Quantifying the Impacts of a Novel Predator: The Distinctive Case of the Oregon Spotted Frog (<i>Rana pretiosa</i>) and the Invasive American Bullfrog (<i>Rana (Aquarana) catesbeiana</i>)
Abstract:The decline of the Oregon Spotted Frog (Rana pretiosa), a Pacific Northwest endemic now federally listed as threatened, has been attributed to several aspects of ecosystem alteration, primarily habitat degradation and loss. The introduced American Bullfrog (Rana (Aquarana) catesbeiana) has been widely implicated in those declines, but the basis of that contention has been difficult to characterize. The bullfrog occurring at every site of recent Oregon Spotted Frog extirpation has focused concern about its impa… Show more
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