. Habitat characteristics of the Silver Lake Mule Deer Range. Botany Oregon Lake County Ecology; Mule deer Oregon. Pinus ponderosa I Artemisia tridentata I Bromus carinatus Ecosystem Physical Description Site. — This ecosystem occupies several thousand acres at elevations be- tween 6,000 and 7,200 feet with a slight westerly aspect. This is an area where the runoff from heavy snowpacks appears to produce numerous in- termittent drainageways or seasonal streambeds. Vegetation. — Pinus ponderosa dominates the overstory and is mixed with very small numbers of Pinus contorta and Abies concolor. Tr
. Habitat characteristics of the Silver Lake Mule Deer Range. Botany Oregon Lake County Ecology; Mule deer Oregon. Pinus ponderosa I Artemisia tridentata I Bromus carinatus Ecosystem Physical Description Site. — This ecosystem occupies several thousand acres at elevations be- tween 6,000 and 7,200 feet with a slight westerly aspect. This is an area where the runoff from heavy snowpacks appears to produce numerous in- termittent drainageways or seasonal streambeds. Vegetation. — Pinus ponderosa dominates the overstory and is mixed with very small numbers of Pinus contorta and Abies concolor. Tree re- production, although sparse, includes all three species with P. ponderosa outnumbering the others tenfold. The shrub layer is characterized by a dominant stand of Artemisia tridentata with Symphoricarpos albus and Eriogonum microthecum commonly distributed throughout. Bromus carinatus and Poa nervosa are about equally abundant and to- gether account for about 31 percent of the total composition. Lesser amounts of Sitanion hystrix, Stipa occidentalism and Carex rossii complete the grass and sedge component of this ecosystem. Forbs are less prominent than grasses. About 15 species combine to make 10 percent or less of the vegetal composition. Collinsia parviflora, an annual, makes up nearly half of the forb component, and the other half is composed primarily of Achillea millefolium, Lathyrus sp., and Fragaria virginiana. Soil. — The soil is a moderately deep, well-drained loam with gravels common throughout the solum. Depth averages 24 inches and roots are concentrated in the upper 8 inches but common to 20 inches. Stones ac- count for 1 percent of the soil surface and vary from less than 5 percent to 60 percent of the solum volume. The A horizon has a loam texture, a pH of , and averages 12 inches in depth. The B horizon is a clay loam, 12 inches deep, and the pH is to The typical profile description is as follows: All 0-3 inches. Dark brown ( YR 3/2)
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