| Impact ID | 8373 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Further study in Lake Ontario indicated that in the years following Cercopagis pengoi (fishhook flea) invasion, the density of small zooplankton began to drop in the late summer and fall seasons (when C. pengoi is most abundant). |
| Reference | 24549 |
| Cost | |
| Location | Lake Ontario, USA |