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Ecological Framework of Canada
Ecoregions of Canada


This ecoregion in southeastern Yukon spans the boundary with British Columbia north of the Liard River. The mean annual temperature for the area is approximately -2°C with a summer mean of 10°C and a winter mean of -18°C. Precipitation varies 500-600 mm being greatest at higher elevations in the northern portion of the ecoregion. Open stands of black and white spruce with an understory of dwarf birch, Labrador tea, lichen, and moss predominate the boreal forest. Drier and warmer sites tend to have more white spruce with lodgepole pine, paper birch, and some aspen. The ecoregion supports forests with considerable productivity. Wet sites are usually covered with bog or fen vegetation such as dwarf black spruce, larch, Labrador tea, ericaceous shrubs, sedges and mosses. The ecoregion takes in parts of the Liard Plateau physiographic unit that is underlain mainly by Cretaceous shale. Many summits and hills are flat, but extensive remnants of former erosion surfaces are evident. Elevations are usually less than 1400 m asl, but some local ranges contain summits over 1800 m asl. The valleys are wide. Permafrost is sporadic, being confined to lower, north-facing slopes and some organic deposits primarily in the northwestern part  of the ecoregion. Brunisolic Gray Luvisols are common on medium-textured deposits. Eutric Brunisols are common on coarse materials. Dystric Brunisols occur in alpine and subalpine areas. This ecoregion provides habitat for a wide range of wildlife species, including moose, red fox, beaver, snowshoe hare, arctic ground squirrel, wolf, lynx, weasel, snowy owl, and various raptors. Land uses include some forest harvesting, mineral exploration, big game hunting and guiding, subsistence hunting and trapping, and minor amounts of recreation and tourism. There are no major settlements in the ecoregion. The population of the ecoregion is approximately 100.

This ecoregion is part of the Boreal Cordillera ecozone.