| Impact ID | 6322 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | The initial replacement of Gammarus fasciatus by Echinogammarus ischnus occurred in primarily rocky and dreissenid-covered habitats, while G. fasciatus populations continued to persist on algal and macrophyte covered substrates |
| Reference | 24588 |
| Cost | |
| Location | Lake Erie, Michigan, USA |