| Impact ID | 7179 |
| Impact Type | Commerce |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In 2003, mats of Ulva flexuosa washed up on the shores of Muskegon Lake during the bloom. In addition to the cost to boat users, these blooms also decreased the value of lakeshore property and discouraged tourism. |
| Reference | 17219 |
| Cost | |
| Location | Muskegon Lake, Michigan, USA |