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<br /> <br /> <br />STUDY AREAS <br />The Allen Mine permit area included the Ponderosa pine-oak, <br />Ponderosa pine-Douglas fir-oak, and willow carr vegetation types. <br />The Ponderosa pine-oak vegetation type occurred on a north-facing <br />slope of about 27° with an elevation of 7500 ft. It was character- <br />ized by pure stands of Ponderosa pine (Pinus ponderosa) interspersed <br />with patches of Gambel oak (Quercus gambelii). Other overstory spe- <br />cies were pinyon pine (Pinus edulis) and Rocky Mountain juniper <br />(Juniperus scopulorum). Other shrub species were snowberry <br />(Symphoricarpos oreophilus) and mountain mahogany (Cercocarous <br />montanus). Understory species consisted of annual and perennial <br />fortis and grasses such as Carex sp., Parry oatarass (Danthonia parryi), <br />side-oats arama (Bouteloua curtipendula), blue grama (Bouteloua <br />racilis), elegant cinquefoil (Potentilla concinna), star gentian (Swertia <br />radiata), and Fendler meadowrue (Thalictrum fendleri). Openings in <br />the tree canopy were dominated by Gambel oak and occasional stands <br />of mountain mahogany. Parry oatgrass formed tussocks in the openinns. <br />The soil was a light brown sandy loam. <br />The Ponderosa pine-Douglas fir-oak vegetation type was located <br />on a north-facing slope at 7600 ft. elevation and with a slope of 30°. <br />It consisted of an overstory of mainly Ponderosa pine (Pinus ponderesa) <br />and Douglas fir (Pseudotsuga menziesii). Other tree species were <br />pinyon pine (Pinus edulis) and Rocky Mountain juniper (Juniperus <br />scooulorum). Gambel oak (Quercus gambelii) was a major shrub species, <br />2 <br /> <br />