Polar Bears in Alaska: Survival, Decline, and the Ice They Depend On

Polar bears are found in Alaska in two primary subpopulations: the Southern Beaufort Sea bears and the Chukchi Sea / Alaska-Chukotka bears.

Population Trends: Mixed, But Concerning

• The Southern Beaufort Sea population is in decline. Alaska Department of Fish and Game+2Defenders of Wildlife

• The Chukchi Sea group is less well understood: status is considered “unknown” due to limited data. Alaska Department of Fish and Game

• Estimates suggest about 900 bears in the Southern Beaufort region and around 3,000 in the Chukchi Sea region. National Park Service

• Globally, the U.S. Fish and Wildlife Service reports a polar bear estimate of roughly 26,000 individuals across all Arctic subpopulations, though many are poorly quantified.

Why Populations Are Struggling

The primary threat facing polar bears in Alaska is loss of sea ice due to climate warming. Polar bears rely on sea ice as a platform to hunt their main prey, seals.

As ice retreats earlier in the spring and forms later in the fall, bears are forced to spend more time on land, where food options are limited. Attempts to eat terrestrial foods—like birds, eggs, or berries—are largely insufficient to sustain them.

Additionally:

• Habitat fragmentation and thinner, less stable ice make hunting and migration more dangerous.

• Increased human activity—oil exploration, shipping, and Arctic infrastructure—adds stress, increases pollution risk, and raises chances for human-wildlife conflict.

• Climate change may also expose polar bears to new diseases or weakened immune systems as they venture into unfamiliar areas.

Conservation & Protections

Polar bears in the U.S. are protected under the Marine Mammal Protection Act and listed as “threatened” under the Endangered Species Act.

Efforts include:

• Monitoring via tagging, aerial surveys, genetic studies, and collaborations with Alaska Native communities

• The 1973 Agreement on the Conservation of Polar Bears, which commits Arctic nations to regulate hunting and protect essential habitat.

Outlook & Uncertainty

While some regional populations may temporarily stabilize in parts of the High Arctic where ice persists longer, many scientists warn of local extinctions if warming trends continue.

Given the complexity of Arctic ecosystems, data gaps, and accelerating climate change, the future of polar bears in Alaska is uncertain. Their fate now hinges heavily on how rapidly global ice loss is mitigated—and how effectively human impacts are managed in the fragile Arctic frontier.