. Habitat characteristics of the Silver Lake Mule Deer Range. Botany Oregon Lake County Ecology; Mule deer Oregon. Populus tremuloides I Artemisia tridentata/ Bromus carinatus Ecosystem Physical Description Site. — This ecosystem occurs between 6,000- and 7,100-foot eleva- tion with level terrain or west-facing slopes of less than 5 percent in areas with numerous intermittent drainageways and heavy winter snow- packs. Topography is smooth to rolling, and the ground surface is moder- ately rough. Vegetation. — The overstory crown cover is unmistakably Populus tremuloides (24 percent) with an oc
. Habitat characteristics of the Silver Lake Mule Deer Range. Botany Oregon Lake County Ecology; Mule deer Oregon. Populus tremuloides I Artemisia tridentata/ Bromus carinatus Ecosystem Physical Description Site. — This ecosystem occurs between 6,000- and 7,100-foot eleva- tion with level terrain or west-facing slopes of less than 5 percent in areas with numerous intermittent drainageways and heavy winter snow- packs. Topography is smooth to rolling, and the ground surface is moder- ately rough. Vegetation. — The overstory crown cover is unmistakably Populus tremuloides (24 percent) with an occasional, scattered Pinus ponderosa. Artemisia tridentata is the most abundant species in the shrub stratum. Other shrubs with wide ecosystem distribution but much less prominence are Eriogonum microthecum and Symphoricarpos albus. Ribes cereum and Haplopappus bloomeri complete the shrub list. Grasses are dominated by Bromus carinatus (18-percent composition), followed by Sitanion hystrix and Poa nervosa. Perennial forbs occurring on all plots are Aster sp. and Lathyrus sp. Also common are Agoseris sp., Thalictrum sp., and Eriophyllum lanatum. The only annual which occurs with 100-percent frequency is Collinsia parviflora. As this community is heavily used by livestock during the summer, the understory appears ragged and trampled. Obviously, species composition represents something less than pristeen conditions. Soil. — This is a deep, well-drained, medium-textured soil developed in basalt residuum. The surface horizon (8-10 inches thick) ranges from brown to dark brown and from silt loam to loam. The solum is 28 inches plus with roots concentrated in the upper 10 inches but common throughout the profile. Permeability is estimated as moderately rapid and runoff as slow to medium. Erosion hazard is medi- um. The following soil profile description is representative of the soil under this vegetation community: Ol 1-0 inch. Populus tremuloides and Artemisia tridentata litter.
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