| Impact ID | 4291 |
| Impact Type | Habitat Alteration |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In fields and marshes where Phragmites australis has replaced native vegetation stands, bird population abundance is lower and bird species compositions are altered. |
| Reference | 36123 |
| Cost | |
| Location | Long Point, Lake Erie, Ontario, Canada |