Why Polar Bears Can't Live in Alberta: Missing Sea Ice & Seals

Polar bears (Ursus maritimus) are marine mammals evolutionarily bound to Arctic sea ice. Alberta, a landlocked prairie/mountain province ~1,500 km from the Arctic Ocean, cannot meet two non-negotiable biological needs:

1. Sea Ice: The Essential Platform

• Hunting: Bears wait at seal breathing holes, stalk on ice, breach birth lairs. No ice = no access to primary prey.
• Movement: Ice is their highway—seasonal migrations 1,000s of km. Land travel is energetically costly, slow, dangerous.
• Reproduction: Maternal dens often on landfast ice or coastal drifts; cubs emerge onto ice to hunt.
• Resting/thermoregulation: Ice provides cool substrate; land overheats them in summer.

Alberta has zero sea ice. Its lakes freeze, but lack seals, are too small, and melt completely in summer.

2. Seal Abundance: The Caloric Foundation

• Primary prey: Ringed seal (Pusa hispida), Bearded seal (Erignathus barbatus).
• Energy density: Seal blubber = 9 kcal/g; polar bear needs ~12,000 kcal/day (active) — ~1.5 kg blubber = 1 ringed seal/week.
• Ecological link: Ringed seals *require* sea ice for pupping, molting, resting. No ice → no seals.
• Alberta seals? None. Freshwater seals exist only in Lake Baikal, Ladoga, Saimaa — not North America.

Occasional Vagrants ≠ Viable Population

Rare long-distance dispersers (subadult males) have reached northern Alberta (e.g., Fort Chipewyan, 2019). They starve or return north. No breeding, no residency.

Climate Change Context

As Arctic ice retreats, polar bears spend more time on land—fasting longer, losing condition, reproducing less. Alberta's future climate (warmer, ice-free) will be *less* suitable, not more.

Alberta has grizzlies, black bears, cougars—but no niche for the ice bear.