| Impact ID | 4802 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Dikerogammarus villosus has displaced an additional Dikerogammarus invader (D. haemobaphes) in portions of the Danube and Rhine rivers |
| Reference | 37125 |
| Cost | |
| Location | Danube and Rhine rivers |