Biogeochemistry 2

Session 49 (Contributed)
Wednesday, June 7, 3:45 PM-5:30 PM, Egan 5
Moderator: R.O. Hall

3:45 (319) Examining organism stoichiometry and relative nutrient demand in streams with differing water column N:P.
S.A. Thomas¹, A.S. Flecker², P.B. McIntyre², and J.D. Schade³. ¹School of Natural Resources, University of Nebraska, Lincoln, NE 68583, ²Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, ³Biology, St Olaf College, Northfield, MN 55057

4:00 (320) Diel fluctuations of DOC and DON uptake in streams.
L.T. Johnson and J.L. Tank. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556

4:15 (321) Influence of Wood on Nitrate Uptake in Streams of Western Oregon, U.S.A.
D.J. Sobota¹, S.V. Gregory¹, S.L. Johnson², and L.R. Ashkenas¹. ¹Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon 97331, ²USDA Forest Service, Pacific NW Research Station, 3200 SW Jefferson Way, Corvallis, Oregon 97331

4:30 (322) What is the functional relationship between nitrate cycling and concentration in prairie streams?
J.M. O'Brien¹, W.K. Dodds¹, K.C. Wilson², J.N. Murdock¹, and J. Eichmiller¹. ¹Division of Biology, Kansas State University, Manhattan, Kansas, USA 66506, ²School of Life Sciences, Arizona State University, Tempe, Arizona, USA 85287-4501

4:45 (323) Patterns of temporal variation in N and P uptake in two streams located at different altitude.
E. Marti¹, D. Von Schiller¹, A. Argerich², F. Sabater², J.L. Riera², and M. Ribot¹. ¹Centre d'Estudis Avançats de Blanes (CSIC); Accés a la Cala ST. Francesc, 14; 17300 Blanes; Spain, ²Departament d'Ecologia; Universitat de Barcelona; Diagonal, 645; 08028 Barcelona; Spain

5:00 (324) Nutrient spiraling through stream networks: a quantitative synthesis of 25 years of stream biogeochemical research.
S.H. Ensign and M.W. Doyle. Curriculum in Ecology, University of North Carolina at Chapel Hill, Chapel Hill, NC

5:15 (325) Surface-subsurface hydrologic exchange and nitrogen dynamics in the hyporheic zone of the Tanana River in Interior Alaska.
H.M. Clilverd¹, J.B. Jones¹, K. Kielland¹, and L.D. Hinzman². ¹Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, Alaska 99775, ²Water and Environmental Research Center, Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, Alaska 99775