| Impact ID | 4031 |
| Impact Type | Navigation |
| Study Type | Anecdotal |
| Study Location | Field |
| Impact Description | In its introduced range, starry stonewort (Nitellopsis obtusa) grows in dense mats and negatively impacts recreation by hindering fishing and swimming and by clogging boat motors. |
| Reference | 28231 |
| Great Lakes Region | Yes |
| Cost | |
| Location | New York, USA |
