Population fragmentation of spotted frogs in the Owyhee Mountains

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This report is based on a three-year study conducted from 1997-1999 on population fragmentation in the Great Basin population, Owyhee subpopulation, of Columbia spotted frogs. It includes a synopsis of the 1999 field data and looks at the three years collectively to reveal short-term trends and population demographics. During the short-term (1997-1999), the Owyhee subpopulation numbers steadily decreased. In some occurrences (Stoneman Creek, for example), numbers plummeted, while in others (Rock Creek), the decline was less dramatic, but steady. Climatic conditions combined with fragmentation and disturbance of suitable habitat patches and movement corridors by livestock were factors negatively influencing population numbers. Recommendations are listed for land use managers to help foster the persistence of the spotted frog over the long term.

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ELECTRONIC FILE - Zoology