Biogeochemistry III

Session 33 (Contributed)
Friday, May 30, 1:00 PM-2:45 PM, Athena GH
Moderator: Stelzer

1:00 (224) Stream nutrient cycling in an agricultural landscape.
M.J. Kemp¹, J.L. Tank¹, T.V. Royer², and M.B. David². ¹Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, ²Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, IL 61801

1:15 (225) Estimation of ambient nutrient uptake from nutrient enrichment experiments.
J.R. Webster¹, R.A. Payn¹, E.N.J. Brookshire¹, S.R. Earl¹, O.S. Starry¹, H.M. Valett¹, and P.J. Mulholland². ¹Department of Biology, Virginia Tech, Blacksburg, VA 24061, ²Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831

1:30 (226) Effects of salmon carcasses vs. salmon analog on nutrient spiralling in two tributaries of an Alaskan headwater stream.
J.L. Tank, L.C. Taylor, G.A. Lamberti, and D.T. Chaloner. Department of Biology, University of Notre Dame, Notre Dame, IN 46556, USA

1:45 (227) The effect of spawning salmon on dissolved organic carbon in southeastern Alaska streams.
C.L. Crenshaw¹, D.T. Chaloner², C.N. Dahm¹, G.A. Lamerti², and J.L. Tank². ¹Department of Biology, Univeristy of New Mexico, Albuquerque, NM, 8713, USA, ²Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA

2:00 (228) Benthic sediment influence on spatial heterogeneity of soluble reactive phosphorus concentrations in Boulder Creek.
N.R. Lottig and E.H. Stanley. Center for Limnology, University of Wisconsin, Madison, WI 53706

2:15 (229) Separation of algae and detritus for stable isotopic measurements using density fractionation in colloidal silica.
S.K. Hamilton¹, S.J. Sippel¹, and S.E. Bunn². ¹Kellogg Biological Station, Michigan State University, Hickory Corners, MI 49060, ²Australian School of Environmental Studies, Griffith University, Brisbane, QLD Australia

2:30 (230) The effects of sampling frequency on estimates of solute export from streams: the role of concentration-discharge relationships and hydrological variability.
R.S. Stelzer, J.H. McCutchan, and G.E. Likens. Institute of Ecosystem Studies, Millbrook, NY, USA 12545