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polar bears

science projeact

Hazel ize

on 27 March 2013

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Transcript of polar bears

Polar Bears!! Introduction Hello 711 and Mr. Dumyn. Today I will tell you about one of the endangered species. Polar Bears. My Science Project Habitat Threats to Animal Limiting Factors Sustainability of the Ecosystem Specific Species Traits Negative/positive human impacts Interesting Facts!! Polar Bears live in the far north called the Arctic. They have adapted to live on both water and on land. Unlike other bears, polar bears are excellent swimmers. Scientists estimated that Polar Bears can swim more than 100 miles away from the ice or land! Their main habitat is along the island of the Arctic region. Polar bears prefer to stay on the ice packs because they are close to their main food source, seals. When summer comes, and when the ice starts melting, Polar Bears swim many miles to remain on ice. Polar Bears that don't stay on the ice, when it begins to melt, they'll have to wait until fall to get back on the ice (very hard for them to get food). The polar Bear is officially classified as a "vulnerable" species (vulnerable- possibility of being attacked or harmed) There are 3 reasons of how the Polar Bear species might be extinct soon. The first one is global warming. Since Polar Bears hunt seals, they have to be on ice, but since global warming is increasing by a lot, it's causing the ice to melt. This is causing Polar Bears to migrate towards land and more to the North. The second one is pollution. Like any other species, Polar Bears are being harmed by pollution. The third reason is hunting. The hunting of the Polar bear is causing it to make a reduction in the polar bear species. However, since the 1950's agreements between countries have been made to stop hunting these species. This agreement made a huge reduction about hunting these innocent species. Polar Bears will need more help as their habitat keeps changes. The PBI team members are getting ready for the challenge to save polar bears. The arctic sea is shrinking and Polar bears experienced shorter hunting seasons. As the warmth continues, scientists predict that we will start seeing more starving or injured polar bears and orphaned cubs and also polar bears that are landlocked. The PBI team consists of zoo experts and biologists that are trained to rescue these species. The polar bears has any unique adaptions for dealing with the arctic cold. The polar bear's skin is actually black, which allows it to soak up as much heat as possible from the sun. Polar bears have fur that is made up of "hollow guard hairs". When Polar Bears are in a warmer climate, they can have algae growing inside the hollow guard hairs of their fur. This makes them have a greenish tint to their fur. These hollow hairs also keep their hair from matting down when they swim. (matting- keeps their hair puffy) - Did you know that an average of a male polar bear is about 8.5ft.! and an average adult female is 6.5ft
- polar bears don't drink water , but they get all their liquid from the animals they eat
- weight of an adult male is 900 lbs and an average female weighs 500 lbs
- a scientist once recorded a male weighing 2209 pounds. That's big!!
- Did you know that Pregnant females dig snow dens and stay there for 3-4 months, and they cant eat or drink and must live off fat reserves!! she stays with her cubs till they are about 3 months and then leave the den to hunt seals. (the mother would be very hungry by then) Future Prospects For Animals Survival In my opinion I don't think the Polar Bear species will survive because of our human actions, pollution, and green house gases. As of global warming polar bears will have a tough time hunting food when the ice is melting. Many polar bears can die just because of starvation. Scientists are predicting that the Polar bear species will be extinct before the year 2050, until people start caring about these innocent animals. It's not to late to take action to save sea ice and polar bears by greatly reducing greenhouse gas emissions. Some of the things we can do to save these arctic animals are: ride a bike or walk, use public transportation, use no more water than needed, buy and cook only what you will eat, dont waste food and always reduce, reuse, and recycle. People have hunted polar bears for food, clothing, bedding, and religious purposes. Kills of the Polar bear have increased in the 1950's and 1960's when hunters began using snowmobiles, boats, and airplanes to hunt polar bears. For the last several decades, hunting has been the greatest cause for the decreasing of the polar bears. Today, polar bears are hunted by native arctic populations for food, clothing, handicrafts, and sale of skin. Hunting is currently banned in Norway and parts of Russia. Thanks for watching. I hope you learned something new about Polar Bears! Heavy ice and very cold weather have been a limiting factor for polar bears, heavy ice makes it harder for them to hunt. The Polar Bears movements over ice floes make birth, and death an extremely harsh task. Biologists estimate between 20,000 and 25,000 total Polar Bears living on earth. They range across the borders of Alaska to Russia, from Canada to Greenland, and into Norway. Scientists believe 60 percent of these Polar Bears live in Canada. They are listed as "Vulnerable" according to the IUCN Red List. Russia and Canada have also listed the Polar Bears as a "Species of Concern". Recent studies show a 22% decline in populations in the Canada's Western Hudson Bay populations, since the early 1980's. Bibliography Bibliography 1. http://polarbearsinternational.org/forstudents/polar-bears-for-kids
2. http://www.arctic.noaa.gov/essay_schliebe.html
3. http://www.seaworld.org/animal-info/info-books/polar-bear/longevity.htm
4. https://www.google.ca/search?q=polar+bear+population&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
5. http://endangeredpolarbear.com/polar_bear_habitat.htm
6. http://www.polarbearsinternational.org/our-work/research-programs/sustainability-alliance
7. http://worldwildlife.org/species/polar-bear
8. http://library.thinkquest.org/3500/polarbear.htm
9. http://en.wikipedia.org/wiki/Polar_bear
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