| Impact ID | 7544 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Nitellopsis obtusa was recorded at a peak biomass of 259 g m-2 in September, when many other macrophytes were declining, giving it a competitive advantage. |
| Reference | 17617 |
| Great Lakes Region | Yes |
| Cost | |
| Location | Detroit River, USA |
