Episode Details

Deadly Algal Toxins Strike Pribilof Islands: A Growing Crisis in the Bering Sea

In a shocking turn of events, the Pribilof Islands in Alaskas eastern Bering Sea have been hit by deadly algal toxins for two consecutive summers. The first case involved ten northern fur seals found dead on St. Paul Island, surrounded by deceased fish and birds. Testing confirmed saxitoxin poisoning, a first in marine mammals. The following year, twenty-one more fur seals, two fin whales, a sea lion, and seabirds washed up on St. George Island.

These toxins originate from Alexandrium algae blooms, which thrive in warmer waters and are now spreading north due to climate change. Massive cyst seedbeds in the sediments, known as sleeping giants, are awakening and causing larger outbreaks before the die-offs.

Local residents and subsistence hunters are concerned about contaminated fish and squid in the food chain, as these islands host two-thirds of the worlds northern fur seals and support Alaskas massive fisheries. Scientists are monitoring blooms via ships and satellites, finding toxins even in Arctic bowhead whale feces and northern clams. Labs like the Sitka Tribes test shellfish quickly with a shellfish smoothie method.

As blooms continue to expand, monitoring programs and local labs offer hope for safer harvests and a clearer understanding of the impact on wildlife.

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