Climate change has become an increasingly serious topic in recent years. The long-standing climate change has had a huge impact on the earth’s poles. To make matters worse, climate change may cause almost all polar bears to disappear by 2100, according to a new article published in the journal Nature Climate Change. The team is known to have created this “survival schedule” for polar bears by continuing to observe the decline in Arctic sea ice and its impact on the hunting habits of polar bears.
Infographic (from Wikipedia / USGS)
Polar bears are known to spend most of their time on Arctic sea ice, but the collapse in Arctic sea ice cover has posed a serious threat to their livelihoods.
Polar bears must rely on large chunks of sea ice to hunt seals to maintain the high-fat diet they need to survive. But as their habitat shrinks, they are facing an increasingly serious survival struggle.
Assuming climate change continues at the current rate, few polar bears will survive by the end of the century. But even now, the World Wildlife Fund has listed polar bears as vulnerable species.
In the new study, published in the journal Nature Climate Change, scientists at the University of Toronto have painted a rather shocking picture of the relationship between the decline in sea ice cover and the survival of polar bears.
The study first simulated how long polar bears can survive without feeding their cubs after the sea ice disappears. Combined with climate models predicting a reduction in sea ice, to determine how long the fasting season is for different polar bear populations.
“We first assumed that polar bears had stored a certain amount of energy in their bodies before each fasting, so that they could survive physically for a number of days without food,” said study-making P?ter Moln?r.
The team then used a model to predict how sea ice loss would affect the survival and reproduction of about 80 percent of polar bear populations.
While there is not enough data to study the survival and reproduction risks of the remaining 20 percent of polar bears living in certain inter-island channels, the researchers hope they follow a similar pattern.
The results show that if climate change continues, by 2100 almost all polar bear populations will face an existential crisis caused by reduced sea ice, with only a small number of populations living in the Arctic Highlands being spared.
The challenge, Moln?r points out, is that Arctic sea ice will continue to disappear as the world continues to warm. This means that polar bears everywhere will face longer foodless survival, which in turn affects the long-term survival and reproductive viability of healthy populations.