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OOi~ARISON WITH NATIVE VF.GETATICN TYPFS <br />• Stamaly rover and production data and Shannon-Weiner diversity indices <br />are presented for adjacent native undisturbed upland sagebrush and mixed <br />brush type/aspen subtype vegetation, the two major vegetation types in <br />the Seneca II Mine permit area and in the Vegetation Baseline Report <br />(Mariah Associates, 1980). Revegetation area data were oong~ared to <br />native area data to provide a descriptive index of the degree to which sur- <br />face mined sites have been successfully revegetated (i.e., the ultimate <br />revegetation goal is to restore baseline Dover, production and species <br />diversity). <br />Total vegetation basal rover was lower on the revegetation plot than either <br />native area (9.38 on revegetation plot vs 15.9 and 22.3 for mixed brush <br />type/aspen subtype and upland sagebrush, respectively). However, percent <br />bare ground was only slightly higher on the revegetation area (28.08 Vs <br />24.2 and 27.18 for mixed brush type/aspen subtype and upland sagebrush, <br />respectively). <br />Total production on the revegetation plot (1459.4 lbs/acre) was higher <br />than that evidenced by the upland sagebrush native area (1103.3 lbs/ <br />acre) but laver than that shown by the mixed brush type/ashen subtype <br />(1818.9 lbs/acre). However, the ~ntribution by the shrub stratum to <br />total production was 75.38 for the mixed brush type/aspen subtype and <br />56.6$ for upland sagebrush; shrubs wntributed less than 28 of the total <br />production on the revegetation plot. <br />The species diversity index was lower for the revegetation plot, 2.10 <br />vs 2.72 for mixed brush type/aspen subtype and 2.56 for upland sagebrush <br />native areas. This muld be a reflection of the dominance imposed by <br />alfalfa in cover and production samples on the revegetation plot. <br />SE® I•iL`CTURE SUCC3;SS EVALCTATICN <br />. All species planted in seed mixtures were enwuntered on the revegetation <br />plot. However, only 9 of 15 species seeded (Table 1) were represented <br />-17- <br />