| Impact ID | 7894 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | In 1982, Carex acutiformis was observed forming a near monoculture around the entirety of St. Joseph Lake, South Bend, IN. |
| Reference | 703 |
| Cost | |
| Location | St. Joseph Lake, South Bend, Indiana, USA |