| Impact ID | 7849 |
| Impact Type | Habitat Alteration |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | In the western U.S., emergent monocultures of Butomus umbellatus have colonized and reduced areas of open water. Although scientific study is limited, these invasions have reportedly reduced water flow in canals and modified the physical structure of previously unvegetated localities. |
| Reference | 25143 |
| Cost | |
| Location | |