| Impact ID | 4003 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | When starry stonewort (Nitellopsis obtusa) is abundant, it appears to extirpate all other submerged aquatic vegetation by outcompeting them for light and other resources. |
| Reference | 19736 |
| Cost | |
| Location | Michigan, USA |