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<br />o <br />o <br />W <br />N <br /> <br />common species are: basin big sagebrush (Artemisia tridentata var. tridentata), wyoming <br />sagebrush (Artemisia tridentata var. wyomingensis), and black sagebrush (Artemisia nova). The <br />aspect of the typical sagebrush community is fairly dense to open vegetation with relatively large <br />(2-4 feet high) non-spiny shrobs, with perennial and annual grasses such as; indian rice grass, <br />galleta, bottlebrush squirreltail, needle and thread grass, blue grama (Boutalua gracillis), and <br />western wheat grass (Agropyron smithii), The following annual grasses and perennial and <br />annual forbs may also be present to varying degrees: cheat grass, six-weeks fescue, <br />globemallow, pepper grass, tansy mustard, and buckwheat. <br /> <br />Ecological sites found in this community are: <br /> <br />Loamy bottom <br />Semi-Desert loam (Wyoming big sage) <br />Semi-Desert very steep loam (Wyoming big sage) <br />Upland loam (Basin big sage) <br /> <br />Production on ecological sites in this community range from approximately 2500 pounds per acre <br />in favorable years to 400 pounds per acre in poor years, with an average production of about <br />1000 pounds per acre during nonnal years. <br /> <br />Vegetative manipulation treatments on ecological sites within this community have good potential <br />for success due to the higher precipitation and deeper more well developed soils except in areas <br />with steeper slopes (> 15 %). Some associations of this community are in transitional zones <br />between the pinyon-juniper and grassland communities and also have good potential for <br />vegetative treatment. Recommended treatments are; intensive grazing management, various <br />chemical and mechanical treatment projects, and prescribed fire. <br /> <br />BLACKBRUSH - TItis community occupies a narrow altitudinal belt in the southern end of the <br />watershed generally between 4500 - 5100 feet and occurs on shallow, non-saline, sandy soils. <br />The community makes up 3 % of the watershed or approximately 4,990 acres. Annual <br />precipitation ranges from 5 to 6 inches. The blackbrush community appears as dense to open <br />stands of evergreen shrobs, interspaced with some perennial grasses. The dominate shrob is <br />blackbrush (Coleogyne ramosissima) with varying degrees of other shrobs such as; monnon tea <br />(Ephedra torreyana), shadscale (Atriplex confertifolia) and snakeweed (Gutierrezia sarothrae). <br />Some of the more common perennial grasses found in ecological sites in this community are; <br />galleta grass (Hilaria jamesii), sand dropseed (Sporobolus cryptantha) and needle and thread <br />grass (Stipa comata). Several combinations of annual grasses and annual and perennial forbs are <br />also found in associations of this community. <br /> <br />There is only one ecological site within the watershed which is exclusively dominated by <br />blackbrush but transition zones of this community may overlap into other ecological sites. <br /> <br />TItis ecological site is: <br />Desert shallow sandy loam (CORA) <br /> <br />20 <br />