Ef­fect on species

Down to Earth - - SCIENCE -

TWO STUD­IES pro­vide ev­i­dence on how dams im­pose stress on a species' sur­vival. Re­searchers stud­ied Wash­ing­ton's Olympic Na­tional Park and the sur­round­ing ar­eas. The El­wha River winds through the park and is the site of the largest dam re­moval in his­tory—El­wha and Glines Canyon dams were dis­man­tled in 2011 and 2014. Th­ese ar­eas, pre­vi­ously de­pleted of salmon, are fast re­cov­er­ing. A song­bird species that flour­ishes on the salmon is back in the ecosys­tem. Bi­o­log­i­cal Con­ser­va­tion, De­cem­ber 2015

LINDA LEE / UNIVER­SIT Y OF GE­OR­GIA

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