The 



be retainedSby Hannaea in Helena 



Station information, sample information, and diatom 

 proportional count data have been entered into the Montana Diatom 

 Database, maintained on a PC by Hannaea in Microsoft Access. 



RESULTS AND DISCUSSION 



Results are presented in Tables 4 and 5, which are located 

 near the end of this report following the References section. 

 Spreadsheets containing completed diatom proportional counts, 

 with species' pollution tolerance classes (PTC) and percent 

 abundances, are attached as Appendix A. 



SAMPLE NOTES 



BS-1. The Cladophora in this sample was senescent. 

 Oscillatoria v/as present both as an epiphyte and as free-living 

 trichomes . 



BS-2. Sample is silty,- contains Elodea and other plant 

 material . 



M22BSPRC01. Some moss is present. 



M22BSPRC02. Visible mats of Phormidium are present. 



M22BSPRC05. Sample is silty. 



NGN- DIATOM ALGAE 



Diatoms dominated periphyton samples collected from the 



8 



