EFFECT OF TWO GRAZERS ON THE PERIPHYTIC ALGAL COMMUNITY IN ANDEAN STREAMS.
V. Diaz Villanueva and B. Modenutti. Laboratorio de Limnología, Centro Regional Universitario Bariloche, 8400 Bariloche, Río Negro, Argentina

EFFECTS OF LIGHT MANIPULATIONS ON MACROINVERTEBRATE COMMUNITIES IN OPEN AND CLOSED CANOPY STREAMS.
R.L. Fuller, L. Patterson, K. Peterson, and J. Gatial. Biology Department, Colgate University, Hamilton, New York 13346

EFFECTS OF A PARASITIC TREMATODE ON REPRODUCTION OF THE STREAM SNAIL ELIMIA FLAVA (LEA).
K.K. Lenertz, J.W. Feminella, and R.P. Henry. Department of Biological Sciences, Auburn University, Auburn, Alabama 36849-9234

BIOCHEMICAL RESPONSE OF ARCTIC BENTHOS TO UV RADIATION.
C.M. Mayer¹, S.A. Heckathorn¹, M.L. Bothwell², A. Ulseth³, and A.E. Hershey³. ¹Department of Biology, Syracuse University, 130 College Place, Syracuse, NY 13244, ²National Water Research Institute, Pacific Biological Station, 3190 Hammond Bay Road, Nanaimo, BC, Canada V9R 5K6, ³Department of Biology, University of North Carolina at Greensboro, 312 Eberhart Building, Greensboro, NC, 27402

RESOURCE AVAILABILITY AND PREDATION RISK AS FACTORS AFFECTING JUVENILE NOTONECTA DISTRIBUTION IN A FISHLESS POND.
Z. McLaren, S. Hampton, and J. Gilbert. Department of Biological Sciences, Dartmouth College, Hanover, NH 03755

PREDATORY FISH IMPACTS ON THE COMPETITION BETWEEN STREAM INSECT GRAZERS: CONSIDERING BEHAVIORALLY-MEDIATED EFFECT ON APPARENT COEXISTENCE PATTERN.
H. Miyasaka, M. Genkai-Kato, N. Kuhara, and S. Nakano. Tomakomai experimental forests, Hokkaido Univ, takaoka, Tomakomai, Hokkaido, 053-0035 Japan

DEATH FROM ABOVE: MANIPULATING PREDATION BY KINGFISHERS AND HERONS ON STREAM FISH AND INVERTEBRATES.
J.A. Steinmetz^1,2, S.L. Kohler³, and D.A. Soluk^1,2. ¹Department of Ecology, Ethology, and Evolution, University of Illinois, Urbana, 61801, ²Center for Aquatic Ecology, Illinois Natural History Survery, Champaign, IL 61820, ³Environmental Research Institute, Western Michigan University, Kalamazoo, MI 49008

FACILITATION BETWEEN PREDATORS: DO DRAGONFLIES BENEFIT BASS OR DO BASS BENEFIT DRAGONFLIES?.
H.D. Vance^1,2 and D.A. Soluk^1,2. ¹Department of Ecology, Ethology, and Evolution, University of Illinois, Urbana, Illinois, USA 61801, ²Center for Aquatic Ecology, Illinois Natural History Survey, Champaign, IL, USA 61820