Sample Notes 



Careless Creek above Deadman's Basin Return. This sample was very silty and 

 contained 2 or 3 species of Spirogyra, which dominated the sample. The Oscillatoria in this 

 sample had very wide trichomes. 



Careless Creek below Deadman's Basin Return. This sample contained abundant fine 

 particulate organic matter and was very silty. Cladophora, which was dominant in this sample, 

 was senescent and covered with organic matter and diatoms. 



Careless Creek near mouth. This sample was extremely silty. Cladophora was also 

 dominant in this sample and was covered with diatom epiphytes, mainly Rhoicosphenia 

 abbreviata. 



Non-Diatom Algae (Table 4) 



All three sites were dominated by filamentous green algae. Spirogyra (a.k.a. "pond 

 scum") ranked first in biovolume at the upstream site above the Deadman's Basin return. 

 Spirogyra is unattached and grows best in quiet or slowly moving waters. Cladophora, which is 

 attached and prefers cooler water in motion, dominated at the lower two sites. Both genera are 

 capable of becoming a nuisance under the right conditions. Other genera of filamentous green 

 algae were also present above and below the Deadman's Basin return. 



Cyanobacteria (blue-green algae) were found in samples collected above the return and 

 near the mouth, but not below the return. Diatoms were abundant and ranked second in 

 biovolume at all three sites. The number of non-diatom genera declined from a high of 6 above- 

 the return to a low of 4 near the mouth. 



