Biogeochemistry 5

Session 67 (Contributed)
Thursday, June 8, 1:30 PM-3:15 PM, Egan 5
Moderator: S.A. Thomas

1:30 (445) Geomorphic, hydrological and biological controls of nutrient removal in river networks.
W.M. Wollheim¹, C Vorosmarty¹, B.J. Peterson², and C Hopkinson². ¹Complex Systems Research Center, University of New Hampshire, ²Ecosystems Center, Marine Biological Laboratory

1:45 (446) Influences of variability in the hydrologic cycle on stream and groundwater chemistry in a large semi-arid basin.
T.K. Harms and N.B. Grimm. School of Life Sciences, Arizona State University, Tempe, AZ 85287

2:00 (447) Nitrate and phosphorus export from agricultural watersheds in the midwestern U.S.: implications for programs to reduce nutrient loading to the Mississippi River.
T.V. Royer¹, M.B. David², and L.E. Gentry². ¹School of Public and Environmental Affairs, Indiana University, Bloomington, IN 47405, ²Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, IL 61801

2:15 (448) Relationships between sediment-bound phosphorus and primary productivity in streams: Natural variability and impacts from treated wastewater.
K.L. Kizer², K.M. Slattery¹, S.J. Van Der Hoven², and W.L. Perry¹. ¹Department of Biology, Illinois State University, Normal, Illinois, ²Department of Geology, Illinois State University, Normal, Illinois

2:30 (449) Macroinvertebrate stoichiometry and biological transient storage below a point source input.
J.D. Ortiz^1,2, E. Marti², G.C. Merseburger^2,3, M.A. Puig², and F. Sabater³. ¹Center for the Study of Mediterranean Rivers, Foundation of the Industrial Museum of the Ter River, 08560 Manlleu, Barcelona, Spain, ²Center of Advanced Studies of Blanes, CSIC, 17300 Blanes, Girona, Spain, ³Department of Ecology, University of Barcelona, 08028 Barcelona, Spain

2:45 (450) Excretion of limiting nutrients by grazing and detritivorous caddisflies.
C. McNeely¹, J.D. Schade², and J.C. Finlay³. ¹St. Anthony Falls Laboratory, University of Minnesota, Twin Cities, Minneapolis, MN 55414, ²Biology and Environmental Studies, St. Olaf College, Northfield, MN 55057, ³Department of Ecology, Evolution, and Behavior, University of Minnesota, Twin Cities, St. Paul, MN 55108

3:00 (451) SUBSISTENCE FISHING BY HUMANS AS A MAJOR NITROGEN FLUX IN TROPICAL ANDEAN STREAM ECOSYSTEMS .
A.S. Flecker¹, J.E. Allgeier¹, R.O. Hall, Jr.², P.B. McIntyre¹, B.W. Taylor^2,3, C.T. Solomon⁴, and A.J. Ulseth¹. ¹Department of Ecology & Evolutionary Biology, Cornell University, Ithaca, NY, USA 14853, ²Department of Zoology & Physiology, University of Wyoming, Laramie, WY, USA 82071 , ³Center for Limnology, University of Wisconsin, Madison, WI, USA 53706, ⁴Department of Biological Sciences, Dartmouth College, Hanover, NH, USA 03755