From the same article.
Salmon of all species very rapidly moved into habitats they havent been able to get to for 100 years, says Ian Miller, Coastal Hazards Specialist with Washington Sea Grant. That was happening effectively in the same season as the blockages were removed in most cases.

Lots of good information and qualifiers about these being early results. Points out how the return of salmon strengthens the entire habitat and increases biodiversity. You know, stupid treehugger nonsense.

How eager they are to be slaves - Tiberius Caesar

Coulda tripped out easy, but I've changed my ways - Donovan