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• Rule 2: Perntilt <br />d = 0.1 (level of precision for estimate of the mean to be within 10 percent of the actual <br />mean), and <br />x = sample mean. <br />Point-intercept data will be used to calculate the following parameters for each community type <br />in potentially affected areas and reference areas: cover (frequency), relative cover, and diversity. <br />The percent total vegetative cover calculation is as follows: <br />% total vegetative cover = # hits on vegetation x 100 <br />Total # of Points <br />The composition of plant species in each azea will be evaluated using the vegetative cover data. <br />The following calculation will be used to determine the relative cover of each species per area: <br />% relative cover of species x = % Cover of Species x <br />% Total Veg. cover <br />Species Diversity <br />Species diversity data will be gathered from the point-intercept cover data collection. Species <br />diversity includes the total number of species hit along the transect. A species list of those plants <br />observed during the field investigation will be developed. <br />Shrub and Tree Density <br />In conjunction with the collection of cover data on the disturbed and reference areas, a 5 meter <br />wide belt transect will be established running the entire length of the 50 meter point-intercept <br />cover transect. Smaller or larger transects may be employed within each reclaimed area depending <br />on the area to be sampled and specific sampling parameter goals. Woody plant density will be <br />determined by counting each individual woody stem within the 5 x 50 meter belt transect. Woody <br />plant density values will be presented as woody plant stems per transect and the extrapolated value <br />of woody plant stems per acre. Plants that aze prone to suckering (e.g. Gamble's oak and <br />mountain mahogany) will be sampled by counting each individual woody stem that falls within the <br />belt transect. This method is consistent with the baseline collection of woody plant densities in <br />which individual stems were counted, regardless if multiple stems originated from an individual <br />root crown. <br />LCC proposes revegetating shrub plots on approximately ten percent of the surface mine grassland <br />area (mine phase areas 1997 through 2002) (Figure 2.05.4-19a). Two to three shrub transplant <br />azeas will be established in each successive yeaz of reclamation. Shrub sampling will be conducted <br />• <br />TR-o,2 <br />renMir...,nnP,~ixi, iv9e 2.05-73 (revised 4/21/98) <br />