| Impact ID | 3409 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | "The extremely dense submersed populations and large, thick surface mats produced by Rotala greatly reduce ecosystem quality because oxygen level and light penetration are hampered." |
| Reference | 33956 |
| Great Lakes Region | No |
| Cost | |
| Location | |
