| Impact ID | 7843 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Butomus umbellatus forms dense stands in southern Lake Champlain, where it appears to displace native species. |
| Reference | 18753 |
| Great Lakes Region | Yes |
| Cost | |
| Location | Lake Champlain, New York, USA |
