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Polar Bear Makes the List





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Endangered Species - The Polar Bear

Did you know that the Arctic is warming faster than any other place in the world? Find out what this means for our polar bears in this lesson.

Endangered Species Pre-reading Vocabulary

Word Meaning
conservation effort noun measures to protect and restore the natural world
ecosystem noun the ongoing relationship between living things and their environment
endangered species noun animals or plants that are likely to go extinct
environmentalistnoun a person who cares about the natural world and makes an effort to protect it or raise awareness for its needs
extinction noun the loss of a species in this world
food chain noun a group of organisms that feed off of each other
global warmingnoun the gradual increase in temperature on earth
habitat noun the area where a species naturally lives, eats, and reproduces
recover verb to help a certain species repopulate an area
reforestationnoun the planting and growth of new trees
risk verb engage in a dangerous act
vulnerableadjective likely to face injury or danger
wildlife noun plants and animals living in a natural environment

Polar Bear Makes the List

In Spring 2008, the polar bear was placed on the endangered specieslist. According to the Endangered Species Act, an endangered species is an animal that is likely to face extinction in its natural habitat. Polar bears have been categorized as a "threatened" species. The ESA defines a threatened species as one that is likely to become "endangered" in the foreseeable future.

The polar bear is the first animal that has been classified as endangered due primarily to global warming. Global warming is caused by carbon dioxide and other greenhouse gases that become trapped in the atmosphere. Heating homes, driving cars, and burning garbage all require fossil fuels that lead to global warming.

The polar bear's habitat is more vulnerable to global warming than many other species. Polar bears live mainly on the sea ice in the Arctic. This is where they hunt for fish and build up fat reserves. When the ice melts many polar bears move to land and live off their stored fat. In the Arctic, global warming is causing the ice to melt slightly earlier and form slightly later. This results in a shorter feeding season for the polar bear. Some risk their lives to find ice. If they have to swim too far they will drown from exhaustion and hunger. The World Wildlife Fund estimates that 25% of the Arctic sea ice has disappeared in the past 30 years.

It is not only the polar bear that is at risk in the Arctic. Every species of plant, animal, and insect there is threatened by global warming. Nevertheless, environmentalist groups such as the World Wildlife Fund often study large carnivores in order to assess the health of anecosystem. The Arctic food chain relies on the polar bear. In addition, donations are more commonly offered for the protection of large animals such as bears or elephants. People in general are less interested inconservation efforts that protect small wildlife, such as plants or insects. However, by using donor money to protect the habitat of the larger animals (ex. reforestation programs), entire ecosystems can be protected.

It is important that animals such as the polar bear make it onto the endangered species list. Once they are on the list there are laws that protect these animals from being hunted for food or sport. Agencies also receive money and tools to protect the habitat and recover the species. The goal of removing the animal from the list is often achievable. Since the Endangered Species Act was introduced in the US in 1973, many species have been taken off the list due to increased populations. In fact, it is rare for a species to go extinct after they make the list. Sadly many species do go extinct while waiting for consideration.

 

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