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Wolves that nearly died out helping an island ecosystem

Wolves that nearly died out from inbreeding recover in remote US island

Wolves that nearly died out from inbreeding recovered, now helping a remote island s ecosystem

Gray wolves are thriving at Isle Royale National Park five years after authorities began a last-ditch attempt to prevent the species from dying out on the Lake Superior island chain, scientists said Wednesday. Overpopulation of the lumbering mammals were causing their own starvation as they outstripped available balsam fir trees — their primary food during long, snowbound winters, Michigan Technological University biologists said. The trends appear to justify federal officials' 2018 decision to airlift mainland wolves to Isle Royale, the researchers said, arguing that the predators' return is helping rebalance an ecosystem knocked off-kilter as their number dropped to just two.

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