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RULE 2 PERMITS <br />For further details on Soil/Moisture relationships in determining vegetation communities refer to <br />Figure 2.04.10-1, Environmental Gradient/Plant Tolerance Graph. <br />Mountain Shrub Communi <br />The mountain shrub community is characterized by varying densities of serviceberry <br />(Amelanchier alnifolia), GambelI's oak (Quercus gambelii), and chokecherry (Prunus <br />virginiana). During 1980 and 1988, overall woody plant density for the mountain shrub <br />community was determined to be approximately 6,970 and 6,370 plants per acre respectively. The <br />woody plant density for additional species is contained on Table 2.04.10-6, Woody Plant Density. <br />The density measurements for snowberry, involve many of the same problems in the mountain <br />shrub community as encountered in the sagebrush community. Large clumps of snowberry were <br />encountered making measurements of individual plants very difficult. <br />The growth form of this community is characterized by an overstory of shrubs ranging in height <br />from two to twelve feet. Typically, serviceberry and Gambell's oak are the predominate overstory <br />throughout the community. Serviceberry can be found in open to dense stands while Gambel's oak <br />tend to be found -in dense stands. On north facing slopes and in drainages where soils are deeper <br />with higher soil moisture conditions, moderately dense to dense stands of chokecherry are found. <br />Throughout the mountain shrub community, snowberry is the most common associated shrub <br />found in open to dense stands. <br />Numerous forbs and grasses occur in varied densities throughout this diverse community. The <br />most abundant grasses are Kentucky bluegrass (Poa pratensis), western wheatgrass and needle <br />and thread grass (Stipa comata). The most abundant forbs are lupine, yarrow, bedstraw (Gallium <br />spp.), and American vetch (Vicia americana). For 1980 and 1988 the total herbaceous cover for <br />the community was determined to be 41.9% and 56.67% respectively: For specific cover values <br />for individual species refer to Table 2.04.10-2, 1980 Herbaceous Cover by Species and Table <br />2.04.10-3, 1988 Herbaceous Cover by Species <br />For 1980 and 1988, the total herbaceous production for the mountain shrub community was <br />determined to be 569.0 and 933 pounds per acre respectively. According- to these production <br />figures, the carrying capacity in AUM's, assuming 1,000 pounds of air dry forage per AUM at <br />50% utilization, would be .28 and .47 AUM's per acre. <br />Based on the determination by the Bureau of Land Management of an average production of .18 <br />AUM's per acre for the mountain shrub type in this area it is evident that the condition of the <br />mountain shrub community within the permit area is good. <br />Grazing has not occurred from the initial lease area since 1977 so it is anticipated that the condition <br />of the mountain shrub community will remain stable or improve. Grazing on the permit area <br />addition should be discontinued in 1991. <br />Rule 2 Permits 2.04.10-3 Revision Date: 7/23/18 <br />Revision No.: TR -123 <br />