The last two decades polar bears have become an alarm or early marker of the impacts of climate change. Because the survival of this species is very dependent on the melting of ice in the world.
Recently, polar bears in Southeastern Greenland have been observed to show adaptive behavior in their hunting practices in the midst of increasingly warming Earth conditions due to climate change. This offers a glimmer of hope for the survival of this Arctic native species.
Hundreds of polar bears living on Greenland’s southeast coast cleverly use the smaller pieces of sea ice formed from glaciers as a medium for hunting seals. Usually all this time they used icebergs in the middle of the sea or giant ice fragments that floated from the Greenland ice sheet.
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Polar bears in the Arctic have depended on icebergs in the middle of the ocean for hunting. Increased greenhouse gas emissions and global temperatures make the icebergs in the middle of the sea continue to melt and eventually disappear from the surface. As a result, polar bears have to travel longer distances to find the next iceberg, while their food supply continues to dwindle in the winter.
Polar scientist at the University of Washington’s Laboratory of Applied Physics, Kristin Laidre, said the icebergs and glaciers that polar bears in Greenland used to survive were no longer present in parts of the Arctic. This has the potential to make polar bears even more genetically isolated in the world.
Polar bears have the ability to fast or not eat for long periods of time, but they must at least eat after 100-180 days to survive. Female polar bears in Southeast Greenland tend to be thinner than other polar bear subpopulations.
“They are difficult to reproduce. They reproduce more slowly, and are smaller in size. However, what is important is that they survive,” said Beth Shapiro, an evolutionary molecular biologist at the University of California. EarthFriday (17/6).
Greenland continues to experience global warming, accompanied by changes and melting of glaciers and glacial habitats. This polar bear is at risk of extinction. Another threat is the arrival of immigrant bears, which could be the next problem for Greenland’s genetically smaller polar bear population.
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