| Impact ID | 4577 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Bythotrephes are suspected to contribute to the decrease in alewife Daphnia hyalina populations during the summer months in Lago Maggiore. |
| Reference | 33103 |
| Great Lakes Region | Yes |
| Cost | |
| Location | Lago Maggiore |
