Due to the climate change, the ice-free season on the Western Hudson Bay is increasing. This will reach its peak soon, thereby decreasing their population of polar bears. According to biologist Ian Sirling in University of Alberta, the polar bears will be disappeared in Hudson Bay within 25-30 years (Bartley 2010). The polar bears hunt seals on the sea ice to gain enough their body mass to stay winter time, but a longer ice-free season lead to that polar bears have been deprived of hunting ground and be in want of food to survive. This is problematic because female polar bears can produce underweight babies or no babies. (Kives 2010).
Is there any other impact on polar bears due to the climate change other than decreasing population? If yes, is this helping them to stabilize their population or not?
The first journal provided data that climate change causes the changes on Polar bears interns of their food. Snow goose in Hudson Bay have their nesting period prior to polar bears arriving time. However, losing ice brought their arriving time in ashore forward. Thus, it is overlapping the nesting period of snow goose. Therefore, weary polar bears from their long swimming journey eat snow goose eggs before they hatched seals. This can help Polar bear to survive in some stages and also stabilize the population (Rockwell and Gormezano 2010). The second journal indicated that they projected that losing sea ice will impact on losing polar bear’s habits as melting ice is on around of ice pack where the polar bears prefer to live. It is obvious that reduction of ice leaded to losing polar bear habits. However, it does not mean their population is also reduced due to losing ice as it is seasonal and only impacts specific bears and habits. In addition, the Western Hudson Bay in Canada is still considered as rich environment for polar bear, therefore, will have the greatest likelihood of population in the future (Durner et al. 2009).
Analyzing all the evidences provided from journal articles indicate that losing ice will affect not only their population but also their food and habits changes. According to Kives (2010), polar bears are in lack of food so that their population will decline as they cannot store their body mass. However, in the research conducted by Rockwell and Gormezano (2010) suggested that other food resource like goose eggs plays an important role in surviving of polar bears. Also, although climate change effected their habits, they projected that more polar bears will be in Hudson Bay where is the rich environment for polar bears. These evidences indicate that even though the message in newspaper, there are other impact on stabilize the population of polar bear.
Although it is true that the population of polar bear have been declined generally, may not have a rapid dropping particularly in Hudson Bay. It is because other food sources like goose egg are provided and their habits changes to better environment where is Hudson Bay.