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n <br />• <br />PRODUCTION <br />(Table 2) <br />Total herbaceous production in 2005 was 1,631 pounds per acre. Of this, 1,515 pounds were <br />Introduced perennial cool season grasses. Introduced perennial forts and native perennial cool <br />season grasses contributed 75 and 36 pounds per acre, respectively. <br />WOODY PLANT DENSITY <br />(Table 3) <br />Total average woody plant density in 2005 Bond Release Block 1 was 890 stems per acre. <br />Rubber rabbitbrush (Chrysothamnus nauseosus) was the densest at 801 stems per acre. Two <br />other species of shrub, big sagebrush (Seriphidium tridentatum) and mountain snowberry <br />(Symphoricarpos rotundifolius), were present with densities of 75 and 14 live stems per acre, <br />respectively. <br />Bond Release Block (BRB) 2 <br />(Photographs 5-8) <br />COVER <br />(Table 4) <br />Introduced perennial cool season grasses were the predominant lifefonn observed in Bond <br />Release Block 2, contributing 26 percent toward total first-hit vegetation cover. Of this, half (13 <br />percent) was smooth brome (Bromopsis inermis) and half (13 percent) was intermediate <br />wheatgrass (Thinopyrum intermedium). Introduced perennial (orbs contributed 11 percent toward <br />total first-hit vegetation cover. This total was predominantly composed of alfalfa (Medicago <br />sativa). Additionally, native shrubs contributed 4 percent toward total first-hit vegetation cover, <br />consisting primarily of big sagebrush (Seriphidium tridentatum). Also observed in the area were <br />musk thistle (Carduus nutans ssp. macrolepsisj, houndstongue (Cynoglossum officinale), and <br />Canada thistle (Breea arvensis). <br />15 <br />