| Impact ID | 6320 |
| Impact Type | Competition |
| Study Type | Experimental |
| Study Location | Field |
| Impact Description | On dreissenid mussel beds, Echinogammarus ischnus was numerically higher in certain years than Gammarus fasciatus. However, populations of both species fluctuated over time, suggesting other physical environmental factors beside substrate also mediated competition between these two species. This study suggests there is no difference between the two species in their vulnerability to predation on dreissenid-covered substrate, which contrasts with other studies. |
| Reference | 16377 |
| Cost | |
| Location | Lake Saint-Louis, Quebec, Canada |