The Wolves and Moose of Isle Royale

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"On Isle Royale, a remote island natioanl park surrounded by frigid Lake Superior, a thrilling drama is unfolding between wolves and moose, the island's ultimate predator and prey. For over sixty years, in what has been known as the longest study of a predator-prey relationship in the world, scientists have observed the importance of wolves to Isle Royale's unique ecology. But due to illness and underlying factors, the population of wolves on the island has dropped while the number of moose has increased, putting the Isle Royale ecosystem in jeopardy"--