Table 4. Relative abundance of cells and rank by biovolume of 

 diatoms and genera of non-diatom algae in periphyton 

 samples collected from Big Dry Creek and Little Dry 

 Creek near Jordan, Montana. 



Taxa 



Relative Abundance and (Rank) 



Big Dry Creek 

 (8/23/00) 



Chlorophyta (green algae) 

 Anki s trodesmus 

 Bulbochaete 

 Cosrnari um 

 Oedogonium 

 Rhizoclonium 

 Spirogyra 



occasional (8) 



occasional (3) 



occasional (4) 



common ( 2 ) 



Little Dry Creek 

 (5/27/99) 



frequent (3) 

 abundant (2) 

 frequent (4) 



Euglenophyta (euglenoid algae) 



Euglena occasional (9) 



rare (6) 



Chrysophyta (golden algae) 

 Bacillariophyceae 



frequent (1) 



abundant ( 1 ; 



Cyanophyta (cyanobacteria) ^ 

 Anajbaena 

 Calothrix 

 Phormidium 



occasional {6[ 

 occasional (7; 

 occasional (5] 



common ( 5 ) 



^ Formerly known as blue-green algae. 



