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<br />Table 6. (CONT'D). COVER, FREQUENCY AND IMPORTANCE VALUE SUMMARY FOR THE GRASSLAND REFERENCE <br /> AREA AT THE WALDEN COAL PROJECT SITE. BASED ON 1997 (AUGUST L9) DATA FROM <br />FIFTEEN 25-METER POINT TRANSECTS. +/- VALUES EQUAL THE STANDARD DEVIATION. <br /> <br /> Mean Relative Range of Percent Relative Importance <br />Species Cover Cover Cover Values Frequency Frequency Value Rank <br /> <br />LICHENS <br />Parmeliachlorochroa 10.87 3- 23 100.00 <br />Litter 32.53 15- 48 100.00 <br />Rock 1.40 0- 6 53.33 <br />TOTAL VEGETATION 28.40 +/- 3.78 <br />LITTER/ROCK 44.80 +/- 5.75 <br />~ BARE SOIL 24.67 +/- 9.20 <br />TOTAL COVER 75.33 +/- 9.20 <br />Number of Species/transect 9.33 <br />