| Impact ID | 2900 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Moderate levels of 100-200 zebra mussels attached on a native unionid mussel can be catastrophic to the native mussel population overall. |
| Reference | 20771 |
| Great Lakes Region | Yes |
| Cost | |
| Location | |
