Study: Beavers Could Help Curb Soil Erosion, Clean Up Polluted Rivers
A new study, undertaken by a team of University of Exeter researchers using captive Eurasian beavers (Castor fiber), has demonstrated the significant impact the animals have had on reducing the flow of tons of soil and nutrients from nearby fields into a local river system.
http://www.sci-news.com/biology/beavers-curb-soil-erosion-polluted-rivers-05993.html