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• <br /> <br />Perusal of Tables V12 and Chart V4 indicates that the estimated woody plant density in this area <br />was 2,373 woody plants per acre. The shrub lifeform accounts for 94% of the total (2,233 plants per <br />acre) with the remaining 6% attributed to trees (140 per acre). Wyoming big sagebrush was the <br />dominant woody species with 1,572 plants per acre followed by low rabbitbrush at 335 per acre. <br />3.4.3 Study Area - Reference Area Comparability <br />Review of Table V2 indicates that the total vegetation ground cover and production for the Juniper <br />Scrub baseline study area is comparable to the values obtained from the Juniper Scrub reference area. <br />These comparisons of the "tabular" versus "calculated" t-statistics on Table V2 also indicate success <br />given the Students t-test indicated by the guidelines. A two-sided t-test for two independent samples <br />was considered appropriate and the decision rules for this test were: <br />If 1* t(o.95,n1+n2-2) , conclude that the two areas are unequal, and <br />If 1* < t(o.95,n1+n2-2), conclude that the two areas are equal (for a = 0.05). <br />The tabular t values for an a = 0.05 and n-2 degrees of freedom (d.f.) and calculation of the <br />comparison t* statistic for comparison are as follows: <br />Variable tabular t value t* statistic <br />Vegetation Cover 2.0086 1.3726 <br />Production 1.9785 1.9218 <br />Comparison of the calculated t-statistic (1*) for the two areas with the respective tabular tvalues <br />indicates that in each case 1* is less than t This results in the conclusion that the total vegetation <br />ground cover and production for the Juniper Scrub baseline study area is comparable (equal) to the <br />values obtained from the Juniper Scrub reference area. <br />3.5 Mountain Shrub Community <br />This community type comprises 5,017.9 acres (36.88%) of the vegetation study area as indicated on <br />Map V1. The mountain shrub community is primarily found at higher elevations occupying the relatively <br />flat uplands (xeric sub-type), steep southern facing slopes (also xeric sub-type), and steep northern- <br />facing slopes (mesic sub-type). As indicated on Table V1, a total of 102 plant species were documented <br />from this community type in the baseline study area and 36 taxa in the reference area. No sensitive <br />species were observed within this area, while the noxious weeds Canada thistle and houndstongue were <br />CIE]IDA]P =1KASSUCRA 25, INC. Page 25 2005 Collom Vegetation Survey