RW-2 and RW-3, which had only 30% of their diatom floras in 

 common (Table 5.) 



LITERATURE CITED 



APHA. 1998. Standard Methods for the Examination of Water and 

 Wastewater. 20th Edition. American Public Health 

 Association, Washington, D.C. 



Bahls, L.L. 1973. Diatom community response to primary 



wastewater effluent. Journal Water Pollution Control 

 Federation 45 (1) : 134-144 . 



Bahls, L.L. 1979. Benthic diatom diversity as a measure of 

 water quality. Proc . Mont. Acad. Sci . 38:1-6. 



Bahls, L.L. 1980. Salinity and The Structure of Benthic Algae 

 (Periphyton) Communities in Streams of the Southern Fort 

 Union Region, Montana. Environmental Sciences Division, 

 Montana Department of Health and Environmental Sciences, 

 Helena. 



Bahls, L.L. 1993. Periphyton Bioassessment Methods for Montana 

 Streams (Revised) . Montana Department of Health and 

 Environmental Sciences, Helena. 



Bahls, L.L. 1999. Support of Aquatic Life Uses in the Redwater 

 River Based on Periphyton Composition and Community 

 Structure. Prepared For: State of Montana, Department of 

 Environmental Quality, Helena. 



Bahls, L.L., Bob Bukantis, and Steve Tralles. 1992. Benchmark 



Biology of Montana Reference Streams. Montana Department of 

 Health and Environmental Sciences, Helena. 



Bahls, L.L., E.E. Weber, and J. 0. Jarvie. 1984. Ecology and 

 Distribution of Major Diatom Ecotypes in the Southern Fort 

 Union Coal Region of Montana. U.S. Geological Survey 

 Professional Paper 1289, U.S. Government Printing Office, 

 Washington . 



Barbour, M.T., J. Gerritsen, B.D. Snyder, and J.B. Stribling. 



1999. Rapid Bioassessment Protocols for Use in Streams and 

 Wadeable Rivers: Periphyton, Benthic Macroinvertebrates and 

 Fish. Second Edition. EPA/841-B-99-002 . U.S. EPA, Office 

 of Water, Washington, D.C. 



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