CONTENTS 



Page 



Introduction 1 



Materials and methods 1 



Organisnns collected and identified 1 



Effects of treatment in different streams 5 



Changes in treated and control streanns 5 



Changes in riffle and sand-detritus areas 6 



Summary of effects 1 week after treatnnent 11 



Sunnmary of effects 6 weeks and 1 year after treatment 1 1 



Acknowledgments 13 



Literature cited 13 



