The study also showing polar bears adapt to a polar environment in the hundreds of years. Now, the problem of adjustment of the polar bear Was a challenge as climate change takes place in a relatively fast.
If no carbon emissions, global temperatures will continue to happen. This allows the bear is not sufficient to adjust. The worst result is a polar bear will become extinct.
Recent studies by Frank Hailler of biodiversity and the Climate Research Center is performed by analyzing mitochondrial DNA, a small part of the whole genome Inherited from the mother. Hailler concluded that polar bears are brown bear family from the north.
Hailler say, polar bears age suggests that this species has undergone several cycles of glacial and spent a long time to adapt to the arctic environment. "However, the low genetic diversity in polar bears suggests that environmental changes, such as the warm phase, resulting in a narrowing of the population (population bottlenecks)" Hailler said in a paper published in Science on Friday (04/19 / 2012).
Change of habitat, poaching may, toxins and other stresses caused by people increase the impact of climate change today. It also threatens the polar bear population.
