How 58 beavers revived a valley buried by Mount St. Helens eruption

More than 40 years after the Mount St. Helens eruption buried a Washington river valley under volcanic sediment, 58 relocated beavers have helped restore the damaged landscape. Their dams and wetlands brought back native plants, fish and wildlife. However, conservationists fear a planned government project to raise a sediment retention structure could undo years of natural restoration.

from Times of India https://timesofindia.indiatimes.com/world/us/in-1980-mount-st-helens-buried-a-river-valley-in-volcanic-sediment-then-58-beavers-helped-turn-the-wasteland-into-a-thriving-wetland/articleshow/132456524.cms