Biogeochemistry II

Session 8 (Contributed)
Thursday, May 30, 10:15 AM-12:00 PM, Allegheny III
Moderator: Mulholland, P.J.

10:15 (48) EFFECT OF STREAM-LAKE INTERACTION ON WATERSHED BIOGEOCHEMISTRY.
M.A. Baker¹, W. Wurtsbaugh², R.O. Hall, Jr.³, J. Haefner¹, M.M. Bozeman¹, and A.M. Marcarelli². ¹Department of Biology, Utah State University, Logan UT 84322 USA, ²Department of Fisheries and Wildlife, Utah State University, Logan UT 84322 USA, ³Department of Zoology and Physiology, University of Wyoming, Laramie WY 82071 USA

10:30 (49) THE EFFECT OF SPAWNING SALMON ON NUTRIENT DYNAMICS IN AN ALASKAN HEADWATER STREAM.
J.L. Tank, C.L. Crenshaw, and G.A. Lamberti. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556

10:45 (50) THE INCORPORATION OF MARINE-DERIVED NUTRIENTS IN SOUTHEAST ALASKAN STREAMS: SIMILARITIES AND VARIABILITY IN CARBON AND NITROGEN ISOTOPES.
B.S. Graham¹, P.O. Ostrom¹, D.T. Chaloner², R.W. Merritt³, G.A. Lamberti², and M.S. Wipfli⁴. ¹Department of Geological Sciences, Michigan State University, East Lansing, MI 48824, ²Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, ³Department of Entomology, Michigan State University, East Lansing, MI 48824, ⁴Pacific Northwest Research Station, USDA Forest Service, 1133 N. Western Ave., Wenatchee, WA 998801

11:00 (51) TRANSFER OF MARINE-DERIVED NITROGEN AND PHOSPHORUS FROM STREAM TO RIPARIAN FOREST VIA HYPORHEIC FLOWS.
R.T. Edwards¹ and T.C. O'Keefe². ¹Forestry Sciences Laboratory, USDA Forest Service, Juneau AK 99801, ²School of Aquatic and Fisheries Sciences, University of Washington, Seattle WA 98105

11:15 (52) NITROGEN TRANSPORT AND PROCESSING IN THE UPLANDS AND INTERMITTENT DRAINAGE NETWORK: HOW IMPORTANT ARE STREAMS?
J.R. Welter and S.G. Fisher. Department of Biology, Arizona State University, Tempe, AZ USA 85287-1501

11:30 (53) SPATIAL AND TEMPORAL VARIATION IN MASS-SPECIFIC UPTAKE RATES OF NITRATE-NITROGEN FOR VARIOUS STREAM ECOSYSTEM CONSTITUENTS.
S.A. Thomas¹, H.M. Valett¹, P.J. Mulholland², J.R. Webster¹, and C.N. Dahm³. ¹Department of Biology, Virginia Tech, Blacksburg, VA 24061, ²Division of Environmental Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, ³Department of Biology, University of New Mexico, Albuquerque, NM 87131

11:45 (54) CONTROLS ON NITRATE SPIRALING IN TWO SMALL FORESTED STREAMS DETERMINED BY ¹⁵N ADDITION EXPERIMENTS.
P.J. Mulholland¹, S.A. Thomas², C.A. Ancell³, J.J. Beaulieu¹, and A.N. Sullivan¹. ¹Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6036, ²Department of Biology, Virginia Tech, Blacksburg, VA 24061, ³Department of Biology, University of New Mexico, Albuquerque, NM 87131