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4-119 <br />• one mile to the north in Section 21, T7S, 4102W. See <br />Figure 4.8-2. ~ (~y~? <br />Total percent cover is higher in the reference area (63.3 <br />percent) than the affected area (47.0 percent). Cover in <br />the reference area is dominated by shadscale saltbush and <br />cheatgrass as is true for the affected area. See Tables <br />4.8-10 and 4.6-24. <br />Production in the reference area is comparable to the affected <br />area and averages 70.1 g/m2 or 625 pounds per acre compared to <br />666 pounds per acre in the affected area. cheatgrass is the <br />dominant producer in the reference and affected areas. See <br />Tables 4.8-11 and 4.8-25. <br />Total shrub density in the reference area averages 2,684 shrubs <br />per acre or about half the shrub density (4,603 per acre) in <br />the affected area although shrub species composition is similar. <br />See Tables 4,8-12 and 4.8-26. <br />Species richness is higher in the reference area (index = 8.50) <br />than the affected area (6.92). Equitability is nearly identical <br />in the reference and affected areas (0.62 and 0.61, respectively). <br />As in the affected area the low species richness is attributable <br />to the extreme environmental conditions of these south-facing <br />slopes. See Table 4.8-6. <br />• <br /> <br />