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- Total first-hit vegetation cover was 83.1 percent. Because of the extent of overlapping canopy <br />cover the total all-hit vegetation cover was 112.7 percent. Standing dead, litter, and bare soil <br />cover values were 1.7, 11.3, and 3.9 percent respectively. Species density averaged 30.9 <br />species per 100 sq. m. <br />Herbaceous Production (Table 5) <br />Total herbaceous production averaged 1237.8 pounds per acre. <br />Mountain Brush Extended Reference Area <br />(Photographs 9 through 12) <br />Cover (Table 6) <br />Native shrubs comprised 66.5 percent of total vegetation cover in this reference area. Gambel's <br />oak accounted for nearly half and mountain snowberry averaged almost one third of this total. <br />Together, Saskatoon serviceberry, chokecherry and big sagebrush accounted for the balance. <br />Native perennial cool season grasses averaged 25.5 percent of total vegetation cover. Agassiz <br />bluegrass (Poo agassizensis) contributed nearly one-half of this total. Elk sedge (Carex geyen) <br />and needle and thread (Hesperostipa comata) were also abundant species in this lifeform. Native <br />perennial forbs contributed 5.6 percent of total vegetation cover. Native annual and biennial (orbs <br />accounted for 0.4 percent of total vegetation cover. Introduced annual grasses, introduced <br />annual and biennial forbs, introduced perennial forbs and introduced perennial cool season <br />grasses each accounted for one percent or less of total vegetation cover. <br />Total vegetation cover was 64.8 percent. Standing dead, litter, bare soil, and rock averaged 2.4, <br />21.0, 11.2, and 0.6 percent respectively. Species density averaged 25.4 species per 100 sq. m. <br />Herbaceous Production (Table 7) <br />Total herbaceous production averaged 500.2 pounds per acre. <br />Sagebrush Extended Reference Area <br />(Photographs 13 through 16) <br />Cover (Table 8) <br />Native shrubs were dominant in this area and provided 44.0 percent of total vegetation cover. Big <br />sagebrush averaged more than one-half of this total. Mountain snowberry contributed two-fifths <br />of the total. Saskatoon serviceberry, Douglas rabbitbrush (Chrysothamnus viscidiFlorus) and <br />Gambel's oak accounted for the balance. Native perennial cool season grasses accounted for <br />40.4 percent of total vegetation cover. Agassiz bluegrass comprised nearly one-half of this total. <br />Native perennial forbs contributed 10.4 percent of total vegetation cover. Together, timber <br />milkvetch (Astragalus miser var oblongifolius), chokecherry lupine (Lupinus prunophilus), <br />oneflower wood sunflower (Helianthella uniflora) and James starwort (Pseudostellaria jamesiana) <br />accounted for more than one-half of the total. A total of 28 species of native perennial forbs were <br />found in this area. Introduced annual and biennial forbs accounted for 2.6 percent of total <br />vegetation cover. Introduced annual grasses accounted for 0.9 percent. Introduced perennial <br />forbs contributed 0.7 percent while introduced perennial cool season grasses accounted for 0.5, <br />moss accounted for 0.3 and native annual and biennial forbs accounted for 0.2 percent of total <br />vegetation cover. <br />Total vegetation cover was 52.2 percent. Standing dead, litter, bare soil, and rock cover values <br />were 8.1, 22.6, 16.8 and 0.3 percent respectively. Species density averaged 25.5 species per <br />100 sq. m. <br />Herbaceous Production (Table 9) <br />Total herbaceous production was 389.5 pounds per acre. <br />