Food Webs I

Session 23 (Contributed)
Friday, May 31, 8:00 AM-9:45 AM, Allegheny III
Moderator: Tuchman, N.C.

8:00 (153) A SEARCH FOR TROPHIC RELATIONSHIPS ALONG A LONGITUDINAL STREAM GRADIENT.
K.K. Wright¹ and J.L. Li². ¹Biology Department, University of Wisconsin-Platteville, Platteville, Wisconsin, USA 53818, ²Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon, USA 97331

8:15 (154) ELEVATED ATMOSPHERIC CO₂ ALTERS LEAF LITTER NUTRITIONAL QUALITY: IMPACTS ON THREE TROPHIC LEVELS IN DETRITUS BASED AQUATIC FOOD WEBS.
N.C. Tuchman^1,2, B. Swedo^1,2, S. Abichandani¹, S.T. Rier^1,2, and R.G. Wetzel³. ¹Department of Biology, Loyola University Chicago, Chicago, IL, USA 60626, ²University of Michigan Biological Station, Pellston, MI, USA 49769, ³Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, NC, USA 27599

8:30 (155) IMPACTS OF A DETRITIVOROUS FISH ON ORGANIC MATTER DYNAMICS IN A NEOTROPICAL STREAM.
B.W. Taylor¹ and A.S. Flecker². ¹Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, ²Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853

8:45 (156) INVASIVE SNAILS DOMINATE CARBON AND AMMONIUM CYCLING IN A GEOTHERMAL STREAM.
R.O. Hall, Jr.¹, J.L. Tank², and M.F. Dybdahl³. ¹Dept. of Zoology and Physiology, University of Wyoming, Laramie WY 82071, ²Dept. of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, ³School of Biological Sciences, Washington State University, Pullman, WA, 99164

9:00 (157) RELATIVE IMPORTANCE OF ALLOCHTHONOUS AND AUTOCHTHONOUS CARBON TO LITTORAL ZONE FOOD WEBS IN FIVE PERCHED DUNE LAKES ON FRASER ISLAND, AUSTRALIA.
W.L. Hadwen¹, S.E. Bunn¹, A.H. Arthington¹, and T.D. Mosisch². ¹Centre for Catchment and In-Stream Research and Cooperative Research Centre for Sustainable Tourism, Griffith University, Nathan, QLD 4111, Australia, ²South Australian Water Corporation GPO Box 1751, Adelaide, SA 5001, Australia

9:15 (158) QUANTIFYING CHANGES IN THE RIO GRANDE FOOD WEB OVER TIME USING STABLE ISOTOPE ANALYSES OF MUSEUM SPECIMENS.
M. Edwards and T. Turner. Department of Biology, University of New Mexico, Albuquerque, New Mexico 87131

9:30 (159) ECOLOGY OF PARAFLUVIAL PONDS ON A ROCKY MOUNTAIN FLOOD PLAIN.
S.D. Chilcote^1,2 and J.A. Stanford¹. ¹Flathead Lake Biological Station, The University of Montana, Polson, MT 59860-9659, USA, ²Division of Biological Sciences, The University of Montana, Missoula, MT 59812-4824, USA