Dam good research on invasive beavers in Patagonia

For three years, Duke student Alejandro Pietrek has bravely grappled with some unusual marauders of the forests and steppes of Patagonia: invasive beavers. A biology graduate student, Pietrek recently presented his dissertation on the "Demography of invasive beavers in the heterogeneous landscapes of Patagonia." Pietrek has studied over two dozen colonies of beavers in order to answer three questions:

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