New Directions in Food Web Analysis 2

Session 19 (Special)
Tuesday, June 8, 10:15 AM-12:00 PM, IRC2
Moderator: P. Eldridge

10:15 (126) Seasonal feeding relationships between an introduced (Orconectes neglectus) and native crayfish (Orconectes eupunctus) in Ozark streams: a stable isotope analysis .
D.D. Magoulick¹, G.L. Piercey², and S.E. Ziegler². ¹U.S.G.S., Arkansas Cooperative Fish and Wildlife Research Unit, Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, ²Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701

10:30 (127) Understanding the impact of trophic cascades across diverse ecosystems.
J.B. Shurin¹, E.T. Borer², E.W. Seabloom², K. Anderson³, C.A. Blanchette³, B. Broitman³, S.D. Cooper³, and B.S. Halpern². ¹Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, ²NCEAS, University of California, Santa Barbara, CA 93101, ³Dept. of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, 93106

10:45 (128) Spatial variability in stream habitats and food web architecture.
R.M. Thompson¹ and C.R. Townsend². ¹Biodiversity Research Centre, University of British Columbia, Vancouver, Canada, ²Department of Zoology, University of Otago, Dunedin, New Zealand

11:00 (129) Examination of riparian food-web dyanmics using ecological stoichiometry and natural abundances of stable isotopes .
T.M. Tibbets, M.C. Molles, and J.F. Schuetz. Department of Biology, University of New Mexico, Albuquerque, NM USA 87131

11:15 (130) Elevated atmospheric CO₂ alters leaf litter nutritional quality: Effects on 3 trophic levels in streams.
N.C. Tuchman^1,2, S.T. Rier^2,3, and R.G. Wetzel⁴. ¹Department of Biology, Loyola University Chicago, Chicago, IL, USA 60626, ²University of Michigan Biological Station, Pellston, Michigan, USA 49769, ³Department of Biology, University of St. Thomas, St. Paul, Minnesota, USA 55105, ⁴Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, USA 27599

11:30 (131) Prey and detritus subsidies in riverine ecosystems: a watershed perspective of marine, terrestrial, and headwater inputs for fish-bearing food webs in coastal Alaska.
M.S. Wipfli. USGS Cooperative Research Unit, Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, 99709