3:15 EFFECTS OF OMNIVOROUS FISHES AND THE SUPPRESSION OF TROPHIC CASCADES IN BOTH ALGAL- AND DETRITAL-BASED FOODWEBS.
C.M. Pringle, A.D. Rosemond, and A. Ramírez. Institute of Ecology, University of Georgia, Athens, GA 30602

3:30 DOES TOP-DOWN CONTROL OF INSECTS BY FISHES VARY ALONG A NATURAL PHOSPHORUS GRADIENT?.
A. Ramírez and C.M. Pringle. Institute of Ecology, University of Georgia, Athens, GA 30602

3:45 EFFECT OF GRAZER IDENTITY ON TROPHIC CASCADES AND INDIRECT EFFECTS ON STREAM ASSEMBLAGES.
F.P. Gelwick. Department of Wildlife & Fisheries Sciences, Texas A&M University, College Station, Texas 77843-2258

4:00 EFFECTS OF LARGE-BODIED OMNIVOROUS FISHES ON BENTHIC COMMUNITIES IN RESERVOIRS.
K. Gido. University of Oklahoma, Department of Zoology and Biological Station

4:15 EFFECTS OF FISH ON THE TROPHIC STRUCTURE OF MICHIGAN STREAMS: EVIDENCE FROM A NUTRIENT GRADIENT STUDY.
C.M. Riseng¹, M.J. Wiley¹, R.J. Stevenson², P.W. Seelbach³, and J.R. Holomuzki⁴. ¹School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI, USA 48104, ²Zoology Department, Michigan State University, East Lansing, MI, USA, ³Institute of Fisheries Research, Michigan Department of Natural Resources, Ann Arbor, MI, USA 48104, ⁴Biology Department, Ohio State University of Mansfield, Mansfield, OH, USA 94906

4:30 HYPORHEIC NUTRIENT DYNAMICS IN SW ALASKAN SOCKEYE STREAMS: DO THE FISH REALLY MATTER?.
R.T. Edwards^1,2 and T. O’Keefe². ¹Center for Streamside Studies, University of Washington, Seattle, WA 98195, ²School of Fisheries, University of Washington, Seattle, WA 98195

4:45 FISH-BENTHIC INTERACTIONS IN ARCTIC LAKES: TOP DOWN CONTROL OF FOOD WEBS IS CONSTRAINED BY LANDSCAPE CRITERIA.
A.E. Hershey¹, G. Gettel², P.W. Lienesch¹, M.E. McDonald³, C.M. Mayer⁴, H. Mooers⁵, W. O’Brien⁶, C. Richards⁵, J.A. Schuldt⁵, and A.I. Wilson¹. ¹Biology Department, University of North Carolina-Greensboro, Greensboro, NC 27402, ²Section in Ecology and Systematics, Cornell University, Ithaca, NY 14853, ³US Environomental Protection Agency National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC 27711, ⁴Biology Department, Syracuse University, Syracuse, NY 13244, ⁵University of Minnesota-Duluth, Duluth, MN 55812, ⁶Department of Systematics and Ecology, University of Kansas, Lawrence, KS 66045

5:00 FROM THE TOP TO THE BOTTOM: FUNCTIONS OF FISH IN FRESHWATER FOOD WEBS.
G.A. Lamberti. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556-0369 USA