| Impact ID | 2663 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Phytoplankton decline was observed in a river, and potentially in other European and North American rivers, is not only due to Corbicula clams, but to a synergistic effect of two Dreissena species present in the river throughout the year. |
| Reference | 33134 |
| Great Lakes Region | No |
| Cost | |
| Location | |
