| Impact ID | 4626 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Trapa natans forms dense mats in the Hudson River that support a more diverse and dense macroinvertebrate population and fish assemblage than the native plant Vallisneria americana. |
| Reference | 17104 |
| Cost | |
| Location | Hudson River, New York, USA |