Relative Abundance (%) of Diatom Taxa (Concluded) 



Taxa 



Yellowstone R. Bighorn R. Yellowstone R 

 @ Custer @ Bighorn @ Myers 



Rhoicosphenia curvata 



Surirella ovata 



Synedra acus 



Synedra ulna v. contracta 



3.3 

 1.6 

 1.0 

 0.3 



6.1 

 1.6 

 0.3 



0.6 

 0.9 

 0.3 

 0.3 



-12- 



