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Table 2.3-16. Diversity Index (H') for Herbaceous Plant Species on Range Site A Basad on the Shannon <br />Weiner Index and Calculated Ft® 1980 Cover Data (1)(2) <br />-(Pilogpi) X 100 <br />Species Cover Hits Pi-(Pilogpi) H' <br />Achilles lanulosa <br />17 <br />.0881 <br />.0929 <br />9.49* <br />Agastachu articicolia <br />1 <br />.0052 <br />.0119 <br />1.22 <br />Agropyron smithii <br />5 <br />.0259 <br />.0411 <br />4.20* <br />Agropyron spicatun <br />5 <br />.0259 <br />.0411 <br />4.20* <br />Agropyron trachycaulun <br />11 <br />.0520 <br />.0709 <br />7.25* <br />Aster integritolius <br />2 <br />.0104 <br />.0206 <br />2.11 <br />Balsanorhiza sagittata <br />2 <br />.0104 <br />.0206 <br />2.11 <br />Brans spp. <br />1 <br />.0052 <br />.0119 <br />1.22 <br />Carex geyeri <br />61 <br />.3161 <br />.1581 <br />16.16* <br />Cirsiun spp. <br />1(3) <br />- <br />- <br />- <br />Eriogonun spp. <br />3 <br />.0155 <br />.0280 <br />2.86 <br />Lathyrus leucanthus <br />5 <br />.0259 <br />.0411 <br />4.20 <br />Lupinus spp. <br />4(3) <br />- <br />- <br />- <br />Poa arida <br />1 <br />.0052 <br />.0119 <br />1.22 <br />Poa pratensis <br />35 <br />.1813 <br />.1345 <br />13.74* <br />Pos spp. <br />19 <br />.0984 <br />.0991 <br />10.13* <br />Periderida gairdneri <br />1 <br />.0052 <br />.0119 <br />1.22 <br />Polygonun spp. <br />1(3) <br />- <br />- <br />- <br />Salsola kali <br />2(3) <br />- <br />- <br />- <br />•Stellaria janesiana <br />14 <br />.0725 <br />.0826 <br />8.44* <br />Stipa canata <br />3 <br />.0155 <br />.0280 <br />2.86 <br />Stipa lettenmanii <br />3 <br />.0155 <br />.0280 <br />2.86 <br />Stipa colunbiana <br />1 <br />.0052 <br />.0119 <br />1.22 <br />Vicia anericana <br />1 <br />.0052 <br />.0119 <br />1.22 <br />Viguiera multiflora <br />2 <br />.0104 <br />.0206 <br />2.11 <br />Total camnon species = 25 <br />W193 <br />.9786 <br />100.04 <br />* Comprise >73% of the herbaceous species diversity. <br />H' <br />(1) Shannon -Weiner Index <br />H' = - i pi logpi (Pielou, 1966) <br />%bene: pi = Ni/N <br />Ni = Dominance measure (cover) <br />N = the sun of all species dominance measure. <br />(2) Many diversity indices are available and the above exanple should not be considered as the final <br />choice to be used in establishing a vegetative standard. <br />(3) Undesirable plant species (annual, or poisonous to livestock), not included in calculating H'. <br />. 2-107 <br />REVISED FEB 13 '87 <br />