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<br />0 TABLE OF CONTENTS <br /> Page <br /> ACKNOWLEDGMENTS ii <br /> <br /> LIST OF TABLES . . . . <br />vi <br /> LIST OF FIGURES x <br /> ABSTRACT . xii <br /> INTRODUCTION , <br />1 <br /> STUDY AREA AND SITE SELECTION 9 <br /> Study Area . 9 <br />• <br /> Yampa River . 9 <br /> Green River 11 <br /> Site Selection 13 <br /> Location of Yampa River stations 14 <br /> Location of Green River stations 15 <br /> Sampling Schedule . 15 <br /> MATERIALS AND METHODS 16 <br /> <br /> Primary Production and Respiration . 16 <br /> Sampling device . 16 <br /> Sampling procedure . 19 <br /> Chlorophyll a . 20 <br /> Suspended Organic Matter 22 <br /> Chemical Oxygen Demand . 22 <br /> Aquatic Macroinvertebrates 23 <br /> Insolation and Temperature 25 <br /> Factors Related to Rates of Gross Primary Production . 25 <br /> Data Analysis . 26 <br /> PHYSICAL ENVIRONMENT . 29 <br /> Discharge 29 <br /> Temperature 34 <br /> Insolation . 37 <br />0