Table 4 Percent abundance of major diatom species^ and values of selected diatom association metrics 

 for periphyton samples collected from Jackson Creek, Jennies Fork, and Granite Creek in 2002. 

 Underlined values indicate minor stress, bold values indicate moderate stress, underlined and 

 bold values indicate severe stress; all other values indicate no stress and full support of aquatic 

 life uses when compared to chtena for mountain streams in Table 2. Stress may be natural or 

 anthropogenic (see text) 



^A major diatom species accounts for 5.0% or more of the cells at one or more stations in a sample set. 

 ^(Organic) Pollution Tolerance Class (Lange-Bertalot 1979): 1 = most tolerant; 2 = tolerant; 3 = sensitive. 



