1:00 COLMATION CONSEQUENCES: EFFECTS OF SEDIMENTATION ON PARTICULATE ORGANIC MATTER PROCESSING IN THE HYPORHEIC ZONE.
J.M. Quinn¹, L.A. Golding¹, and A.J. Boulton². ¹National Institute of Water and Atmospheric Research, PO Box 11-115, Hamilton, New Zealand, ²Division of Ecosystem Management, University of New England, Armidale, 2350 New South Wales, Australia

1:15 THE EFFECTS OF AUGMENTATION OF ORGANIC MATTER ON METABOLISM IN HYPORHEIC SEDIMENTS.
C.L. Crenshaw and H.M. Valett. Department of Biology, Virginia Polytechnic Institute and St. University, Blacksburg, VA. 24061

1:30 MICROBIAL RESPONSE TO INPUTS OF DISSOLVED ORGANIC MATTER IN SUBSURFACE WATERS OF A FLOODPLAIN TERRACE IN A COASTAL PACIFIC NORTHWEST RIVER.
S. Clinton¹, R.T. Edwards¹, and S. Findlay². ¹Center for Streamside Studies, Box 352100, College of Forest Resources, University of Washington, Seattle WA, USA 98195, ²Institute of Ecosystem Studies, Box AB, Millbrook, NY, USA 12545

1:45 SURFACE-SUBSURFACE HYDROLOGY OF AN ARID LAND STREAM: EFFECTS ON NUTRIENT DYNAMICS.
C.L. Dent¹, J.W. Edmonds², N.B. Grimm², J.C. Henry², E. Marti³, and J.R. Welter². ¹Center for Limnology, University of Wisconsin, Madison, Wisconsin, USA 53706, ²Department of Biology, Arizona State University, Tempe, Arizona, USA 85287, ³Centre d'Estudis Avancats de Blanes, Blanes 17300 (Girona), Spain

2:00 INFLUENCE OF WATER TABLE ELEVATION AND REDOX ON SUBSURFACE INPUTS FROM RIPARIAN MEADOWS TO LOW-ORDER STREAMS.
K.A. Dwire, J.B. Kauffman, and J. Brookshire. Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon 97333.

2:15 INFLUENCE OF PERMAFROST ON GROUNDWATER NUTRIENT INPUTS IN SUB-ARCTIC STREAMS.
J.B. Jones¹, K.C. Petrone², and L.D. Hinzman². ¹Department of Biological Sciences, University of Nevada - Las Vegas, Las Vegas, NV 89154, ²Water and Environmental Research Center, University of Alaska, Fairbanks, AK 99775

2:30 NITRATE RETENTION IN FOUR HEADWATER STREAMS.
C.S. Fellows¹, C.N. Dahm¹, and H.M. Valett². ¹Department of Biology, University of New Mexico, Albuquerque, New Mexico 87131, USA, ²Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA

2:45 HYDROLOGIC VARIABILITY, ORGANIC MATTER SUPPLY, AND DENITRIFICATION IN THE GARONNE RIVER ECOSYSTEM.
M. Baker¹, P. Vervier², and L. Roques². ¹Department of Biology, Utah State University, Logan, UT, USA 84322, ²CESAC, CNRS/UPS, 29 rue Jeanne Marvig, Toulouse, France 31055