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<br />_g_ <br />ourrect sanq~le sizes neg3ed to Beet the specified data confidence <br />levels. Sane pre-savQle data ~~re available fin previous studies at <br />Nucla Mine and these data were closely scrutinized in atta~pts to <br />assad~le infornetion rma,+a; ~+ natural vaziation in vegetation types <br />m be sa~aled. <br />2. Because pre-sart~le data alone are seldan reliable in accurately es- <br />tablishing san~le size, a great deal of judgment based on the obser- <br />ver's experience in similaz vegetation types, other studies performed <br />in similaz types a:d interviews with other experienced ecologists, was <br />used in establishing sale sizes at Mucla Mine. Interviews with Dr. <br />iaobext Dorn of Wyaning DEQ (April, 1979) provided sane insight as to <br />the establishment of adequate sample sizes. <br /> <br />• <br />Rhus; all samgie sizes established tb study baseline vegetative corrlition <br />at Nuola Mine were de*~*+~+*~ by a oanbination of previous data, experi- <br />ence in similar vegetation types and ~;~,G~ions with experienced parties. <br />Both canopy cover (the percentage of the ground included in a vertical <br />projection of imaginary polygons drawn about the total natural spread of <br />the individual, o£ a species) and basal Dover (aggregate cross sectional <br />area of the individ~l plants taken near the ground surface) oxre re- <br />wrded for shrubs in the quadrat. Basal weer was dero.+~;,,~a for all <br />other life forms. Data were rewrded separately for each species in the <br />quadrat. As specified in Wyoming Cliideline #2 QTarch, 1979), percent <br />litter/rock and percent bare ground mere also determined for each plot. <br />DDQ 6liideline #2 (March, 1979) wnsiders both litter and rock as a part <br />o£ the ground Dover. 7b facilitate estimation and recording of data at <br />each Dover quadrat, coverage eras divided into six unequal classes and <br />the representation in each class cored by the appropriate coverage class numr <br />ber on the data sheet (Daubemnire, 1959). The midpoint of each coverage <br />class was used in the subsequent Dover data analyses as shown below: <br />(Revised March 2006) Attachment 2.05.6(2)-1-13 <br />