Relative Abundance (%) of Diatom Taxa (Continued) 



Taxa 



Yellowstone R. Bighorn R. Yellowstone R 

 @ Custer @ Bighorn @ Myers 



Fragilaria construens 0.7 



Fragilaria construens v. venter 



Fragilaria crotonensis 



Fragilaria vaucheriae 1.0 



Fragilaria vaucheriae v. novum 



Fragilaria sp. t(l) 



Gomphoneis herculeana 0.3 



Gomphoneis sp. t(l) 



Gomphonema bohemicum 



Gomphonema olivaceum 8.9 



Gomphonema olivaceum v. calcarea 



Gomphonema parvulum 0.7 



Gomphonema parvulum v. micropus 



Gyrosigma obtusatum 



Gyrosigma sp. t(l) 



Hannaea arcus 0.7 



Mastogloia sp. 



Meridion circulare 



Navicula anglica v. subsalsa 



Navicula arvensis 



Navicula cryptocephala 2.3 



Navicula cryptocephala v. veneta k.6 



Navicula grimmei 



Navicula heufleri v. leptocephala 



Navicula luzonensis 



t = trace 



2.9 



t 



0.5 

 12.7 



1.1 



t(l) 



0.3(1) 



t 



t 

 1.9 

 3.7 



t 



t 



t 

 0.9 

 0.3 



0.6 

 11.6 



t 



0.3 

 t 



0.3 



t 

 t 



1.2 



6.1 



0.3 

 0.6 



-10- 



