EFFECTS OF GEOLOGY AND LAND USE ON PERIPHYTON ACCRUAL IN MIDWESTERN STREAMS.
D. Breneman¹, J.A. Schuldt¹, C. Richards², L.B. Johnson¹, and G. Host¹. ¹Natural Resources Research Institute, University of Minnesota, Duluth, MN 55811, ²Minnesota Sea Grant College Program, University of Minnesota, Duluth, MN 55812

DIATOMS AS AN INDICATER OF HUMAN DISTURBANCE IN OREGON'S CASCADE STREAMS.
P. Gill. Environmental Sciences and Resources, Portland State University, Portland, OR 97207. USA

PERIPHYTON RESPONSE TO NUTRIENT ADDITION IN RURAL VS. URBAN STREAMS.
S.E. Gresens and J.M. Lawrence. Department of Biological Sciences, Towson University, Towson, MD 21252 USA

DIATOM SPECIES RICHNESS IN STREAMS OF THE EASTERN U.S.: STREAM SIZE AND HABITAT EFFECTS.
B.H. Hill¹, S. DeCelles², and M. Vander Borgh^2,3. ¹U.S. Environmental Protection Agency, National Exposure Research Laboratory, Cincinnati, OH 45268, ²SoBran, Inc., c/o U.S. Environmental Protection Agency, National Exposure Research Laboratory, Cincinnati, OH 45268, ³N.C. Department of Environment and Natural Resources, Raleigh, NC 27609

ASSESSMENT OF EPIPHYTE COLONIZATION PATTERNS ON AQUATIC MOSS LEAVES USING SEM AND GIS.
G.D. LaLiberte. Department of Biological Sciences, Bowling Green State University, Bowling Green, Ohio, USA 43403

SPATIAL VARIABILITY OF LIGHT CO-LIMITATION WITHIN A NITROGEN LIMITED, EASTERN SIERRA, CALIFORNIA STREAM.
W.K. Taulbee, S.D. Cooper, and J.M. Melack. Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, California 93106

RECOVERY OF BENTHIC ALGAL ASSOCIATIONS DURING THE PH RECOVERY OF AN EXPERIMENTALLY ACIDIFIED LAKE.
M.A. Turner, L. Hendzel, D. Findlay, and S. Kasian. Experimental Lakes Area, Freshwater Institute, Department of Fisheries and Oceans, Winnipeg, Manitoba, Canada, R3V 1W5

ALPINE GLACIAL STREAMS: HABITAT TEMPLET AND SEASONAL PATTERNS IN PERIPHYTON.
U. Uehlinger, C.T. Robinson, and M. Hieber. Department of Limnology, EAWAG/ETH, 8600 Duebendorf, Switzerland

DISTRIBUTION OF ULTRAVIOLET LIGHT EFFECTS ON PERIPHYTON IN THE LITTORAL ZONE OF AN OLIGOTROPHIC BOREAL FOREST LAKE.
P. Weidman¹, M.A. Turner², L.G. Goldsborough¹, and H. Kling². ¹Department of Botany, University of Manitoba, Winnipeg, MB, Canada R3T 2N2, ²Freshwater Institute, 501 University Cres., Winnipeg, MB, Canada R3T 2N6