Biogeochemistry

Session 119 (Poster)
Tuesday, June 8, 1:30 PM-5:00 PM, SRC

(643) Nitrogen removal in a riverine network .
C.C. Allaway and F.R. Pick. Department of Biology, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5

(644) Nitrogen conversion along a moisture gradient in an Illinois River floodplain site.
J.L. Bartletti¹, M.J. Lemke¹, and D.G. Jenkins². ¹Biology Department, University of Illinois at Springfield, Springfield, Illinois, USA One University Plaza 62703-5407, ²Biology Department, University of Central Florida, Orlando, Florida, USA 4000 Central Florida Blvd. 32816-2368

(645) A simple model to explore the consequences of ecological stoichiometry in stream food webs.
W.B. Bowden¹, C. Cappalletti¹, A. Hackman¹, and M. McBride². ¹Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT 05405, ²Department of Civil and Environmental Engineering, University of Vermont, Burlington, VT 05405

(646) Nutrient limitation in stream algae in forested and deforested watersheds in Tanzanian streams.
A.E. Burce¹ and C.M. O’Reilly². ¹Harvey Mudd College, Claremont, CA, USA 91711, ²Environmental Science Program, Vassar College, Poughkeepsie, NY, USA, 12604

(647) Whole-stream denitrification: assessment of alternate methods and comparison of streams across a gradient of nitrogen loading.
W.K. Dodds¹, J.M. O’Brien¹, K.C. Wilson¹, S. Findlay², and S.K. Hamilton³. ¹Division of Biology, Kansas State University, Manhattan, Kansas 66506 U.S.A., ²Institute of Ecosystem Studies, P.O. Box AB, Millbrook, New York 12545 U.S.A., ³Kellogg Biological Station, Michigan State University, 3700 E Gull Lake Dr., Hickory Corners, Michigan 49060 U.S.A.

(648) Storm impacts on whole stream metabolism in Beaver Creek, a karstic drainage impacted by agricultural nitrate runoff in southeastern Minnesota.
J.H. Duff¹, A.P. Jackman², J. Tesoriero³, and F.J. Triska¹. ¹U.S. Geological Survey, 345 Middlefield Rd., MS 439, Menlo Park, CA 94025, ²University of California, Davis, CA 95616, ³U.S. Geological Survey, 3916 Sunset Ridge Road, Raleigh, NC 27607

(649) Spatial and temporal dynamics of dissolved inorganic nitrogen in a California floodplain.
E.L. Gallo¹, R.A. Dahlgren¹, and E.D. Grosholz². ¹Department of Land, Air and Water Resources, University of California, Davis, CA 96516, ²Department of Environmental Science and Policy, University of California, Davis, CA 95616

(650) Effects of antibiotic addition on nutrient limitation in streams.
N. Griffiths, L.C. Taylor, M.J. Bernot, and J.L. Tank. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556-0369

(651) Stable isotope measurements of dissolved nitrogen gas in the LINX project: Methodological challenges and solutions.
S.K. Hamilton. Kellogg Biological Station, Michigan State University, Hickory Corners, MI 49060

(652) Nutrient limitation of heterotrophic and autotrophic biofilms in three northern Michigan streams. .
T.J. Hoellein, J.L. Tank, and E.J. Rosi-Marshall. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA, 46556

(653) Inorganic nitrogen transport/transformation in hillslope groundwater and bankside hyporheic sediments in the Shingobee River, MN.
A.P. Jackman¹, F.J. Triska², J.H. Duff², and R.J. Avanzino². ¹University of California, Department of Chemical Engineering, Davis, CA 95616, ²U.S. Geological Survey, Water Resources, 345 Middlefield Rd. Menlo Park, CA 94025

(654) Inorganic and organic wastewater contaminants affects on river and shallow alluvial groundwater ecosystems in an arid region.
M.C. Martinet and C.N. Dahm. Biology Department, University of New Mexico, Albuquerque, New Mexico, USA

(655) The effects of recreational use on water chemistry in two small streams in north-central Arizona – a stable isotope perspective.
J.L. Moan, R.R. Doucett, and B.A. Hungate. Department of Biology, Northern Arizona University, Flagstaff, Arizona, 86001

(656) Nitrogen dynamics in human impacted stream ecosystems in the southwestern United States.
A.D. Pershall¹, C.L. Crenshaw¹, R.W. Sheibley², N.B. Grimm², and C.N. Dahm¹. ¹University of New Mexico, ²Arizona State University

(657) Assessing transient storage influences on nutrient spiraling: an updated approach.
H.M. Valett¹, S.A. Thomas², P.J. Mulholland³, J.R. Webster¹, C.N. Dahm⁴, and C.G. Peterson⁵. ¹Department of Biology, Virginia Tech, Blacksburg, VA 24060, ²Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, ³Environmental Science Division, Oak Ridge National Laboratories, Oak Ridge, TN 37831, ⁴Department of Biology, University of New Mexico, Albuquere, 87131, ⁵Department of Natural Sciences, Loyola, Univ. of Chicago, Loyola University, Chicago, IL 60626

(658) Nitrogen retention in mountain and spring Arctic streams.
H.S. Wilcox¹, D.M. Sanzone¹, B.J. Peterson¹, J.P. Benstead¹, L.A. Deegan¹, W.B. Bowden², S.M. Parker³, A.D. Huryn³, and A.C. Green¹. ¹1The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA 02543. U.S.A, ²School of Natural Resources, University of Vermont, Burlington, VT. 05405, U.S.A, ³Department of Biological Sciences, University of Alabama, Tuscaloosa, AL. 35487, U.S.A.