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• <br />3.0 RESULTS <br />Vegetation species compositton, cover, and production is highly <br />variable throughout the pinyon-junlper type (Plate 1) on the study area, <br />depending on the micro environmental conditions at each ape cifte site. <br />Site characteristics range from barren knolls to small pockets of dense <br />oakbruah understory vi thin the pinyon-junlper type. <br />Approximately 39.0 acres of the picryon-juniper type to be affected in <br />the Revision 1 Area and 8.6 acres of undisturbed pirryon-juniper type in the <br />Barren Ridge area were quantitatively sampled. <br />3.1 SPECIES LLST <br />A List of plant species encountered in the pinyon-juniper type Ss pre- <br />sented in Appendix B. The pinyon-juniper type on the study area is pro- <br />bably not suitable habitat for any of the five plant species currently <br />listed by the U.S. Fish and G111dlife Service (1982) as Threatened or <br />• Endangered in Colorado, however three species presently identified as <br />lacking sufficient information to make a determination on their status have <br />been reported from the general area (Scott Peterson, The Nature <br />Conservancy, personal communication, July 1983). These species are <br />Atriplex pleiantha, Lesauerella pruinosa, and Phlox carriofila. Yery <br />little work has been conducted to determine the abundance and distribution <br />of these three species in the general area (Scott Peterson, The Nature <br />Conservancy, personal communication, July 1983). These three species have <br />not been reported on the study area, however these species could not have <br />been identified during this or previous studies due to the time of growing <br />season in which the studies were conducted. <br />3.2 SAHPLE ADEQUACY AND SUITABILITY OF REFERENCE AREA <br />A summary of sample adequacy for all quantitative vegetation baseline <br />data collected 1s presented in Table 3.1. Sufficient samples were taken to <br />meet the required 80x confidence level (d-.1) for all except the produe- <br />tivity and tree density data (Table 3.1). The Nmin value for productivity <br />date on the affected area vas 222; Nan vas 204 for the reference area. <br />