of the world’s oceans, this early article disturbed many readers. Many for this reason: early stud...
They use their powerful sense of smell when hunting for seals, their main source of food. They can smell a seal’s breathing hole, or aglu, up to one mile away. Once located, a polar bear will wait patiently by the hole and attack the seal’s head when it comes up for air. In ideal hunting conditions, the bear will just eat the seal fat, leaving the carcass for other animals. These are some of the ways that the polar bear are able to survive, and this leads me onto our next topic about how the polar bears
The global sea level rose about 17 centimeters (6.7 inches) in the last century (NASA). The rate in the last decade, however, is nearly double that of the last century. With climate change on the rise, higher temperatures, more droughts, and wilder weather will prevail. These changes will affect animals, ecosystems, and people.
Polar bears prefer to live in extremely cold artic climates. They live only in the Northern Hemisphere, on the arctic ice cap, and they spend most of their time on coastal areas. Polar bears are widely spread in Canada, extending from the northern arctic islands south to the Hudson Bay area. They are also found in Greenland, on islands off the shore of Norway, on the northern coast of the former Soviet Union, and on the northern and northwestern coasts of Alaska in the United States.
The world population of polar bears is currently dwindling and is currently 20,000-25,000 and is split between 19 sub-populations (Effects of climate change on polar bears, 2010). Brown bears are found in Russia, Scandinavia, Europe, North America and Asia. Americans use the term “grizzly” to refer to the smaller lighter coloured bear in the interior parts of North America, whereas “brown bear”, are generally thought off as the larger, darker variation living close to the coast and feeding on salmon (http://www.nwf.org/Wildlife/Wildlife-Library/Mammals/Grizzly-Bear.aspx, n.d.). Brown bears and polar bears are different species and therefore according to the biological species concept should not be able to produce viable fertile offspring. Polar bears have evolved from brown bears between 100,000 and 200,000 years ago (Reece,J, 2010), and can to some extent be looked upon as a white brown bear (Höflinger,L, 2012).
The polar regions are most affected and vulnerable to the warming temperatures because the poles are covered in ice. The world’s ice sheets are melting faster than ever and temperatures in the Arctic region are rising twice as fast as anywhere else on Earth according to the NRDC. This will have a serious impact on people, wildlife and plants in that region. The National Climate Assessment has said that “By the year 2100, it 's estimated our oceans will be one to four feet higher, threatening coastal systems and low-lying areas, including entire island nations and the world 's largest cities, including New York, Los Angeles, and Miami as well as Mumbai, Sydney, and Rio de Janeiro”. Polar bears are in great threat as the ice sheets melt because they use the ice to travel across the land and hunt. As the sea-ice platforms move further apart, the swimming conditions become more dangerous. The U.S Geological Survey done by the National Wildlife Federation predicts that by the year 2050, two thirds of all polar bears will disappear. Researcher Bill Fraser has tracked the Adelie penguins in Antarctica and reported the numbers have fallen from 32,000 to only 11,000 over the last 30
Global warming is a serious problem with two major effects: increasing sea level and degradation of wildlife. Increase in sea level affects the entire landmass of the earth. According to NASA, the polar ice cap is melting at the alarming rate of nine percent per decade. Arctic ice thickness has decreased 40 percent since the 1960s (Oskin). The amount of water is more than the land on our planet.