Little Dry Creek at Highway 200. Sample was very silty. 

 The bulk of the sample was a root wad. Branching was observed in 

 the Rhizoclonium, but it was rare. About 20% of the diatom 

 frustules were empty. Two species of Oedogonium were observed. 



Redwater River at Gackle. This sample was relatively free 

 of silt. Two species of Anabaena were observed: one with 

 straight filaments and the other with tangled filaments. Chara 

 was the visual dominant in this sample. 



Redwater River at Kurtz. Stigeoclonium consisted of short, 

 tapering but unbranched filaments growing on Rhizoclonium. 



Redwater River at Union Bridge. Sample was in process of 

 decomposition; general aspect was black; smelled of hydrogen 

 sulfide. Bulk of sample consisted of a root wad and amorphous 

 black organic material. Soft algae were in poor condition, but 

 identifiable. 



Redwater River below Circle STP . Sample was very silty. 

 Much of the sample consisted of aquatic macrophytes. 



Redwater River below Bluff Creek. Sample was very silty. 

 The bulk of the sample consisted of a root wad and macrophytes 

 [Myriophyllum) . Algae did not visually dominate this sample. 



Redwater River above Pasture Creek. Bulk of sample was a 

 root wad and a small piece of Myriophyllum. Rhizoclonium was 

 entangled in the root wad and much of it was covered with diatom 

 epiphytes. Less than 10% of the diatom frustules were empty. 

 Sample was not very silty compared to others in this series. 



Redwater River at Highway 201. The bulk of this sample 

 consisted of a root wad, bits of grasses and twigs, and a piece . 

 of Myriophyllum . Algae were significantly less common than at 

 the next upstream site (3A) . Sample not very silty compared to 

 others in this series. Although abundant, Rhizoclonium was not 

 conspicuous in the root wad. 



Redwater River at Nickwall Crossing. Bulk of sample 

 consisted of a few stems and a small root wad, among which were 

 entangled Rhizoclonium, Vaucheria and tube-dwelling diatoms 

 {Nitzschia filiformis?) . Sample somewhat silty. Rhizoclonium 

 more branched than specimens from other sites. 



East Redwater River near mouth. Bulk of sample consisted of 

 a few stems covered with ciliated protozoans on branched stalks. 

 Algae were relatively sparse. Sample not very silty. . Sample was 

 collected about 0.25 miles above confluence with the Redwater 

 River. The correct name, according to the USGS hydrologic map, 

 is East Redwater River, not East Fork Redwater River (sample 

 label) or East Redwater Creek (Montana DOT county map book) . 



8 



