Laserfiche WebLink
otherwise stated, all cover values are for absolute first -hit data only. Percentages are rounded to facilitate <br />discussion of the results. <br />2011 Phase 111 BRB -5 <br />(Photographs 1 through 8) <br />COVER <br />(Table A -1) <br />Introduced perennial cool season grasses were the predominant lifeform observed in Area BRB -5, <br />contributing 23.4 percent total first -hit vegetation cover. Of this, intermediate wheatgrass (Thinopyrum <br />intermedium) contributed the most with 16.4 percent followed by smooth brome (Bromus inermis) with 2.9 <br />percent first -hit vegetation cover. Introduced perennial forbs were the second most observed lifeform <br />contributing 17.8 percent total first -hit vegetation cover, composed predominately of alfalfa (Medicago <br />sativa). Additionally, native perennial cool season grasses contributed 8.8 percent first -hit vegetation <br />cover, consisting primarily of basin wildrye (Leymus cinereus) and western wheatgrass (Pascopyrum <br />smithii). Also observed in the area were the noxious weeds whitetop (Cardaria draba), hound's tongue <br />(Cynoglosum officinale), scotch thistle (Onopordum acanthium), Canada thistle (Breea arvensis) and <br />Dalmatian toadflax (Linaria genistifolia ssp. dalmatica). <br />Total average vegetation cover for first -hits was 63.5 percent. Allowable first -hit herbaceous vegetation <br />cover was 59.7 percent. Cover by standing dead, litter, bare soil and rock averaged 0.1, 17.5, 16.3, and <br />2.6 percent, respectively. Average species density was 25.7 species per 100 sq. m. <br />PRODUCTION <br />(Table A -2) <br />Total herbaceous production in 2011 was 2,193.0 pounds per acre. Of this, 815.5 pounds were <br />introduced perennial cool season grasses. Native perennial cool season grasses and introduced <br />perennial forbs were the only other lifeforms functioning as significant producers, contributing 685.2 and <br />439.0 pounds per acre respectively. Five other lifeforms were present, each less than 100 pounds per <br />acre. <br />13 <br />