RESULTS AND DISCUSSION 



Results are presented in Tables 4 and 5, 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 calculated 

 percent abundances, are attached as Appendix A. 



SAMPLE NOTES 



Reach 022. This sample was very silty. Macrophytes were 

 present. The Cladophora here was senescent and covered with 

 epiphytes, which included Oedogonium, Phormidium, Rivularia, and 

 Stigeoclonium . Free-living Oedogonium was also present. Only 

 straight filaments of Anabaena were observed. 



Reach 012. This sample was very silty. Macrophytes were 

 present . Ostracods and amphipods were very abundant . Both 

 coiled and straight filaments of Anabaena were observed. 



Reach Oil. Sample was very silty. Terrestrial vegetation 

 was present in the sample. The Phorwidiuin was epiphytic on 

 filamentous algae. 



•Reach 008. Sample was silty, but not as silty as sample 

 from Reach 006. Macrophytes were absent, but some terrestrial 

 vegetation was included in the sample. At least four species of 

 Spirogyra were present . 



Reach 006. Sample was very silty and macrophytes were 

 present. Both straight and coiled filaments of Anabaena were 

 observed. Most diatoms were very small. 



Reach 004. Chara appears here and in Reach 003. Sample not 

 very silty. Only straight filaments of Anabaena were observed. 



Reach 003.3. Sample not very silty,- includes macrophytes. 

 Straight and coiled filaments of Anabaena were observed. 



Reach 003.2. Macrophytes present. Sample not very silty. 

 Both straight and coiled filaments of Anabaena were present. 



Reach 003.1. Sample contains little silt. The Calothrix 

 species formed large gelatinous masses. More than one species of 

 Anajbaena was present. 



Reach 001. Sample was silty and crammed with macrophytes. 

 Multiple species of Oedogonium, Mougeotia, and Cosmarium were 

 present, as well as straight and coiled species of Anajbaena. 



8 



