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• Shrub Density and Height <br />Total shrub density in the Mountain Shrubland affected area is <br />high, averaging 45.9 shrubs/50 m2 or about 3,715 shrubs/acre.` Approximately <br />65 percent of the shrub density is comprised of Gambel oak. OTher major species <br />are, in descending importance, common chokecherry, mountain snowberry, and <br />squaw-apple (Table 51. <br />Average shrub heights range from about 191 cm for Gambel oak to <br />57 cm for big sagebrush. The average height for common chokecherry is about <br />88 cm. Mountain snowberry and squaw-apple average 64 and 118 cm, respectively. <br />Tree Density <br />Total tree density is 9.8 trees/acre. Pinyon pine accounts for <br />63 percent of the total (6.2 trees/acre), Utah juniper accounts for 2.5 trees/ <br />acre, antl narrowleaf cottonwood (lvpu.lu~ artgu~tl~v.lial accounts for 1.1 trees/ <br />acre (Table 61. <br />3.2.2 Pinyon-Juniper Woodland <br />The Pinyon-Juniper Woodland vegetation type occurs on moderate to <br />relatively steep slopes of the permit area on coarse and/or shallow substrates. <br />This vegetation type occupies 73.6 acres. The dominant species in this type <br />are pinyon pine and Utah juniper which occur in moderately dense to open <br />• stands. The understory includes numerous species of shrubs as well as forbs <br />and grasses, although the latter contribute little cover. <br />Cover <br />Total absolute cover averages 47.3 percent. Bare soil is relatively <br />high with 20.8 percent, litter cover is 19.2 percent, and rock is 12.7 percent. <br />Absolute cover by lifeform is as follows: trees--30.6 percent, shrubs and <br />subshrubs--9.2 percent, perennial forbs--3.6 percent, perennial graminoids-- <br />3.0 percent, annual forbs--0.5 percent, and cryptogams--0.4 percent (Table 71. <br />Trees comprise almost 60 percent relative cover. Pinyon pine is <br />prevalent with 20.0 percent cover, while Utah juniper adds 10.6 percent cover. <br />Shrubs and subshrubs are abundant, comprising over 20 percent of <br />the vegetation cover. Major species are big sagebrush with 2.4 percent <br />absolute cover, Gambel oak with 2.1 percent, True mountain mahogany with <br />1.7 percent, antelope bitterbrush (%u.¢~hia .tit.<den#a#dl with 1.3 percent, and <br />squaw-apple with 0.7 percent. Less common species present, in descending <br />order, are cliff fendlerbush, skunkbush sumac, broom snakeweed (Su#ienite~ia <br />~d2vthaael, Utah serviceberry IAmelaachieit u#oherr~ial, and rubber rabbitbrush <br />(Ch~t~av#hamnue avu~evau~l. <br />Perennial forb cover is moderate, and numerous species are present. <br />Common species are hairy goldenaster, pingue INymeavxt~a zichv.ad.~vaiil, and <br />• toadflax penstemon with 0.9 percent cover each. Less common species contributing <br />-10- <br />