| Impact ID | 9141 |
| Impact Type | Predation/Herbivory |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | The introduction of zander (Sander lucioperca) to a Danish lake in the early 1900s led to a permanent reduction in cyprinid densities. |
| Reference | 31221 |
| Cost | |
| Location | |