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<br />_25_ <br /> <br />VEGE1'ATICN TYPE DESC.RIPTI~15 <br />The following discussion provides general descriptions of each vegetation <br />type surveyed on the study area using previously presented data. 7b <br />assist in the evaluation o£ species diversity for each vegetation wnmuiity, <br />Sharron-Weiner diversity irdices are presented in Table 7. The basis for <br />mach of the vegetation type description is cover and production data. <br />These data were evaluated for sanpling ads~uacy using the following fornula: <br />N > 2 (s z) 2 <br />mrn (d X)2 <br />w112ra: <br />N~ = mininean rnmber of Dover quadrats, production exclosures or <br />tree density transacts to achieve sampling adequacy. <br />x = sample mean of pra)uction per exalosure or percent basal Dover <br />• per quadrat <br />z =statistic (z = 1.28 for 908 confidence level and 0.84 £or 808 <br />confidence) . <br />d = amount of reduction it is desire3 to detect (d = 0.1 for 908 <br />wnfidence and 0.2 for 908 confidence) . <br />Substitution of the actual sample size for min and solving for z provides <br />a means for deterniining the actual confidence limit achieved. <br />Consider the shrubland type with a Wean production of 102.6 lbs/acre <br />with a standard deviation of 62.7 lbs/acre for 20 production .samples. <br />Deternunation ~of Nr~ at the 808 mnfidence level is providgl by <br />N > 2 (62.7 x 0.84)2 <br />min = (0.2 <br />N > 13 <br />mrn = <br /> <br />I • <br />(Revised March 2006) Attachment 2.05.6(2}1-30 <br />