Biogeochemistry

Session 169 (Poster)
Thursday, May 29, 3:30 PM-5:30 PM, Grand Hall

(486) How the addition of salmon carcasses vs. salmon analog affects nutrient export in an Alaskan stream.
L.C. Taylor, J.L. Tank, and G.A. Lamberti. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556

(487) Longitudinal effects of Pacific salmon carcasses on surface water chemistry, epilithon abundance, and nutrient export in southeastern Alaska streams.
A.D. Cak, G.A. Lamberti, N.L. Mitchell, and D.T. Chaloner. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556-0369

(488) Predicting reaeration rates from stream characteristics: a simple model for streams in the southeastern coastal plain.
J.N. Houser and P.J. Mulholland. Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

(489) Trace gas concentrations in Georgia Piedmont headwater streams.
R.A. Burke¹ and J. Molinero². ¹USEPA/NERL, 960 College Station Rd., Athens, GA 30605, ²National Research Council, USEPA/NERL, 960 College Station Rd., Athens, GA 30605

(490) Ammonium uptake kinetics in a suburban Kansas stream.
J.M. O'Brien, K.C. Wilson, and W.K. Dodds. Division of Biology, Kansas State University, 232 Ackert Hall, Manhattan, KS 66506

(491) Phosphorus sources at the Illinois River Basin, Northwest Arkansas, USA: effect of alum and calcium carbonate on sediment-phosphorus interactions.
B.E. Haggard¹, S.A. Ekka², M.D. Matlock², I. Chaubey², and P.A. Moore Jr.¹. ¹USDA-ARS Poultry Production and Product Safety Research Unit, Fayetteville, Arkansas, USA 72701, ²Biological and Agricultural Engineering Department, University of Arkansas, Fayetteville, Arkansas, USA 72701

(492) Land use effects on nitrification in Michigan headwater streams.
E.R. Hotchkiss¹, M.J. Kemp², J.L. Tank², S.E. Eichler², L.G. Wall², and C.P. Arango². ¹Emory University, Department of Environmental Studies, Atlanta, GA 30322, ²University of Notre Dame, Department of Biological Sciences, Notre Dame, IN 46556

(493) Benthic denitrification rates on heterogeneous substrata in streams draining forested and agricultural landscapes.
C.P. Arango¹, J.L. Tank¹, M.J. Kemp¹, L.G. Wall¹, S.E. Eichler¹, and E.R. Hotchkiss². ¹Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, ²Emory University, Atlanta, GA, 30322

(494) How does the ratio of N₂O to N₂ vary in stream and reservoir sediments?
J.J. Beaulieu, J.L. Tank, S.E. Eichler, L.G. Wall, and M.J. Kemp. Department of Biology, University of Notre Dame, Notre Dame, Indiana 46556

(495) Sediment denitrification associated with zebra mussel beds.
D.A. Bruesewitz^1,2, J.L. Tank¹, M.J. Kemp¹, and W.B. Richardson². ¹Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, ²Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, WI 54603

(496) Effects of grazing by armored catfish, Ancistrus triradiatus , on N-fixation in an N-limited tropical stream.
G.M. Gettel and A.S. Flecker. Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853

(497) Nitrogen uptake and transformation in arctic spring and mountain streams.
D.M. Sanzone¹, B.J. Peterson¹, K.H. Barnes², J.P. Benstead¹, L.A. Deegan¹, C.P. Crockett¹, W.B. Bowden³, S.M. Parker⁴, A.D. Huryn⁴, and A.C. Green¹. ¹The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA 02543 USA, ²StreamTechs, LLC, 2634 Woodley Place NW #3, Washington, DC 20008, USA , ³School of Natural Resources, University of Vermont, Burlington, VT 05405 USA, ⁴Department of Biological Sciences, University of Maine, Orono, ME 04469 USA

(498) Carbon isotopic signatures of biofilm microbes in two contrasting Ozark streams.
S.E. Ziegler and S.L. Brisco. Department of Biology, University of Arkansas, Fayetteville, Arkansas, U.S.A. 72701

(499) Dissolved organic carbon in small streams of the Georgia Piedmont.
J. Molinero¹ and R. Burke². ¹National Research Council, USEPA, Athens, Georgia 30605, ²National Exposure Research Lab, USEPA, Athens, Georgia 30605

(500) Landscape controls over dissolved organic carbon and UV penetration in northern Michigan streams.
J.H. Larson¹, P.C. Frost¹, G.A. Lamberti¹, D.M. Lodge¹, S.D. Bridgham¹, C.A. Johnston², P.A. Maurice³, and B.A. Shmagin⁴. ¹Dept. of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46553, ²Dept. of Civil Engineering and Geological Sciences, University of Notre Dame, IN, 46553, ³Natural Resources Research Institute, University of Minnesota-Duluth, Duluth, MN 55811, ⁴Department of Geology, University of Minnesota, Duluth, MN, 55812

(501) Automated analysis of DIC and DOC in water samples for stable isotopes – a new technique.
R.R. Doucett and B.A. Hungate. Department of Biology, Northern Arizona University, Box 5640, Flagstaff, Arizona, 86011

(502) Comparison of whole–stream metabolism predictions on a small urban stream.
K.C. Wilson, W.K. Dodds, and J.M. O'Brien. Division of Biology, Kansas State University, Manhattan, Kansas, USA 66506