used to make duplicate diatom slides. After completing the 

 diatom proportional count, the slide used for the count will be 

 deposited in the University of Montana Herbarium in Missoula. 

 The other slide will be retained by Hasinaea in Helena. 



On completion of the project, station information, sample 

 information, and diatom proportional count data will be entered 

 into the Montana Diatom Database. 



RESULTS AND DISCUSSION 



Results are presented in Tables 5 and 6, which are located 

 near the end of this report following the Literature Cited 

 section. Spreadsheets containing completed diatom proportional 

 counts, with species' pollution tolerance classes (PTC) and 

 percent abundances, are attached as Appendix A. 



SAMPLE NOTES 



S-3. This sample consisted mostly of acjuatic mosses 



NON- DIATOM ALGAE 



Diatoms were the most abundant algae at both sites on Spring 

 Creek (Table 5) . Green algae ranked second in abundance and 

 cyanobacteria were a distant third. Audouinella, a red alga, was 

 rare at S-3, but absent at S-2. Dominance by diatoms and green 

 algae and low numbers of cyanobacteria usually indicate an ample 

 supply of biologically-available nutrients, including nitrogen. 



Spring Creek supported a rich non-diatom flora consisting of 

 17 genera: 14 genera were observed at S-2 and 8 genera were 



