

i°0.3Qjta 



Hannaea 9 



1032 Twelfth Avenue • Helena. MT 59601 • (406) 443-2196 

 e-mail: lbahls@selway.umt.edu 



February 16, 199 9 



Ms. Carol Endicott 



Monitoring and Data Management Bureau 



Department of Environmental Quality 



P.O. Box^ 2^9 0.1 



Helena/ fiff§£69ehiQ-0901 



Re : McDonaJNjS^reek -and Teton River Periphyton Report 



Dear Carol,, 



Enclosed is. a co P!^( W report on periphyton samples collected 

 last summer 'from Mluw^ald Creek and the Teton River. 



The Teton River at DeriSStjBridge was, the only site that did, not 

 fully support aquatic '^^aV uses based on periphyton composition 

 and community s'tructureSjJ^Ahe " partial support recorded at .'this 

 site was probabl*y due toAasc^ssive segmentation and homogeneity, 

 of algal microhab'sj.tats .- 'T^yWriad of ^bther insults to'the Tetoii' 

 (dewatering, salinity , nutrv^tfe. ..)- did\aot have a huge effect •'.■';■ 

 on periphyton composition anNd^aoVnunity structure . 



V V \ ' \ ' 



Bob Bukantis called tN?day to as^ irVI would%ive a seminar, on 



interpreting periphyton data . Xs^ested -using this report as ■ 

 the basis for discussion, so he ttK^SjjD^ to copy this report for 

 those who will attend the\ seminar 7N7%kV ■ :-'\i ■' .'■-. 



..■ 



■■:-•-- - % ■■ ' ' 

 Please let me know if you ha^/e any queVtafens ..or. .if you -want the 



results presented differently^ The fepT^^i's ',. l: iri;';my computer so 

 can easily correct errors or make 



X 



Thanks for the work. My invoice is encloseXs&^y ..the way, your 

 agency purchase order lists my telephone numfll&Sas- my federal ID- 

 number. If you need my Social Security Numb er^g^.'.s ^4.7 4 -.4 1 - 94 4 3 . 



Sincerely, %^ 



(\jXZ/y\ &zJ)/s 



Loren L . Bahls , Ph . D . 

 Phycologist 



Enclosures (Teton River Report and Invoice)' |fe 



Frustulia bahlaii Bdlund and Brant' 



