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• Species Composition <br />Species composition information was computed from vegetation cover data. Relative <br />cover information provided a basis for evaluation of the importance of each <br />encountered plant species. <br />SAMPLE NUMBERS/SAMPLE ADEQUACY <br />For the purposes of this monitoring, set numbers of samples were established for the <br />parameters to be sampled by CDMG and Coors Energy Company. In the revegetated <br />azea, ten cover transects were collected per reclamation year, and fifteen herbaceous <br />production quadrats were collected per reclamation yeaz. In the Osgood Sand <br />Reference Area, ten cover transects were collected, and fifteen (15) herbaceous <br />production quadrats were collected. <br />Since the purpose of this sampling was the monitoring of the vegetative condition at the <br />revegetated areas of the mine and Osgood Sand Reference Area, sampling need not <br />meet sample adequacy requirements. Minimum sample sizes and standazd deviation are <br />reported as an indication of variability of the sampled parameters. Comparisons <br />between sample mean parameter values assume that the sample mean value accurately <br />represents the population mean in all cases. <br />• SPECIES mENTIFICATION AND VERIFICATION <br />Species identification was accomplished in the field through the use of plant <br />identification keys (Weber, 1990; Whitson, 1987; Stubbendieck, et a/, 1981). In cases <br />where plant idenfification was inconclusive in the field, voucher specimens were <br />pressed for lab identification. Final plant species identification was undertaken by <br />Dr. William Weber, Curator Emeritus of the University of Colorado, Boulder <br />Herbarium. <br /> <br />_¢ <br />