Global warming is causing unexpected changes in nature. One of them is the spread of the hybrid bear between polar and Grizzly (Grizzly). They are also known as grant recipients. Before that, it was very rare to see them. But now they are much more common. The cause is the increasing contact between the two species of bears. Global warming favors this.
Change living spaces
The world is warming up and the arctic ice is shrinking. And polar bears keep looking for food further south. There they meet brown bears, the distribution areas of which in turn extend to the north.
Hybrid animals are usually not better adapted to their environment. Scholars seem to be an exception. In fact, it has some properties that could give you benefits. Especially in the warming of the northern habitats.
Hybrids are generally no better adapted to their environment than their parents. But they can look for a wider variety of food sources. ‘It He said Larisa DeSantis, paleontologist at Vanderbilt University (USA).
Polar bears have longer skulls. This makes it easier for them to catch seals from the sea. However, his molars are small for the size of his body. It’s because they eat soft foods. Brown bears now have larger teeth and can eat a variety of foods.
We do not know yet. But perhaps the intermediate skull of the grolar or pizzly would have a biomechanical advantage. ‘This is the hypothesis that DeSantis posits.
Brown bears and polar bears diverged relatively recently. It was about 500,000 to 600,000 years ago. Therefore, by mating, the two species can produce viable offspring. Observations in captivity and in the wild also suggest that fellows are fertile. The hybrid bear between polar and grissly it can also have offspring.
They have been seen in the wild since 2006. But they have become more and more common. In 2017, for example, a single white female bear gave birth to eight large babies.
“We have massive effects on climate change. It currently affects many species, ”said DeSantis. The endangered polar bears are a sign of how bad things are.