Sample Notes 



Jackson Creek. Teratological cells of the diatom Synedra ulna were observed during 

 the scan of soft algae. 



Jennies Fork. The sample from this site was silty. 



Granite Creek. The sample from this site contained moss. An ear-shaped colony of 

 Nostoc parmelioides was present in this sample. The morphology of colonies ofNostoc 

 parmelioides, a filamentous cyanobacterium common in mountain streams, is altered from 

 spherical to ear-shaped by the presence of an endosymbiotic midge larva. Ear-shaped colonies 

 exhibit greater photosynthesis and nitrogen-fixation rates in response to higher current velocities, 

 while spherical colonies do not respond in this manner (Wehr and Sheath 2003). 



Non-Diatom Algae (Table 3) 



Diatoms and cyanobacteria, including Oscillatoria sp., were present at all three sites. 

 The chrysophyte Hydrunis foetidus was present only in Jennies Fork and red and green algae 

 (Rhodophyta and Chlorophyta) were present only in Granite Creek (Table 3). 



Jackson Creek. The filamentous blue-green alga Oscillatoria was abundant and ranked 

 first in biovolume in the sample from Jackson Creek (Table 3). Oscillatoria includes almost 70 

 species and typically grows in mats on different substrata (mud, plants, stones, sand) in shallow 

 water. Taking all species into account. Palmer (1969) ranks Oscillatoria second, next only to 

 Euglena, in terms of tolerance to organic loading. Diatoms were frequent and ranked 2"'' in 

 biovolume here, followed by Nostoc, which was common and ranked 3"^*^. This site supported 

 only 2 genera of non-diatom algae, both of them blue-greens. 



Jennies Fork. Hydnirus foetidus was abundant and ranked first in biovolume in Jennies 

 Fork (Table 3). NichoUs and Wujek (2003) reviewed the biology of this common alga: 



