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PRODUCTION <br /> <br />I• <br />(Table 2) <br />Total herbaceous production in 2006 was 1,672 pounds per acre. Of this, 998 pounds were <br />Introduced perennial cool season grasses. Introduced perennial forbs were the only other <br />lifeform functioning as a significant producer, contributing 576 pounds per acre. <br />Woody Plant Density <br />(Table 3) <br />Total average woody plant density in 2006 Bond Release Block 2 was 874 stems per acre. Big <br />sagebrush (Seriphidium tridentatum) was the densest at 623 stems per acre followed by <br />mountain snowberry (Symphoricarpos rotundifolius) at 165 stems per acre. Three other species <br />of shrub were present: Douglas rabbitbrush (Chrysothamnus viscidiflorus), rubber rabbitbrush <br />(Chrysothamnus nauseosus), and Saskatoon Serviceberry (Amelanchier alnifolia). Each of these <br />had densities of fewer than 100 stems per acre. <br />Bond Release Block 3 (BRB - 3) <br />(Photographs 21 through 40) <br />COVER <br />(Table 4) <br />Introduced perennial cool season grasses were the predominant lifeform observed in Bond <br />Release Block 3, contributing 23.4 percent first-hit vegetation cover. Of this, nearly 17 percent <br />was intermediate wheatgrass (Thinopyrum intermedium) and 6 percent was smooth brome <br />(Bromopsis inermis). Introduced perennial forbs contributed 12.8 percent first-hit vegetation <br />cover. This amount was predominantly composed of alfalfa (Medicago saliva) (9.2 percent) and <br />cicer milkvetch (Asfragalus cicer) (3.6 percent). Additionally, native perennial cool season <br />grasses contributed 5.6 percent first-hit vegetation cover, consisting primarily of sheep fescue <br />(Festuca 6rachyphylla ssp. coloradensis), mountain brome (Ceratochloa carinata), and basin <br />wildrye (Leymus cinereus). <br />Total average vegetation cover for first hits was 47.0 percent. For herbaceous vegetation, total <br />average cover for first hits was 45.1 percent. Cover by standing dead, litter, bare soil and rock <br />15 <br />