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 Hannaea 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 4 and 5, 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 



East Boulder River Station 1. Very little sediment was 

 present in this sample. 



East Boulder River Station 2. Very little sediment was 

 present in this sample. 



East Boulder River Station 3 (1998) . This sample was very 

 sparse; only 225 diatom cells were counted in 10 transects across 

 the coverslip. The sample contained very little sediment. 



East Boulder River Station 3 (1999) . This sample was 

 dominated by a single colony of Schizothrix, which appeared as a 

 dark green rubbery mat with a bumpy surface. Otherwise, this 

 sample was sparse and the entire sample (except the Schizothrix 

 colony) was processed to make diatom slides. Two species of 

 Phonnidiuin were present, one with wide filaments and the other 



