• 



Table 5. Relative abundance of cells and rank by biovolume of 

 diatoms and genera of non-diatom algae in periphyton 

 samples collected from Billman Creek near Livingston, 

 Montana on July 21, 2000. 



Taxa 



Relative Abundance and (Rank) 

 Station 1 Station 2 



Chlorophyta (green algae) 

 Cladophora 

 Closterium 

 Mougeotia 

 Oedogonium 

 Spirogyra 



rare (3) 



occasional (5) 



common (4) 

 abundant (2) 

 dominant (1) 



Euglenophyta (euglenoid algae) 

 Phacus 



rare (7) 



Chrysophyta (golden algae) 



Bacillariophyceae (diatoms] 

 Vaucheria 



frequent (1) 

 frequent (2) 



abundant ( 3 ) 



Cyanophyta (cyanobacterici) ^ 

 Oscillatoria 



occasional (4) 



occasional (6) 



^ Formerly known as blue-green algae 



