| Impact ID | 2695 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | The density of native mussels was significantly lower in 1992 than in 1986. The number of sites where native mussels were not found increased from 4 to 15. |
| Reference | 9095 |
| Cost | |
| Location | Lake St. Clair |