| Impact ID | 9310 |
| Impact Type | Commerce |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In the early 1900's, the Welland canal created a route for Petromyzon marinus to enter the upper Great Lakes because they were albe to bypass a natural barrier at Niagra Falls. After this invasion, the fisheries in the Great Lakes collapsed within a few decades of the Welland Canal construction. |
| Reference | 42812 |
| Cost | |
| Location | Upper Great Lakes, USA |