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• 2.5.3 Collection end Analysis of Production Data <br />Circular plots one meter square in area were used for production <br />estimates. The current year's growth of all herbaceous plants was clipped. <br />All greminoids were cut and sorted by individual species while fortis were <br />combined into a single category, Each production plot yielded one composite <br />Semple, <br />In the laboratory, clippings were oven dried at 105°C for 24 <br />hours and weighed to the nearest tenth of a gram. Data were recorded as <br />grams per square meter Ig/m21 and Converted to pounds per acre Ilb/act using <br />the multiplier of 8.91. Statistical adequacy requirements for production <br />were calculated using the OSM formula above, except that mean production was <br />used in place of mean cover. <br />2.6 Plant Species Collection end Identification <br />Plant species were collected throughout the 1980 growing season. <br />Species were itlentified by field ecologists conducting the study and con- <br />firmed by Dr, William A. Weber, Curator of the Herbarium, University of <br />Colorado. Taxonomic nomenclature follows Weber end Johnston 119791. <br />Weber 119761, Nickerson et el. 119761, USDA (19791, USFS 11976), and Beetle <br />were consulted in en attempt to apply the most widely utilized common names. <br />• The presence or absence of primary selenium indicators are in accortlance <br />with WDEQ Guideline No. 2 es revised March 1979. Noxious weed designators <br />follow Thornton et el. 119741. Statements of origin or provenance follow <br />Weber and Johnston 11979) and other sources. Voucher specimens have been <br />preserved in a reference collection. <br />2.7 Species Diversity Calculations <br />Species tliversity or richness indices for each affected and reference <br />community were determined with the Formula <br />species richness = s/log N, <br />where 5 equals the number of species in a sample and N equals the total <br />number of individuals Itransectsl in a sample IWhittacker 1975). Equit- <br />ability indices were determined for each community using the formula <br />CN) 1091 N1, <br />where n; equals the cover value for each species encountered in a community <br />end N equals the total vegetation cover in a community. <br /> <br />-5- <br />