| Impact ID | 6128 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Invasive Echinogammarus ischnus is believed to have displaced native amphipod Gammarus fasciatus through competitive displacement. However, stable isotope analysis indicated these two species' diets do not overlap, suggesting a different mechanism of competition. |
| Reference | 16374 |
| Cost | |
| Location | Middle Sister Island, Lake Erie, USA |