| Impact ID | 5449 |
| Impact Type | Predation/Herbivory |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Modest to dramatic declines in phytoplankton or seston have been seen in heavily infested habitats - quoting (Cohen et al. 1984, Lauritsen 1986, Leff et al. 1990, Phelps 1994) |
| Reference | 13063 |
| Cost | |
| Location | North America |