| Impact ID | 4890 |
| Impact Type | Harvest |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Didymosphenia geminata is thought to be the reason for the decline of adult Salmo trutta (brown trout) in a river in South Dakota |
| Reference | 37330 |
| Great Lakes Region | No |
| Cost | |
| Location | Rapid Creek, South Dakota |
