| Impact ID | 7042 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Hydrilla verticillata infestations can cause a reduction or the extirpation of populations of native aquatic species. Hydrilla forms a dense mat of vegetation at the water surface and limits light penetration degrading or eliminating all layers below. |
| Reference | 42106 |
| Cost | |
| Location | |