| Impact ID | 7453 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Native Canadian butterflies were known to be restricted to native Carex lacustris as a larval host plant, but its absence in the area, coupled with dominance of its close relative, Carex acutiformis, provides strong circumstantial evidence of the use of the latter as larval food by Broad-winged Skippers, Browns including the Eyed Brown, Dion Skippers and Mulberry Wings. Because the introduced Carex acutiformis has a broad distribution, these butterflies have been able to increase their distribution by switching to habitats dominated by this invasive species. |
| Reference | 42375 |
| Cost | |
| Location | Ottawa, Canada |