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• <br />• <br />As can be seen above, the calculated indices of similarity between Expansion and Permit Areas varied <br />from 84 percent for the Western Wheatgrass /Alkali Sagebrush type to 93 percent for both the Aspen <br />Woodland and Mixed Brush types. Chambers and Brown (1983) categorized similarity values of over 80 <br />percent as indicating high similarity. Bray and Curtis (1957) concluded that sampling of homogeneous <br />areas would result in similarity indices of 85 percent or greater. <br />Indices of similarity for the comparison of the Expansion Area cover data to the Pond 009 area data <br />were also calulated: <br />Aspen Woodland (Expansion/Pond 009) <br />Component Expansion Area Value Pond 009 Area <br />Native Annual & Biennial Forbs 0.7 0.4 <br />Introduced Annual & Biennial Forbs 0.0 0.8 <br />Native Perennial Forbs 9.9 4.4 <br />Introduced Perennial Forbs 0.7 0.0 <br />Native Perennial Graminoids 3.5 13.2 <br />Introduced Perennial Graminoids 0.9 0.0 <br />Shrubs 24.0 16.0 <br />Trees 48.3 45.6 <br />Lower Plants 0.0 0.0 <br />Total Vegetation Cover 87.9 80.4 <br />TOTAL 175.9 160.8 <br />w = 0.4+0.0+4.4+0.0+3.5+0.0+16.0+45.6+0.0+80.4 = 150.3 <br />2 (150.3) <br />ISmo x 100 = 89.3 percent <br />175.9 + 160.8 <br />u <br />Mesic Drainage (Expansion/Pond 009) <br />33 <br />