3:15 INFLUENCE OF BEAVER (CASTOR CANADENSIS) ON NITROGEN CYCLING IN A DESERT STREAM.
B.J. Harper and J.B. Jones. Department of Biological Sciences, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454004, Las Vegas, NV89154-4004

3:30 DETERMINING THE TRANSPORT AND RETENTION OF NITRATE IN RIPARIAN GROUNDWATER OF THE SHINGOBEE RIVER MN, USA USING NUTRIENT-TRACER INJECTIONS.
F.J. Triska¹, A.P. Jackman², and J.H. Duff¹. ¹US Geological Survey, 345 Middlefield Road MS 439, Menlo Park, CA 94025, ²Department of Chemical Engineering, University of California at Davis, Davis, CA 95616

3:45 ABIOTIC CONTROLS ON NUTRIENT SPIRALING AND METABOLISM IN 8 WESTERN WYOMING STREAMS.
J.L. Tank¹ and R.O. Hall². ¹Department of Natural Resources and Environmental Sciences, N-411 Turner Hall, 1102 S. Goodwin Ave, University of Illinois, Urbana, IL 61801., ²Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071.

4:00 LINKING WHOLE-STREAM METABOLISM WITH NUTRIENT SPIRALING IN 8 WESTERN WYOMING STREAMS.
R.O. Hall¹ and J.L. Tank². ¹Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, ²Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, IL 61801

4:15 RELATIONSHIP BETWEEN STREAM PHOSPHORUS RETENTION AND THE LEVEL OF PHOSPHORUS ADDITION.
B.E. Haggard, R.D. Tejral, and D.E. Storm. Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, Oklahoma, USA 74078

4:30 EFFECTS OF EXPERIMENTAL CHANNEL MANIPULATION ON SOLUTE AND PARTICLE TRANSPORT IN 3 SMALL APPALACHIAN STREAMS.
M.J. Paul. Institute of Ecology, University of Georgia, Athens, GA 30602-2202

4:45 DETERMINING LIMITING NUTRIENTS IN LAKE EUCHA TRIBUTARIES.
V. Keyworth¹, D.E. Storm¹, R. Lynch², D. Altom², B.E. Haggard¹, and M. Matlock³. ¹Oklahoma State University, ²Oklahoma University, ³Texas A&M University