Hyporheic Processes

Session 37 (Contributed)
Wednesday, June 7, 10:15 AM-12:00 PM, Egan 5
Moderator: S.M. Wondzell

10:15 (237) Effects of varying surface discharge on biotic gradients in the hyporheic zone of a New Zealand gravel-bed river.
T. Datry^1,2, S.T. Larned², M.R. Scarsbrook³, and G. Fenwick². ¹Aquatic Ecosystem Biology, Cemagref, 3bis quai Cheauveau, F-69336 Lyon Cedex 09, France, ²NIWA Ltd., PO Box 8602, Christchurch, New Zealand, ³NIWA Ltd., PO Box 11-115, Hamilton, New Zealand

10:30 (238) Nutrient dynamics in alluvial flowpaths and the Minibar experiment.
S.T. Larned¹ and T. Datry². ¹National Institute of Water & Atmospheric Research, Christchurch, New Zealand, ²CEMAGREF, Groupment de Lyon, Lyon, France

10:45 (239) Potential anaerobic subsidy of aerobic food webs in the hyporheic zone of a large floodplain river.
B.L. Reid, F.R. Hauer, and J.A. Stanford. Flathead Lake Biological Station, Division of Biological Sciences, The University of Montana, 311 Bio Station Lane, Polson, MT, USA 59860.

11:00 (240) Microbial activities in rural streams: effect of catchment land-use and local sediment characteristics.
P. Marmonier¹, S. Lefebvre¹, C. Damgaard², and G. Pinay³. ¹UMR-CNRS Ecobio, University of Rennes 1, 35042 Rennes, France, ²Department of Terrestrial Ecology, NERI, 8600 Silkeborg, Denmark, ³CNRS-Centre Ecologie Fonctionnelle & Evolutive, 34293 Montpellier, France

11:15 (241) Transient storage behavior across stream-reaches with varying discharge, groundwater influx, and bed form.
C.D. Arp¹, M.N. Gooseff², and M.A. Baker¹. ¹Department of Biology, Utah State Univeristy, Logan, Utah 84322, ²Department of Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401

11:30 (242) Software for compartmental analysis of nitrate retention in streams.
B.R. Faulkner¹ and M.E. Campana². ¹Hydrologist, U.S. Environmental Protection Agency, Office of Research and Development, Ada, OK, 74820, ²Director, Institute for Water and Watersheds, Oregon State University, Corvallis, OR 97331-2208

11:45 (243) Implications of biophysicochemical process coupling and hyporheic structure for modeling nitrogen dynamics in rivers.
A.I. Packman¹, J.D. Newbold², S. Arnon¹, and K.A. Gray¹. ¹Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60201, USA, ²Stroud Water Research Center, Avondale, PA, 19311, USA