| Impact ID | 5998 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | The gravel snail (Lithoglyphus naticoides) can form dense mats with very high numbers of individuals per area that excludes competing mollusc species, such as D. polymorpha. |
| Reference | 34757 |
| Cost | |
| Location | Lake Lukomskoe, Belarus |