First Statewide Native Mussel Survey In 40 Years Reveals Mixed Trends

First Statewide Native Mussel Survey In 40 Years Reveals Mixed Trends Species once commercially important now recognized for ecosystem importance The first statewide survey for native mussels in 40 years in Wisconsin shows these water-cleaning clams are facing mixed fortunes. Mussel populations and diversity were highest in the St. Croix River, with 24 different species found at one