| Impact ID | 9331 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | At 5 sites in Illinois, F. rusticus has increased over the last 25 years, while native crayfish species have declined, F. rusticus has also expanded its range over this period, with concomitant decreases in native crayfish at the additional sites likely |
| Reference | 42188 |
| Cost | |
| Location | Illinois |