University of Vermont via EurekAlert:
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A study of marine mammals and other protected species finds that several once endangered species, including the iconic humpback whale, the northern elephant seal and green sea turtles, have recovered and are repopulating their former ranges.
The research, published in the June edition of Trends in Ecology and Evolution, suggests that some species, including humpback whales, have reached population levels that may warrant removal from endangered species lists.
But returning species, which defy global patterns of biodiversity loss, create an urgent new challenge for policymakers and communities, the study suggests.