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Polar bears |
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Today I attended a lecture on how climate change and other factors are affecting the polar bears adversely. These are some of the notes I took. . The polar bear, also known as the white bear, northern bear, or sea bear, is a large bear native to the Arctic. It is one of the two largest land carnivore species and the top predator within its area. It is well adapted to its habitat: it has thick blubber and fur to insulate to it against the cold as well as white colored fur that camouflages it from its prey. The polar bear hunts well on land, on the sea ice, as well as in the water. The polar bear is a circumpolar species found in and around the Arctic Ocean whose southern range limits are determined by pack ice. Their southernmost point is James Bay in Canada. While their numbers thin north, there is evidence of polar bears all the way across the Arctic. Population estimates are generally just over 20,000. The destruction of its habitat on the Arctic ice, which has been attributed to global warming, threatens the bear's survival as a species it may become extinct within the century. Signs of this have already been observed at the southern edges of its range. . The key danger posed by climate change is malnutrition or starvation due to habitat loss. Polar bears hunt seals from a platform of sea ice. Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall.. . Polar bears accumulate high levels of persistent organic pollutants such as polychlorinated biphenyl (PCBs) and chlorinated pesticides. Due to their position at the top of the food pyramid, with a diet heavy in blubber in which halocarbons concentrate, their bodies are among the most contaminated of Arctic mammals. |
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16 Comments
Thank you for sharing.
Posted 27-08-2013 13:21
Geetika, we must preserve all animals incl polar bears.
Posted 10-06-2013 21:28
Christy: ya, it was so much fun :)
Posted 20-05-2013 23:21
Everland!! Where we were together :D
Posted 20-05-2013 09:36
Christy: thank you :D :)
Posted 18-05-2013 22:36
Dhiroj : thanks :)
Posted 18-05-2013 22:36
simran: thank you, this picture was taken at the everland! the other polar bear seemed to be quite disturbed due to the crowd!
Posted 18-05-2013 22:35
Pratap: thank you :)
Posted 18-05-2013 22:34
Arushi : thank you dear.
Posted 18-05-2013 22:33
Kehkashan: thank you.
Posted 18-05-2013 22:32
It's very informative. Thank you for the knowledge sharing :D
Posted 16-05-2013 13:21
Thanks for this interesting article.
Posted 16-05-2013 12:30
Very cute Picture Geetika and great content too
Posted 16-05-2013 03:07
nice article, thank you for sharing this..
Posted 15-05-2013 20:33
Well said Geetika , Humans are disrupting animals' lives in big way.
Posted 15-05-2013 20:31
Very interesting!
Posted 15-05-2013 19:52