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<br /> <br /> <br />page-2 <br /> <br />INTRODUCTION <br />Bird and vegetation surveys were conducted on the Little <br />Middle Creek Tract to determine numbers and species of birds <br />inhabiting the aspen stand which is scheduled for mining and to <br />compare with numbers and species of birds foun3 on reclaimed <br />sites. Bird and vegetation surveys were conducted on two <br />replicates in each of four habitat types, (1) aspen forest, (2) <br />aspen adjacent to reclaimed mine sites, (3) reclaimed mine sites, <br />(4) reclaimed mine sites adjacent to aspen forest in 1985. The <br />edge habitats were included to determine edge effect on bird <br />densities and diversity. In 1986 the edge habitats were <br />replaced by interior aspen and mountain shrub sites. Surveys were <br />conducted for two years on aspen and reclaimed sites and for one <br />year on the other four sites. This report includes the results <br />of surveys for 1985 and 1986. Data are presented by year for <br />each vegetative class, and means of 1985-86 bird densities on <br />aspen and reclaimed vegetation are presented. <br />VEGETATION <br />METHODS <br />Shrub cover was measured at each bird survey plot by line <br />intercept for 50 feet at each cardinal direction from the plot <br />center. Total percent shrub cover was calculated for each shrub <br />species using total inches intercept shrub A x 1 ft. x 1 x 100 <br />12 in. 200 <br />_ ~ shrub cover (shrub A). <br />Tree density (no. of trees/ac.) was determined by counting <br />all trees over 6 feet tall in a 6 foot belt on each side of the <br />east-west tape used for the line intercept. Tree density was <br />calculated for each survey plot using total stems x 43,560 sg. <br />1200 sq.ft. 1 acre <br />ft.= total stems/ac. <br />A modified point center quarter technique was used to <br />determine mine average dbh, height and age of trees (aspen, <br />serviceberry, chokecherry, oak, and maple) in the aspen habitats. <br />Three trees of each species nearest to each bird observation were <br />recorded (dbh was measured, height was estimated, and age was <br />categorized as sapling, mature, decadent, or dead). Canopy was <br />determined using a spherical densiometer (Lemmon 1956, 1957). <br />Within the reclamation habitats, the distance to the nearest <br />tree pad in each of four quadrants was measured if within 150 <br />feet of the bird observation point and estimated if beyond 150 <br />feet. The dimensions (length, width, and height) of each tree <br />pad was recorded and the dominant tree/shrub species specified. <br />The status of each tree pad (sprouting, dead, or decadent) was <br />noted. <br />A dominance rating defined.by Poulton was used to evaluate <br />the understory plant communities at each bird survey plot. <br />Dominance ratings of 1 to 5 were given to plants based on the <br />following factors: <br />5: Species which dominate the aspect of the layer. It is <br />dominant in the sense of its impact on the <br />