A songbird species that flourishes on the salmon-rich side of dams in the western United States struggles when it tries to nest on the side closed off from the fish and the nutrients they leave behind. But the songbird and the rest of the divided ecosystem rebounds, faster than some experts expected, when dams come down and rivers are allowed to resume their natural flow.
http://www.sciencedaily.com/releases/2015/12/151228124655.htm
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River ecosystems show 'incredible' initial recovery after dam removal
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