Biogeochemistry I

Session 3 (Contributed)
Thursday, May 30, 8:00 AM-9:45 AM, Allegheny III
Moderator: Stanley, E.H.

8:00 (15) CHANGES IN STREAMWATER DOC, DON AND DIN DURING LEAF LEACHATE RELEASES.
E.S. Bernhardt¹ and W.H. McDowell². ¹Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC 27708-0328, ²Department of Natural Resources, University of New Hampshire, Durham, NH 03824-3589

8:15 (16) DYNAMICS OF DISSOLVED OXYGEN, CARBON DIOXIDE, AND ECOSYSTEM METABOLISM IN A GROUNDWATER DOMINATED STREAM.
E.H. Stanley¹, J.C. Finlay², and P.C. Hanson¹. ¹Center for Limnology, University of Wisconsin, Madison, Wisconsin USA 53706, ²U.S. Geological Survey, 3215 Marine St., Boulder, Colorado USA 80303

8:30 (17) ENERGY FLOW IN A STREAM ECOSYSTEM: AN ASSESSMENT OF DENITRIFICATION AND OXYGEN METABOLISM.
T.V. Royer¹, J.L. Tank², and M.B. David¹. ¹University of Illinois, Urbana, IL 61801, ²University of Notre Dame, Notre Dame, IN 46556

8:45 (18) INFLUENCE OF A NEWLY CONSTRUCTED BEAVER DAM ON NUTRIENT AND POC TRANSPORT/RETENTION IN A SAND BED STREAM, THE SHINGOBEE RIVER, MN, USA.
F.J. Triska¹, A.P. Jackman², J.H. Duff¹, and R.J. Avanzino¹. ¹U.S. Geological Survey, Menlo Park, CA 94025, ²University of California at Davis, Davis, CA 95616

9:00 (19) NUTRIENT DYNAMICS IN SUBSURFACE FLOWPATHS OF AN ARID WATERSHED.
J.D. Schade¹, D.B. Lewis¹, A.K. Huth², J. Villinski², M. Conklin², N.B. Grimm¹, and J. Hamblen². ¹Biology Department, Arizona State University, Tempe, AZ, USA 85287-1501, ²Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ 85721

9:15 (20) GEOMORPHIC SCALING OF UPTAKE LENGTH IN CHANNEL NETWORKS AND THE POTENTIAL IMPORTANCE OF HEADWATER STREAMS.
J.D. Newbold¹, L.A. Kaplan¹, and P.R. Claggett². ¹Stroud Water Research Center, 970 Spencer Road, Avondale, PA 19311, ²Cannan Valley Institute, 100 Princeton Road, Exton, PA 19341

9:30 (21) ECOLOGICAL STOICHIOMETRY OF PERIPHYTON AND GRAZERS IN OLIGOTROPHIC ROCKY MOUNTAIN RIVERS OF CANADA.
M.F. Bowman¹, P.A. Chambers², and D.W. Schindler¹. ¹Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9, ²National Hydrology Research Institute, Environment Canada, Saskatoon, Saskatchewan, Canada, S7N 3H5