| Impact ID | 9726 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Didymosphenia geminata dominates stream surfaces by covering up to 100% of substrate with thicknesses of greater than 20cm, greatly altering physical and biological conditions. |
| Reference | 30501 |
| Great Lakes Region | No |
| Cost | |
| Location | |
