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• shrub rover is nearly identical (52.2 ~ vs. 51.2 ~ cover ,respectively). Almost all the shrub <br />cover in the Mountain Brush reference area is wmprised of Oambel osl: (22.2 ~ cover), <br />Saskatoon serviceberry (16.0 R cover), entl mountain snowberry (1 1.3 ~ cover), es is the <br />case in the study Brea <br />The major difference between the Mountain Brush reference area and the study area Mountain <br />Brush vegetation type is the greater abundance of perennial graminoids in the reference area <br />(22.7 vs. 10.4 ~ cover). The major cromponents of reference area perennial graminoitl cover <br />are Kentucky bluegrass (15.3 cover) end elk sedge (5.6 ~ cover). Perennial forb rover in <br />the Mountain Brush reference area totals 19.2 ~ ;major contributors to this cover are <br />beebelm (Mon r fistulosa, 9.0 ~ cover), nettleleaf giant-hyssop (2.0 ~ cover), and brecY.en <br />fern (1.8 ~ cover). <br />Production in the Mountain Brush reference area totaled 72.7 gm / sq.m. (698 lb/ aura). This <br />total is somewhat less than this vegetation type in the effected area (778 lb/acre) possibly due <br />to the relatively greeter abundance of law-production short graminoids, especially elk sedge, <br />and the relative scarcity of rank forb growth in the reference area. This difference is in turn <br />probably related to the fart that the slightly more than 50 ~ of the shrub cover in the reference <br />area is in the form of tail over-arching Oambel oaf: and Saskatoon serviceberry, while in the <br />study area, the nearly identical shrub cover is composed of compact, dense shrubs with <br />considerable well-lighted open areas between. The major species in the reference area <br />production data were elk sedge (13.3 gm / sq.m.), Kentucky bluegrass (14.2 gm / sq.m.), and <br />beardless wildrye (8.0 gm / sG.m. ). Important individual forb species included nettleleaf <br />giant-hyssop, linear-leaved wormwood, and bee Dalm. <br />Average total shrub density in the Mountain Brush reference ares was 68.3 stems / 50 sq.m <br />(5528 stems / avre). The major contributors to this total were Saskatoon serviceberry, <br />chokecherry, and Gambel oak. <br />3.1.7 S40EBRUSIi REFERENCE AREA <br />As was mentioned earlier in the descriptign gf the Sagebrush vegetation type, it has sustained <br />. and continues to experience fairly heary grazing use by livestock. By rnmparison, the <br />Sagebrush reference area (Figure 10) has received little or no grazing use since the late <br />-21- <br />