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32 <br />• Table 7. Density means (x) and oercent (a) of shrubs (per mz), <br />~ trees and saplings (per hectare) for the affected area and reference <br />area of the Ponderosa Pine-Douglas Fir-Oak vegetation type. Allen <br />Mine, CF&I Steel Corporation, July-August, 1981. <br />Species or Affected Area Reference Area <br />Category x % x q <br />Shrubs <br />Cercocarous montanus 1.1 26 0.5 16 <br />Quercus aambelii 1.5 35 2.2 60 <br />Ribes inerme 1.4 32 0.6 16 <br />Rosa moodsii -- -- 0.1 3 <br />Sumphoricarpas oreophilus 0.3 7 0.2 5 <br /> <br /> X S X 5 <br />Total Shrub Density <br />--------------- 4.4 <br />----- 2.8 <br />----- 3.8 <br />--- <br />-- 2.6 <br />------ <br />--------------- ----- <br />X ----- <br />n _ <br />----- <br />X ------ <br />Trees <br />Abties concolar 20 2 _- -- <br />Juniperus scopulorum 20 2 40 2 <br />• <br />Pinus edulis 80 7 80 5 <br />~ <br />Pinus oonderosa 240 20 120 7 <br />Pseudotsuga menziesii 160 13 40 2 <br />Slings <br />Abies concolar 40 3 -- 0 <br />Juniperus scopulorum 80 7 160 10 <br />Pinus edulis 140 11 40 Z <br />Pinus ponderosa 180 15 200 12 <br />Pseudossuga menziesii 260 21 1000 60 <br /> x 5 z s <br />Total Tree and Sapling Density 1220 476 1680 879 <br />•` <br />