| Impact ID | 7892 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Carex acutiformis was discovered dominating a 6-acre open marsh area in the Stony Swamp Conservation Area near Ottawa, ON, where it co-existed with native trees but had displaced nearly all other native plants in both open water and some relatively dry areas. |
| Reference | 25183 |
| Cost | |
| Location | Ottawa, Ontario |