Books et al.Ecology

Nature's riverkeepers

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Science  27 Jul 2018:
Vol. 361, Issue 6400, pp. 338
DOI: 10.1126/science.aat7938

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Researchers have calculated that between 15 million and 250 million beaver ponds once covered North America. A booming 19th-century trade in beaver pelts, along with a loss of habitat due to settlement, almost wiped them out. Beaver populations recovered through the 1920s and 1930s, but never to their original numbers. Eager, by Ben Goldfarb, examines how they're getting along today.