| Impact ID | 3800 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | A mechanism for competitive exclusion of Gammarus fasciatus by Echinogammarus ischnus may be influenced by differences in the physical environment, such as dreissenid mussels, current velocity, and sediment size. |
| Reference | 16376 |
| Cost | |
| Location | St. Lawrence River, USA |