| Impact ID | 8231 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Spring phytoplankton biomass and primary production in Lake Michigan decreased 87% and 70%, respectively, from 1995-98 to 2007-08, after Dreissena bugensis entered Lake Michigan. This could result in increased competition among planktivorous species. |
| Reference | 24624 |
| Cost | |
| Location | Lake Michigan, USA |