APPENDIX D 



'% 



s ^ 



DEZP^JlTTIEaifVilQt^- ■ /.^.-. 



V. ,' 



RsH Anna CJiame 



Box 1063 



P^h 91 1 Qo/c Glendive, Mont, 



reb. 21,1976 59330 



Dear Liter, 



I recently discovered a paper that will help you deciede 

 thP 5? "^^croinvertebrate population changes you found in 

 the Blackfoot River afterthe washout are significant 



Cairns(l967) states that "For biologically oriented 



abSfS 7. T" °P!^^^i°"^l definition of optiL? il the 

 ability to support an aquatic community in a pattern whioh 



fst?.??^'^^''^-"^"^" ^^^" 2° P^^<^^"^ ^^^^ the empirlcalS 

 paJt?cular\™l^.^'^^'^-^^^^^ ''^'^^'^^ ^^-"^^ ^' -eh 



^^^"""i; +>; '^^^- ^^^ "'" °^ ^^^^^ '^"^lity control techniques 

 Bull !3???!f3':^^"' ^'^ ^^"^^^" ecosystems. Water Res!^ 



also see : 



Cairns J. and R.L.Kaesler. 1969. Cluster analysis of 

 Potomac River survey stations based on Protozoan 

 presence anbencs data. Hydrobiologia 34'iSJ-43l 



'L\\l''o\S:?."|,'di^e^s'itv''cL\\''^'i?^.^ °" ^^ ^° 2^^ °^ 

 but deviations over I^^Li?^''^^^^'^ normal and healthy 



examine yoi?^?e°;i^hoTt S:ers1iranTfSd^^?he^SIgL°s? '^'^ 

 value and compare it with the post-washout diversi?J 



I hope this is of some help. 



Sincerely, 

 Robert L. Newell 



A-52 



