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difference with regard to species density is in the native perennial (orbs category, where native <br />areas (at least the most extensive native types of Mountain Brush and Sagebrush) tend to have <br />. half again to twice as many species of native perennial forbs per 100 sq.m. 2003 data from the <br />1999 reclamation areas shows that total native species density has risen by over three species <br />per 100 sq.m. compared to 2001 (ESCO 2002). Total native species density in the 1996 <br />reclamation areas was 21.1 species per 100 sq.m. in 2003, essentially the same as it was in year <br />2000 (21.2 species per 100 sq.m.; ESCO 2001) and greater than native species density in two of <br />the three reference areas. <br />Sample Adequacy <br />A summary of sample adequacy calculations for the parameters of cover, herbaceous production, <br />and woody plant density is presented in Table 16 (Appendix 1). As can be seen in this table, the <br />data sets for cover in the reclamation areas as well as the extended reference areas all achieved <br />sample adequacy. <br />Herbaceous production data sets were statistically adequate at the prescribed levels (see <br />Methods) in three of five cases. As usually is the case, the woody plant density data were <br />sufficiently variable that the data set failed to meet sample adequacy by a wide margin. However, <br />the approximation of means with a small sample was all that was needed to effectively check <br />status of woody plant density in the 2003 monitoring. <br />L._.J <br />13 <br />