The relationships of diatom species to dissolved heavy metals in the streams of the Uintah Basin of Utah were studied through four seasons of 1977-1978 . Niche center gradient analysis, cluster analysis and correlation analysis were performed . Achnanthes minutissima, Cyclotella meneghiniana, Cymbella minuta, Gomphonema parvulum, Navicula secreta var . apiculata, Nitzschia frustulum, Nitzschia frustulum var . perminuta, Nitzschia frustulum var . perpusilla, Nitzschia palea, and Synedra ulna appear to be indicator species of high or low heavy metal concentrations . Several other species also showed meaningful relationships to high or low heavy metal concentrations .

The relat onsh ps of d atom spec es to selected phys cal and chem cal parameters n the streams of the U ntah Bas n of Utah were stud ed through four seasons of [1977][1978] . N che center grad ent analys s, cluster analys s and correlat on analys s were performed . Achnanthes m nut ss ma, Cyclotella menegh n ana, Cymbella m nuta var . latens, Frag lar a capuc na, and Nav cula secreta var . ap culata appear to be nd cator spec es of h gh or low levels of certa n water qual ty parameters . Several other spec es also showed mean ngful relat onsh ps to selected phys cal and chem cal parameters .