ible 6. Density of bare soil and soil crust and the number of 



A r a b i s f ecunda plants growing in each type of substrate 

 in three belt transects. 



10 



# point 

 hits 



# point 

 hits 



n of 



A . fecund; 



of 

 fecund; 



crust on bare soil in soil crust in bare so' 

 289 81 48 



6 1 <0 . 000 



Charleys Gulch 83 



44 <0 . 000 1 



Charleys Gulch 



30 <0 . 0001 



