|Scientific Name:||Rhyacotriton cascadae Good & Wake, 1992|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Reviewer(s):||Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)|
Listed as Near Threatened because its Extent of Occurrence is probably not much greater than 20,000 km2, and its habitat is in decline, thus making the species close to qualifying for Vulnerable.
|Range Description:||This species can be found on the west slope of the Cascade Mountains from just north of Mount Saint Helens, Skamania County, Washington, south to north-eastern Lane County, Oregon, USA (Good and Wake 1992).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||McAllister (1995) mapped approximately 53 collections or verified sighting locations in Washington. It is fairly common in appropriate habitat (Leonard et al. 1993), and its population is stable in Oregon (E. Gaines pers. comm.).|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||It can be found in coniferous forests in small, cold mountain streams and spring seepages. Larvae often occur under stones in shaded streams. Adults also inhabit these streams or the streamsides in saturated moss-covered talus, or under rocks in the splash zone. This species is found primarily in older forest sites since the required microclimatic and microhabitat conditions generally exist only in older forests (Welsh 1990). Two Rhyacotriton nests were found in deep, narrow rock crevices, and the eggs were lying in cold, slow-moving water (Nussbaum et al. 1983).|
|Major Threat(s):||This species is sensitive to increased temperature and sedimentation, such as may result from logging or road construction for logging access. Timber harvesting negatively affects Rhyacotriton salamanders more than it does other amphibians in the same area (Bury and Corn 1988b; Corn and Bury 1989). Some populations are isolated by intervening areas of unsuitable habitat, and these are then vulnerable to extirpation through natural processes exacerbated by timber harvest (especially of old growth stands on north-facing slopes). This species is moderately threatened in Oregon (E. Gaines pers. comm.).|
|Conservation Actions:||It occurs in some protected areas. Its conservation needs include retention of old-growth forest buffers around headwater streams (Petranka 1998).|
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Good, D.A., Wurst, G.Z. and Wake, D.B. 1987. Patterns of geographic variation in allozymes of the Olympic salamander, Rhyacotriton olympicus (Caudata: Dicamptodontidae). Fieldiana Zoology: 15 pp.
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McAllister, K.R. 1995. Distribution of amphibians and reptiles in Washington State. Northwest Fauna: 81-112.
Nijhuis, M.J. and Kaplan, R.H. 1998. Movement patterns and life history characteristics in a population of the cascade torrent salamander (Rhyacotriton cascadae) in the Columbia River gorge, Oregon. Journal of Herpetology: 301-304.
Nussbaum, R.A. and Tait, C.K. 1977. Aspects of the life history and ecology of the Olympic salamander, Rhyacoitriton olympicus (Gaige). American Midland Naturalist: 176-199.
Nussbaum, R.A., Brodie, Jr., E.D. and Storm, R.M. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho, Moscow, ID, USA.
Petranka, J.W. 1998. Salamanders of the United States and Canada. Smithsonian Institution Press, Washington, D.C.
Stebbins, R.C. 1985. A Field Guide to Western Reptiles and Amphibians. Second Edition. Houghton Mifflin Company, Boston, Massachusetts.
Thomas, J.W., Ward, J., Raphael, M.G., Anthony, R.G., Forsman, E.D., Gunderson, A.G., Holthausen, R.S., Marcot, B.G., Reeves, G.H., Sedell, J.R. and Solis, D.M. 1993. Viability assessments and management considerations for species associated with late-successional and old-growth forests of the Pacific Northwest. The report of the Scientific Analysis Team. USDA Forest Service, Spotted Owl EIS Team, pp. 530 pp. Portland, Oregon.
Welsh, H.H., Jr. 1990. Relictual amphibians and old-growth forests. Conservation Biology: 309-319.
Welsh, H.H., Jr. and Lind, A.J. 1992. Population ecology of two relictual salamanders from the Klamath Mountains of Northwestern California. In: McCullough D.R. and Barrett, R.H. (eds), Wildlife 2001: Populations, pp. 419-437. Elsevier Applied Science, London.
Welsh, H.H., Jr. and Lind, A.J. 1996. Habitat correlates of the southern torrent salamander, Rhyacotriton variegatus (Caudata: Rhyacotritonidae), in northwestern California. Journal of Herpetology: 385-398.
|Citation:||Geoffrey Hammerson. 2004. Rhyacotriton cascadae. The IUCN Red List of Threatened Species 2004: e.T59435A11941314.Downloaded on 18 November 2017.|
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