| Impact ID | 8431 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Heteropsyllus nr. nunni has dominated the harpacticoid community in shallow sites (up to 9 m) in Lake Michigan. This may either be due to successful competition with native species for similar resources or the ability to exploit unused resources. |
| Reference | 16245 |
| Cost | |
| Location | Lake Michigan, Michigan City, Indiana, USA |