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ALL column in data tables) was calculated by dividing all hits (first -hits and additional -hits) for a particular <br />species by the total number of points taken (100). In addition, all -layer relative cover was calculated <br />using all hits for a particular species, divided by the total hits accumulated during sampling of the transect. <br />Lifeforms Used in Data Presentation <br />To enhance understanding of collected data, all data and summary tables are organized by lifeform. <br />Lifeform categories used here reflect growth habit and provenance (place of origin). Categories observed <br />in 2010 were: native annual and biennial forbs, introduced annual and biennial forbs, introduced annual <br />grasses, native perennial forbs, introduced perennial forbs, native perennial grasses and graminoids, <br />introduced perennial grasses, native shrubs, native trees, ferns (and fern allies), and lichens. <br />Plant Species Frequency and Density Measurements <br />During the course of cover sampling, all plant species occurring within one meter of either side of the <br />cover sample transect were noted as present. Frequency for each plant species observed during <br />sampling was calculated by dividing the number of sample transects in which the species was observed <br />by the total number of samples (see cover sample distribution by area above). As such, this value is <br />probably more correctly known as constancy. <br />The total number of species within each lifeform observed in each 100 square meter sample provides a <br />measure of "species density ", indicating the relative species richness of different areas. These measures <br />provide a means of examining progress toward the return of diverse species composition in the reclaimed <br />areas. <br />Plant Species Listing <br />Scientific names used follow Weber and Wittman (1996); common names cited are found in Beetle <br />(1970), Nickerson et al. (1976), or Soil Conservation Service (1979). Cross - references between older <br />names and the revised scientific nomenclature for the flora of Western Colorado used here can be made <br />by reference to Appendix 2 of this report. <br />During the course of the fieldwork, a list of all plant species encountered (quantitative plus incidental <br />observations) was compiled for the reclamation area and the two reference areas. These lists are <br />summarized in Appendix 2, Species Presence for All Areas, which includes current nomenclature and <br />cross - references to older nomenclature. Note that all big sagebrush plants encountered were referred to <br />as Seriphidium tridentatum. Plants referred to here as Poa secunda are the plants formerly known as big <br />bluegrass (Poa ampla) that were included in the seed mixes as such. The taxonomic treatment of Weber <br />and Wittmann (1996) places Poa ampla (as well as Poa sandbergii) with Poa secunda. Despite this <br />merger, the distinctness of Poa ampla is worth noting. <br />3 <br />