8. What are the biggest threats to polar bears? The is the biggest threat to the survival of polar bears. Because of ongoing and potential loss of their sea habitat resulting from climate change, polar bears were listed as a threatened species in the US under the Endangered Species Act in May 2008. Other key threats include polar bear-human conflicts, overharvesting and industrial impacts. As climate change forces polar bears to spend longer time onshore, they come in contact more often with Arctic coastal communities and others working in the Arctic. in the Arctic are expected to increase in number.
This would likely affect polar bears and their habitat in many ways. Contact with spilled oil would be fatal for polar bears and an oil spill would affect the entire food chain.
hile polar bearвs white fur camouflages it into the white snowy background its black skin primarily serves to keep the bear warm nearly all the time. The reason why polar bears have black skins is that black color (as you probably know) absorbs heat and sunlight inasmuch as they can.
That is why most people usually do not wear dark-colored clothes in summer. Now let us study in detail as to what color skin do polar bears have. Why Do Polar Bears have Black Skin? Polar bears inhabit one of the coolest places on planet earth. Like most other Arctic mammals, polar bears have quite many adaptations to survive the freezing cold of the North. One such useful adaptation is a bearвs black skin. The polar bearвs skin soaks up as much sunlight as it possibly can and so it keeps the animal warm.
Read More: Why are Polar Bears White? The polar bear s black skin is quite visible under its white fur. Why do polar bears have black skins? Photo by Black color generally does not reflect light, it absorbs the light. Polar bears live in Canadian Arctic as well as Denmark, Russia, Norway, and Alaskaвplaces where sun doesnвt shine like in Southern Hemisphere. Thus, it turns out to be extremely effective feature in absorbing the available sunlight. Why Do Polar Bears have Black Skin? Video п