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• • Vegetatior Information <br />The second smdy was performed on June 6, 1992, by the Colorado Native Plant Socie.y (CONPS). <br />This study surveyed the Aiken Canyon area located about a mile or so northeast of this site. Ecologically, <br />the two sites have similarities and differences, but floristically the sites should have many species in <br />common. <br />The third survey was performed specifically for this amendment. It not only searched for what is <br />growing in the amendment area, but also attempted to verify the 1985 study and seazch for many of the <br />species listed as present in Aiken Canyon but were not noted in the 1985 smdy. By combiung the three <br />studies and comparing the species lists, floristic and general ecological differences and similarities among <br />the three sites can be described. The main comparison, however, is between this site and P.iken Canyon as <br />they are most similar with respect to elevation. <br />V/hen the three lists are compared, the following similarities and differences in floristic; presence are <br />seen. <br />Number of Species in Presence Lists <br /> <br />Total species in Aiken Canyon list = 138 <br />Total species in Menzer Site list = 99 <br /> <br /> in common different <br />Aiken vs. 1985 45 33 <br />Aiken vs. 1995 42 40 <br />1985 vs. 1995 64 35 <br />Aiken vs. Menzer 53 39 <br />To some extent these differences are due to the larger area of the Aiken Canyon surve:~ and seasonal <br />differences due to surveys being made at different times of the year. The well known species~area <br />relationship should produce more species in Aiken Canyon than on the smaller Menzer Site. The Aiken <br />Canyon list and the 1995 sttrvey list of the Menzer Site should be most similar as they were made at very <br />nearly the same time of year. That is, those two floristic patterns should be reasonably representative of <br />how similar the two sites are. The table of species in common and different shows that although the sites <br />are similar topographically and elevationally, there is a considerable difference floristically This may be <br />due to the unique nature of Aiken Canyon while the Menzer site is more representative of the floristics of <br />the region as a whole and does not exhibit any strikingly unusual characteristics. <br />Menzer Quarry Amendment Exhibit J Page 2 <br />