GAP Analysis Predicted Distribution Map

Olympic Torrent Salamander (Rhyacotriton olympicus)

Species Code: RHOL

Legend: = Core Habitat = Marginal Habitat Metadata (Data about data or how the map was made) Predicted Distribution Amphibians do not migrate as some birds and mammals, so the colored areas depict the predicted range for the Olympic Torrent Salamander year-round. The habitats were identified using 1991 satellite imagery, other datasets and experts throughout the state, as part of the Washington Gap Analysis Project. Click to enlarge distribution map Other maps & Information: NatureMapping observations throughout the year

Distribution and Habitat Requirements
Torrent salamanders are specialized to a life in cold water splash zones in streams, seepages or waterfalls. The Olympic Torrent Salamander is found on the Olympic Peninsula. This species is associated with small streams. Hardwood stands along rivers and streams big enough to show up on the GAP vegetation maps, were not considered suitable habitat.

Models
The Inner and Outer Olympic Peninsula ecoregions and Olympic margins of the Puget Trough were selected. The Western Hemlock and Silver Fir zones were core areas of habitat. The Sitka Sprucde, Puget Sound Douglas-fir and Olympic Douglas-fir zones were marginal. Conifer tree-lined river and stream bank areas were good habitats. Mid-and late stage closed-canopy hardwood/conifer and conifer forests were considered suitable if appropriate microhabitats existed. Virtually all recent records occurred in mid-to late-stage forest, but since very little data were collected from private lands, it may be possible that this species could occur in younger forests. Coastal areas with low relief along the coast, were eliminated since this salamander is generally found in areas with sharply cut valleys where cold, clear water percolates through soil and gravel.

Translated from the Washington Gap Analysis Amphibians and Reptiles Volume by Karen Dvornich
Webpage designed by Dave Lester