Sentences with phrase «salmon runs declined»
As a result, seabirds starved and salmon runs declined.
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West coast salmon runs have been in decline for decades, stemming largely from the damming of rivers and the pollution throughout the fish's extensive range from freshwater mountain streams to deep offshore ocean currents.
Four years after the Exxon Valdez ran aground in Prince William Sound, Alaska, herring stocks collapsed and a marked decline was seen in salmon populations.
# 3: Lower Snake River (WA, OR, ID) Threat: Four dams Four dams on the lower Snake River have caused dramatic declines in the Snake River basin's once magnificent salmon runs and have stymied efforts to restore these fish.