RESULTS AND DISCUSSION 



Results are presented in Tables 5 through 8, located near 

 the end of this report following the Literature Cited section. 

 In each table, stations and their associated data are listed in 

 order from upstream to downstream (left to right) . Streamflow 

 and conductivity in the Teton River (MDEQ field data) are charted 

 in Figures 1 and 2, which follow the tables. Completed diatom 

 proportional count forms are attached as Appendix A. 



NON- DIATOM (SOFT) ALGAE 



McDonald Creek 



McDonald Creek had an exceptionally diverse flora of green 

 algae and cyanobacteria (Table 5) . Some of the taxa recorded for 

 McDonald Creek (e.g., Oocystis, Selenastrum, and Chroococcus) are 

 planktonic and reflect the lacustrine origin of this stream. 



McDonald Creek had an assortment of green algae, diatoms, 

 and cyanobacteria, which is the typical mix of algae in least- 

 impaired Montana streams (Bahls et al . 1992) . No significant 

 differences in the soft algal flora were evident between the 

 upper and lower sites on McDonald Creek. Worthy of note were 

 BulJbochaete, a pollution- sensitive green alga, and Tolypothrix, a 

 pollution- sensitive cyanobacterium, which were abundant and very 

 common at the upper and lower sites, respectively (Table 5) . 



Upper Teton River 



Only diatoms were found in the sample collected from the 

 North Fork of the Teton River (Table 5) . Field personnel were 

 unclear about sampling methodology at this station (C. Endicott, 

 MDEQ, pers . comm.) . Insufficient sampling effort may explain the 

 lack of soft algae and the sparse number of diatoms collected at 



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