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 Rosebud Creek Station 1. This sample consisted of two 

 small rocks, which I brushed with a toothbrush into the sample 

 container. Algae in this sample were very sparse. 



East Rosebud Creek Station 2. This sample contained 

 macrophytes. The diatom assemblage at this site included 

 Didymosphenia geminata, a large, stalked, gomphonemoid diatom 

 with striking ornamentation. 



NON- DIATOM ALGAE 



Both sites on East Rosebud Creek supported green algae, 

 diatoms, and cyanobacteria (Table 4) . Green algae accounted for 

 most of the biomass at both sites, while diatoms ranked second 

 and cyanobacteria ranked third. Euglena, an indicator of organic 

 pollution, was rare at Station 2. 



Algae, including diatoms, were very sparse at Station 1, 

 probably reflecting the cold, nutrient-poor water at this site. 



