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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />'"-:<,tg <br /> <br />Chapter 1 - Gathet Existing Information <br /> <br />8i. Title: Aquatic Insects as Measures of Trace Element Presence: Cadmium <br />and Molybdenum. <br /> <br />Prepared by: Theo. Colburn for Masters Thesis, Western State College, <br />Gunnison, CO. <br /> <br />Date: 1981 <br /> <br />Time of Study: 1979-1980 <br /> <br />Sites: <br />SR-1 <br />SR-2 <br />CB-1 <br />ER-1 <br />CC-1 <br />CC-2 <br />CC-3 <br />G-1 <br />OBJ-1 <br />GR-1 <br /> <br />Slate River below Coal Creek <br />Slate River below Peanut Lake <br />drinking water from tap; supply is from Coal Creek <br />E1'lst River below confluence with Cement Creek <br />Coal Creek above Splains Gulch <br />Coal Creek below Elk C;eek <br />Coal Creek above Keystone Mine Discharge <br />Town of Gothic drinking water source <br />Oh-Be-Joyful Creek <br />Gunnison River 2 mi north of the town of Gunnison <br />on hwy 135 bridge <br />See descriptions of sites on pp.85-102. <br /> <br />These sites do not correspond to other sites named as such in other <br />studies. <br /> <br />Parameters: Cadmium, Molybdenum <br /> <br />Purpose of Study: This study was designed to determine how water quality <br />affects n'lacroinvertebrates. Metal contamination of Coal Creek and Slate <br />River was examined via determining levels of Cd and Mo in the exoskeleton <br />of macrdinvertebrate species. The author found that insects concentrate <br />Cd at 2 to 4 orders of magnitude and that mechanisms of insect <br />concentr~tion of Mo are unknown. <br /> <br />Other aspects of study: An extensive discussion of metal sorption by <br />aquatic insects is included. <br /> <br />17 <br /> <br />J <br /> <br />,J, <br /> <br />. ;,~ <br />. <br />'. :'1 <br />..;ji,.,;I <br /> <br />,., <br /> <br />...' ,_.,CM <br />