| Impact ID | 8102 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Once established, black-grass rush (Juncus gerardii) can dominate terrestrial borders of high marshes and displace native species, such as Spartina patens. |
| Reference | 25683 |
| Cost | |
| Location | Rumstick Cove salt marsh, Barrington, Rhode Island, USA |