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<br />intermediate wheatgrass, squirreltail, <br />and elk sedge. Native and introduced <br />g/2 m2, respectively (Table 161. <br />Indian ricegrass, needle-and-thread, <br />annual (orbs average only 0.5 and 0.3 <br />Shrub Density and Height <br />Total shrub density averages 36.6 shrubs/50 m2, or 2,962 shrubs/ <br />acre. Approximately 85 percent of the total is comprised of Gambel oak <br />131.1 shrubs/50 m21. Less common species include, in descending order, big <br />sagebrush, true mountain mahogany, and cliff fendlerbush (Table 17). <br />Tree Density <br />Total tree density is 18.6 trees/acre (Table 1B1. Pinyon pine <br />accounts for 13.1 trees/acre and Utah juniper accounts for 5.6 trees/acre. <br />These trees are young and generally are no greater than 2 m in height. <br />3.3.2 Pinyon-Juniper Woodland <br />r1 <br />U <br />• <br />The Pinyon-Juniper Woodland reference area is a square approximately <br />120 m on a side and includes approximately 3.6 acres. It occurs on an east- <br />facing slope which is bisected by a minor drainage and includes a variety of <br />microhabitats. <br />Total absolute vegetation cover averages 50.0 percent. Bare soil <br />is 9.8 percent, and litter and rock cover average 22.2 and 18.0 percent, <br />respectively. Cover by lifeform is as follows: trees--34.2 percent, <br />shrubs and subshrubs--8.2 percent, perennial graminoids--4.8 percent, perennial <br />fortis--1.6 percent, annual (orbs--0.7 percent, succulents--0.3 percent, and <br />annual graminoids--0.2 percent (Table 19I. <br />Cover <br />Trees comprise approximately 58 percent of the vegetative cover. <br />As in the affected area, pinyon pine is dominant with 21.3 percent absolute <br />cover, and Utah juniper is subdominant with 12.5 percent. Ponderosa pine <br />(lima ~wnde~oaol is a minor species. <br />Shrubs and subshrubs account for 20.0 percent of vegetative cover. <br />Gambel oak is the major species, with 6.6 percent cover. Common species are, <br />in descending order, squaw-apple, true mountain mahogany, antelope bitter brush, <br />mountain snow berry, and cliff fendlerbush. <br />Perennial graminoids are scattered throughout the understory, <br />averaging about 16 percent of the vegetative cover. Mutton bluegrass and <br />squirreltail are the most common species, with 1.9 and 1.0 percent, respec- <br />tively. Other common species, in descending order, are Indian ricegrass, <br />elk sedge, prairie junegrass,litfleseed ricegrass, sideoats grama, blue grama, <br />galleta, and needle-and-thread. <br />-15- <br />