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Why are polar bears endangered [Copy link] 中文

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This post was edited by senoritazhao at 2017-3-19 15:38

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Things at the moment really aren’t great for polar bears. They face many challenges as their natural habit changes due to the effects of global warming and increasing human involvement. The lives of polar bears have already been changed by the advancing world we live in and polar bears are struggling to cope with this new world. Because of this polar bears are now classified as a vulnerable species with eight of the nineteen polar bear sub populations in decline.

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1. Global Warming

One of the biggest challenges faced bypolar bears is how they are going to adapt to the global warming being seen inthe world. While it might be easy to think that the rising temperatures arethreatening the polar bears by causing them to overheat, this is not the majorchallenge that global warming presents to them. The worst impact global warmingis having is the destruction of the habitat polar bears need to hunt andsurvive.

Polar bears main source of food are sealswhich polar bears hunt by finding them in sea ice. As global temperatures risebecause of global warming this sea ice is melting earlier in the year. Thismeans that the polar bears have less time in the year to fatten up to preparethemselves for long periods of being on land where polar bears typicallystruggle to find food.

This lack of food also hurts the polarbears ability to have children. As the polar bears are less well fed they tendto have less children which causes polar bears to become more vulnerable withevery generation.



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This post was edited by senoritazhao at 2017-3-19 15:46

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2. Pollution

While global warming is a major challengewhich is facing polar bears it is not the only challenge that they face. Polarbears also have to deal with the challenges faced by an increasingly pollutedworld.


Polarbears are very vulnerable to pesticides which often find their way into theoceans and the habitats in which polar bears live. They are very vulnerablebecause they are the dominant animal in the Arctic. Polar bears feed on theother animals in their habitat to survive. This means that they end upcollecting up all the pollutants which the other animals have been exposed too.Because of this polar bears are the most highly polluted animals in the Arctic.


Polarbears are also at risk of oil pollution if there was an oil spill at one of themany oil stations now working in the Arctic. Oil spills collect around theareas of sea ice which polar bears use for hunting. The oil can damage the furof the polar bears. This being the fur that the polar bears use to keepthemselves warm. When this fur is damaged by the oil the polar bears struggleto keep warm and can die from hypothermia.


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3. Hunting


Traditionally polar bears were hunted invast quantities. This has died down recently as the world community has reactedto the vulnerability of the polar bears by banning hunting outright orinstalling quotas on the number of polar bears that can be hunted per year.

Howeverthe law can only help so much and much illegal hunting still takes place.


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