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Effects of Cattle Grazing and Related Habitat Alteration on Columbia Spotted Frog Population in Oregon: Post-treatment Funding
Completed
Columbia spotted frogs breed in ponds in the northwestern U.S. and are thought to be declining in parts of their southern range. Columbia spotted frogs generally deposit egg masses in northeastern portions of ponds in shallowly sloped, vegetated areas close to shore. This species of frog reuses breeding sites between years, so conservation of quality breeding habitat has the potential to benefit local populations. The objective of the study is to see if full and partial livestock grazing exclosures provide protection for Columbia spotted frog populations in the Wallowa Mountains of northeastern Oregon. USGS scientists compare breeding habitat, egg mass survival, water quality, potential pathogens, and hormonally active agents among fully grazed, fully exclosed, and partially exclosed ponds. This information is useful for land managers considering habitat construction or restoration.
Adams, M.J., Pearl, C.A., McCreary, B., Galvan, S.K., Wessell, S., Wente, W.H., Anderson, C.W., Kuehl, A.B., 2009, Short-term effect of cattle exclosures on Columbia spotted frog (Rana luteiventris) populations and habitat in northeastern Oregon: Journal of Herpetology, v. 43, no. 1, p. 132-138. [Highlight] [FullText] Catalog No: 1948 Pearl, C.A., Adams, M.J., Wente, W.H., 2007, Characteristics of Columbia spotted frog (Rana luteiventris) oviposition sites in northeastern Oregon, USA: Western North American Naturalist, v. 67, no. 1, p. 86-91. [Highlight] [FullText] Catalog No: 1739
Adams, Michael J. - Supervisory Research Ecologist
Phone: 541-758-8857
Email: mjadams@usgs.gov
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