1:00 LONGITUDINAL AND SEASONAL CHANGES IN BENTHIC MACROINVERTEBRATE COMMUNITY TROPHIC STRUCTURE ALONG THREE CENTRAL TEXAS STREAMS: SUBTROPICAL EXCEPTIONS TO THE RIVER CONTINUUM CONCEPT?.
B.R. Creutzburg and T.L.A. Arsuffi. Department of Biology--Aquatic Station, Southwest Texas State University, San Marcos, TX 78666

1:15 FROM CONTINUA TO PATCHES AND BACK: A LOOK AT THE MIDDLE FORK OF THE JOHN DAY RIVER.
K.K. Wright¹, J.L. Li¹, and H.W. Li². ¹Department of Fisheries & Wildlife, Oregon State University, Corvallis, Oregon, USA 97331, ²Oregon Coop. Fish Research Unit, Dept. Fisheries & Wildlife, Oregon State University, Corvallis, Oregon, USA 97331

1:30 INFLUENCE OF LANDSCAPE CHARACTERISTICS ON STREAM MACROINVERTEBRATES.
J.A. Schuldt¹, C. Richards², L.B. Johnson¹, and G. Host¹. ¹Natural Resources Research Institute, University of Minnesota, Duluth, Minnesota 55811, ²Minnesota Sea Grant College Program, University of Minnesota, Duluth, Minnesota 55812

1:45 PRONOUNCED GRADIENT IN ALGAL ACCUMULATION RATES AMONG RIFFLES OF THE SOUTH FORK EEL RIVER, CALIFORNIA, USA.
C. McNeely and M.E. Power. Dept. of Integrative Biology, Univ. of California, Berkeley, CA 94709

2:00 SPATIAL AND TEMPORAL VARIATION IN LOTIC CRAYFISH COMMUNITY STRUCTURE: RELATIONSHIP TO HABITAT SELECTION.
C.A. Flinders and D.D. Magoulick. Department of Biology, University of Central Arkansas, Conway, Arkansas 72035

2:15 REGIONAL INFLUENCES ON LOCAL COMMUNITY STRUCTURE: ARE STREAM BENTHIC COMMUNITIES SATURATED?.
D.S. Finn and N.L. Poff. Department of Biology, Colorado State University, Fort Collins, CO 80523

2:30 LONGITUDINAL AND SEASONAL DISTRIBUTION PATTERNS OF THE BENTHIC FAUNA OF AN ALPINE STREAM (VAL ROSEG, SWISS ALPS).
P. Burgherr and J.V. Ward. Department of Limnology, EAWAG/ETH, Ueberlandstrasse 133, CH-8600 Duebendorf, Switzerland

2:45 LOCAL AND REGIONAL STRUCTURING FACTORS OF BENTHIC MACROINVERTEBRATES IN TEMPERATE STREAMS: A PARTITION OF THE VARIANCE USING PARTIAL CANONICAL CORRESPONDENCE ANALYSIS (CCA).
L. Sandin and R.K. Johnson. Department of Environmental Assessment, SLU, Box 7050, S-750 07 Uppsala, Sweden