The Impact of Climate Change on Polar Bears

Polar bears, the largest bear species, are adapted to life in the Arctic, spending most of their time on pack ice hunting seals. They are strong swimmers but face challenges due to climate change, which is reducing their hunting season and causing population declines. The World Conservation Union lists them as vulnerable. In Hudson Bay, ice melts earlier, reducing bear numbers by 20% in 30 years. In Alaska, ice retreat has led to drowning incidents. The US Geological Survey predicts a two-thirds population decline by mid-century due to continued sea ice loss.

What is a unique adaptation of polar bears that helps them survive in the Arctic?

• Climbing trees

• Camouflage in forests

• Ability to hibernate

• Thick fur for warmth

Why is early spring a crucial feeding time for polar bears?

• Seals are more abundant

• Ice is completely melted

• Bears are in hibernation

• Bears migrate to warmer areas

What happens to polar bears during the summer months when the ice melts?

• They migrate south

• They fast or eat less frequently

• They hunt more seals

• They hibernate

What has been observed at the southern extremity of the polar bear's range in Hudson Bay?

• Increase in bear population

• Earlier melting of pack ice

• Longer hunting seasons

• Bears gaining more weight

What is the predicted impact of continued sea ice decline on polar bear populations by mid-century?

• Population will increase slightly

• Population will decrease by two-thirds

• Population will remain stable

• Population will double