Table 4. Relative abundance of cells and ordinal rank by biovolume of diatoms (Division Bacillariophyta) 

 and genera of non-diatom algae in periphyton samples collected from the Big Hole River TMDL 

 Planning Area in 2003: d = dominant, a = abundant, f = frequent, c = common; o = occasional; 



r = rare, (continued) 



Taxa WRMSC02 BGHNF01 BGHNF02 GOLDC01 GOLDC02 JERRC01 PINECoT 



Cyanophyta 



Amphithrix 



Anabaena a/1 0/8 o/9 



Calothrix c/5 0/8 



Chamaesiphon 



Merismopedia 



Nodularia 



Nostoc f/3 



Oscillatoria f/3 o/9 d/1 o/7 



Phormidium 



Symploca 



Tolypothrix c/4 0/6 



Rhodophyta 

 Audouinella o/7 0/6 0/8 



Chlorophyta 



Ankistrodesmus 0/1 1 



Cladophora 



Closterium r/9 o/7 c/5 c/5 c/3 c/4 c/4 



Cosmarium 0/8 0/6 o/7 o/4 



Drapamaldia a/1 



Hormidium 



Microspore 



Mougeotia 



Oedogonium 



Pedlastrum 



Prasiola d/1 



• 



Scenedesmus 



Spirogyra 0/6 a/2 c/4 0/6 f/3 



Staurastrum 



Stigeoclonium f/3 



Tetraspora c/5 



Ulothrix d/2 



Zygnema c/6 



Euglenophyta 



Euglena 



Chrysophyta 



Hydrurus foetidus 



Tribonema 



Vaucheria 



Bacillariophyta f/2 



No. Non-Diatom Genera 8 



