Food Webs

Session 25 (Contributed)
Friday, May 30, 8:00 AM-9:45 AM, Athena IJ
Moderator: McIntosh

8:00 (166) Experimental investigation of top-down effects on the food web of a fish-less temporary freshwater pond.
A.K. Magnusson and D.D. Williams. Division of Life Science, University of Toronto at Scarborough, Scarborough, Ontario, Canada M1C 1A4

8:15 (167) Effects of low-level nutrient additions on a littoral zone food web in an oligotrophic perched dune lake, as determined using a ¹⁵N tracer .
W.L. Hadwen, S.E. Bunn, and A.H. Arthington. Centre for Catchment and In-Stream Research, CRC for Sustainable Tourism, Griffith University, Nathan QLD 4111, Australia

8:30 (168) Incorporation of pulp mill effluent solids in aquatic food webs: use of carbon and nitrogen stable isotopes.
D.J. Velinsky, C.A. Flinders, N.E. Saxe, and R.L. Thomas. Patrick Center for Environmental Research, The Academy of Natural Sciences, Philadelphia, PA 19103

8:45 (169) The effect of forest type on benthic macroinvertebrates and trophic dynamics in the southeastern United States.
K.J. Goodman, A.E. Hershey, and K. Fortino. Department of Biology, University of North Carolina Greensboro, Greensboro, NC

9:00 (170) Invertebrate productivity of small streams in western Washington.
C.J. Volk¹, P.M. Kiffney², and R.L. Edmonds¹. ¹College of Forest Resources, University of Washington, Seattle, Washington, USA 98195, ²National Marine Fisheries Service, Northwest Fisheries Science Center, Mukilteo Biological Field Station, Mukilteo, Washington, USA 98275

9:15 (171) Spatial variability of stable isotopes in stream macroinvertebrates: patterns along a river continuum.
M.I. Hornberger, A.R. Stewart, and S.N. Luoma. U.S. Geological Survey, 345 Middlefield Rd., MS 465, Menlo Park, CA 94025

9:30 (172) Impacts of predatory fish in grassland and forested streams: does forest cover influence the relative importance of top-down processes?
A.R. McIntosh¹, P. Nyström^1,2, and M.J. Winterbourn¹. ¹Department of Zoology, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, ²Department of Ecology, Lund University, Sweden