| Impact ID | 7085 |
| Impact Type | Recreation |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Hygrophila polysperma is capable of occupying the whole water column; this reportedly interferes with navigation and can inhibit recreational use for swimming and boating. |
| Reference | 31293 |
| Great Lakes Region | No |
| Cost | |
| Location | |
