Aquatic Invasive Species

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By Forest and Rangeland Ecosystem Science Center November 6, 2017

Aquatic invasive species, like bullfrogs, stocked fish, crayfish, and reed canarygrass can affect aquatic systems in a variety of ways and have been linked to declines in some amphibians.

A researchers holds a ringed crayfish — The ringed crayfish (Orconectes neglectus) is an invasive species of concern threatening native crayfish in Oregon waterways.

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January 1, 2000

Pond permanence and the effects of exotic vertebrates on anurans Pond permanence and the effects of exotic vertebrates on anurans

In many permanent ponds throughout western North America, the introduction of a variety of exotic fish and bullfrogs (Rana catesbeiana) correlates with declines in native amphibians. Direct effects of exotics are suspected to be responsible for the rarity of some native amphibians and are one hypothesis to explain the prevalence of amphibian declines in western North America. However...

Authors

M. J. Adams

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

January 1, 1999

Correlated factors in amphibian decline: Exotic species and habitat change in western Washington Correlated factors in amphibian decline: Exotic species and habitat change in western Washington

Amphibian declines may frequently be associated with multiple, correlated factors. In western North America, exotic species and hydrological changes are often correlated and are considered 2 of the greatest threats to freshwater systems. Bullfrog (Rana catesbeiana) introductions are frequently cited as a threat to lentic-breeding anurans native to western North America and are a...

Authors

M. J. Adams

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center