Non-native fish and bullfrogs (Lithobates catesbeianus) are frequently cited as contributing to the decline of ranid frogs in the western United States, so we hypothesized that non-native species, habitat, or a combination of these relate to the probability of local extinction for northern red-legged frogs (Rana aurora) in Oregon, USA. We also hypothesized that the probability of colonization relates to land use, wetland size, or riparian forest. In a 5-yr study, we found no support for an effect of non-native species on northern red-legged frogs. Instead, probability of local extinction decreased with the extent of emergent vegetation and riparian forest. This finding suggests that managers consider the role of habitat when confronting non-native species problems.
|Title||Non-native species impacts on pond occupancy by an anuran|
|Authors||Michael Adams, Christopher Pearl, Stephanie Galvan, Brome McCreary|
|Publication Subtype||Journal Article|
|Series Title||Journal of Wildlife Management|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Forest and Rangeland Ecosys Science Center|