100 



(a) Smilacina stellata 



(b) Thalictrum occldentale 



50 



100 400 800 1200 1600 100 400 800 1200 1600 



NUMBER OF PASSES NUMBER OF PASSES 



Figure 14. — The relationship between number of passes and relative cover (percent- 

 age of original cover that survives, adjusted for changes on control lanes) for the 

 most common vascular species and for mosses and lichens as a group. The * 

 denotes species for which data from more than one habitat type have been aver- 

 aged. 



22 



