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• <br />and litter and rock was 15.0 percent combined. Mean shrub cover was 42.9 <br />percent, more than half the total vegetation cover. Western snowberry was the <br />dominant species with 24.9 percent cover. Serviceberry and Gambel oakbrush <br />had 8.8 and 5.9 percent cover, respectively. Western snowberry had a <br />significant presence in the samples because cover samples were taken from <br />measurements made below a height of 4 feet. As such samples were more a <br />measurement of the understory of the type rather than the total canopy cover. <br />Many of the Serviceberry and oakbrush shrubs had heights exceeding 4 feet. <br />Perennial grasses had a cover of 18.3 percent. Nodding brome, slender <br />wheatgrass, and blue wiidrye were the dominant grasses. Perennial forbs had a <br />cover of 12.4 percent with silvery lupine the dominant forb. Other co- <br />dominant forbs included Western yarrow, nettleleaf horsemint, smooth fleabane <br />and aspen peavine. <br />Total vegetation cover within the mountain shrub reference area was <br />higher than that of study area samples at 88.7 percent (Table 3.5). Bare <br />ground was 2.9 percent and lower than study area samples. Litter and rock was <br />also lower than study area samples at 8.9 percent. Shrub cover within the <br />reference area was 36.8 percent. Western snowberry was the dominant shrub <br />with 24.8 percent mean cover. Serviceberry and Gambel oakbrush had 5.9 and <br />3.9 percent mean cover respectively. Perennial forbs had the second highest <br />cover as a group; 25.3 percent exceeding that of study area samples. Dominant <br />forbs included silvery lupine, nettleleaf horsemint, and American vetch. <br />Perennial grasses had a mean cover of 20.9 percent. Dominant grasses included <br />Kentucky bluegrass, nodding brome and blue wildrye. <br />Production - Fiean annual herbaceous production from study area samples <br />was 151.5 grams per square meter. Perennial grasses produced 80.1 grams per <br />square meter with Kentucky bluegrass producing 46.3 grams and nodding brome <br />15 <br />• <br />Exhibit 10, Item 5 Revision Date: 03/06/07 • <br />20 Revision No.: PR-02 <br />