8:00 HABITAT-SPECIFIC VARIATION IN TROPHIC INTERACTIONS IN A NEOTROPICAL STREAM.
B.A. Daley and A.S. Flecker. Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853

8:15 PHYSICAL DISCONTINUITY HYPOTHESIS: THE ROLE OF GEOMORPHIC BARRIERS ON FOODWEB STRUCTURE AND FUNCTION IN TROPICAL WATERSHEDS, PUERTO RICO.
T.A. Crowl¹, A.P. Covich², and F.S. Scatena³. ¹Ecology Center, Utah State University, Logan, Utah, 84322, ²Department of Fishery and Wildlife Biology, Colorado State University, Ft Collins, CO, 80523, ³Institute of Tropical Forestry, U.S. Forest Service, Rio Piedras, PR, 00928

8:30 FEAST OR FAMINE? EFFECTS OF PULSED RIPARIAN LITTER INPUTS ON TROPICAL STREAM FOOD WEBS.
A.P. Covich¹, J.K. Henry¹, T.A. Crowl², S.L. Johnson³, J. Rincon⁴, and F.N. Scatena⁵. ¹Department of Fishery and Wildlife Biology, Colorado State University, Ft. Collins, Colorado, 80523 USA, ²The Ecology Center, Utah State University, Logan, Utah, 84322 USA, ³Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon 97331 USA, ⁴Departmento de Biologia, Universidad de Zulia, Maracaibo, 400 5-A Venezula, ⁵International Institute of Tropical Forestry, Rio Piedras, PR 00928 USA

8:45 MAYFLY PREDATION BY JUVENILE FRESHWATER CRABS: IMPLICATIONS FOR CRAB HABITAT SELECTION.
J.K. Henry¹, A.P. Covich¹, T.S. Bowden¹, and T.A. Crowl². ¹Department of Fishery and Wildlife Biology, Colorado State University, Ft. Collins, CO 80523, ²Department of Fisheries and Wildlife, Utah State University, Logan, UT 84322

9:00 RIPARIAN DETRITUS IN A HAWAIIAN STREAM ECOSYSTEM: A COMPARISON OF DROUGHT AND POST-DROUGHT DYNAMICS.
S.T. Larned¹. ¹Hawaii Institute of Marine Biology, Kaneohe, Hawaii, 96744, ²Coastal Ecology Branch, United States Environmental Protection Agency, Newport, Oregon 97365

9:15 MACROINVERTEBRATE ASSEMBLAGES AND DETRITUS PROCESSING IN KENYAN HIGHLAND STREAMS - MORE EVIDENCE FOR THE PAUCITY OF SHREDDERS IN THE TROPICS.
M.K. Dobson¹, A. Magana², J. Mathooko², and F. Ndegwa². ¹Department of Environmental & Geographical Sciences, Manchester Metropolitan University, Chester St., Manchester, M1 5GD, UK, ²Department of Zoology, Egerton University, PO Box 536, Njoro, Kenya

9:30 TRANSPORT AND RETENTION OF PLANT COARSE POM IN A TROPICAL 2ND ORDER STREAM, THE NJORO RIVER, KENYA.
M.P. Leichtfried¹, G.O. Morara², and J.M. Mathooko². ¹Dept. Biological Station Lunz, Inst. of Limnology, Austrian Academy of Sciences, Seehof 4, A-3293 Lunz/See, Austria, ²University Egerton, Zoology Dept., POB 536, Njoro, Kenya

9:45 EVIDENCE AND IMPLICATIONS OF LOW OXYGEN AVAILABILITY IN HIGHLAND STREAMS.
D. Jacobsen¹, S. Rostgaard¹, and J. Vásconez². ¹Freshwater Biological Laboratory, University of Copenhagen, Helsingørsgade 51, DK-3400 Hillerød, Denmark, ²Departamento de Ciencias Biológicas, Universidad Católica del Ecuador, Apartado 17-01-2184, Quito, Ecuador