Scientist Bruce Wright has been studying the Alaska ecosystem for most of his adult life. He has worked for everyone from the Alaska Department of Fish and Game and National Oceanographic and Atmospheric Administration to the Aleutian Pribilof Islands Association and his current gig as senior scientist for the Knik Tribe.

He has studied the effects of nuclear testing and the Exxon Valdez oil spill on Alaska’s ecosystem. He is among Alaska’s top authorities on its apex predators, like eagles, killer whales and great white sharks. But in his current work with the Knik Tribe, Mr. Wright has been calling attention to an even deadlier threat. One that has been carried by the tides and currents to the farthest reaches of Alaskan waters, and that is just waiting to be triggered by the inevitably warming waters of the North Pacific.

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