Poster # 176. O'Hara, Jill^*,1, Ryser, Peter¹, ¹ Laurentian University, Sudbury, Ontario, Canada, Competitive ability of a species along a successional gradient: growth, turnover rates and plant size.

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Poster # 177. Brown, Rebecca^{*,1, 2}, ¹ Patrick Center for Environmental Research, Philadelphia, PA² Eastern Washington University, Cheney, WA, How does a dam's size influence its impact on riparian vegetation?

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Poster # 178. Christensen, Jay¹, ¹ Iowa State University, Ames, IA, The distribution and abundance of Hyalella azteca across an emergent vegetation to open water gradient in a prairie pothole wetland.

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Poster # 179. Cromartie, William^*,1, Akers, Julie¹, Cummings, Denis¹, Cook, Justine¹, Leckenbush, Jordan¹, Millar, Graeme¹, ¹ Environmental Studies Program, Pomona, NJ, USA, Stream ecology of an urbanizing watershed in the New Jersey Pine Barrens.

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Poster # 180. Gil Mora, Eduardo^{*,1, 2}, Cruz Miranda, Luciano^{3, 4}, Yanque, Percy, ¹ aquatic ecology, Cusco, Cusco² Invertebrate ecology, Cusco, Cusco^{3 4} , Andean freshwater stream bioindicators.

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Poster # 181. Wissel, Bjoern ^*,1, Fry, Brian¹, ¹ Coastal Ecology Institute, Baton Rouge, LA, USA, Stable isotope analyses of particulate organic matter as indicator for estuarine hydrology and productivity.

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Poster # 182. Pope, Karen^{1, 2}, Lawler, Sharon^*,1, Welsh, Hartwell², ¹ Ecology Graduate Group and Department of Entomology, Davis, CA, U.S.A.² U.S. Forest Service Pacific Southwest Research Station, Arcata, CA, U.S.A., Introduced trout affect ecosystem subsidy and a threatened frog.

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Poster # 183. Limburg, Karin^*,1, Caraco, Nina², Harvey, Rodger³, Ju, Se-Jong³, Schmidt, Robert⁴, ¹ SUNY Coll. Environmental Science & Forestry, Syracuse, NY, USA² Institute of Ecosystem Studies, Millbrook, NY³ Chesapeake Biological Laboratory, Solomons, MD⁴ Hudsonia Ltd., Annandale-on-Hudson, NY, Blueback herring trophic responses to zebra mussels and range expansion in the Hudson River watershed, New York.

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Poster # 184. McHugh, Amani^*,1, McHugh, Oloro^*,2, Richardson, Curtis¹, Steenhuis, Tammo², ¹ Nicholas School of the Environment and Earth Sciences, Durham, NC, USA² Department of Biological and Environmental Engineering, Ithaca, NY, USA, A case study of the consequences of watershed landcover change and land degradation on Hara wetland, Amhara Region, Northern Ethiopia.

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Poster # 185. Paavola, Riku^*,1, Jackson, Donald¹, ¹ University of Toronto, Toronto, Canada, Speedy recovery - stream macroinvertebrate communities of Wawa, Ontario show extraordinary recovery from severe mining-related acidification.

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Poster # 186. Schaumburg, Kristin¹, Langellotto, Gail¹, Giuliano , William, ¹ Louis Calder Biological Field Station, Armonk, NY, USA, Habitat influences on arthropod abundance and diversity in Connecticut salt marshes.

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Poster # 187. Schilling, Emily^*,1, DeGoosh, Katie², Loftin, Cynthia³, Huryn, Alex⁴, Butler, Ronald⁵, DeMaynadier, Phillip⁶, ¹ University of Maine, Orono, ME² University of Maine -, Orono, ME³ USGS-Maine Cooperative Fish and Wildlife Research Unit, Orono, ME⁴ University of Alabama -, Tuscaloosa, AL⁵ University of Maine -, Farmington, ME⁶ Maine Department of Inland Fisheries and Wildlife -, Bangor, ME, Assessing the geographic distribution and invertebrate biodiversity of naturally fishless lakes in Maine, USA.

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Poster # 188. Webster, Katherine^*,1, Anderson, Dennis², Schilling, Emily², Loftin, Cynthia^{2, 3}, DeGoosh, Katie², ¹ University of Maine, Orono² University of Maine, Orono³ Maine Cooperative Fish and Wildlife Research Unit, Orono, Landscape setting influences control of cladoceran body size and abundance by fish in small lakes in Maine.

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Poster # 189. Simmons, Matthew^*,1, Wu, X. Ben¹, Whisenant, Steven¹, ¹ Texas A&M University, College Station, Texas, Influences of topographic setting, planted species composition, and soil treatment on ecosystem development in a restored urban wetland.

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Poster # 190. Aksissou, Mustapha¹, ¹ Departement of Biology Faculty of Science PO Box 2121, Tetouan, Tetouan, Morocco, Management impact on the NW coastal wetlands of Morocco.

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Poster # 191. BARIAR, RAJESH KUM,AR¹, ¹ DEPT.OF ZOOLOGY, S. SINHA COLLEGE AURANGABAD, AURANGABAD, BIHAR, INDIA, biodiversity and ecological investigations of wetlands of aurangabad wetlands of bihar india.

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Poster # 192. Perisic, Snezana^*,, Mijatovic, Miroslava, Djurdjevic, Lola , Karadzic, Branko , Velickovic, Miroslava, , Humidity as a factor of dofferentiation of community Lemnetum minoris Th. Muller et Gors1960.

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Poster # 193. Ghassemzadeh, F.^*,1, Matinfar, A.², Jamili, SH.², Zarei, A.R.², ¹ Biology Department, Mashhad, Iran² Marine Biology Department, Tehran, Iran, Limnological studies of Gonabad playa, northeast, Iran: Implication in Artemia production.

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Poster # 194. Hopfensperger, Kristine^*,1, Engelhardt, Katharina ¹, ¹ University of Maryland Center for Environmental Science Appalachian Laboratory, Frostburg, MD, USA, The effect of landscape pattern on seed bank dynamics in a tidal freshwater wetland.

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Poster # 195. Ishii, Jun^*,1, Kadono, Yasuro², ¹ University of Tokyo, Bunkyo, Tokyo, Japan² University of Kobe, Kobe, Hyogo, Japan, Factors influencing the depth distribution of amphibious plants in an irrigation pond.

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Poster # 196. Kovecses, Jennifer^*,1, Theysmeyer, Tys¹, ¹ Royal Botanical Gardens, Burlington, ON, Canada, The role of freshwater coastal sanctuaries in restoring and protecting fish communities.

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Poster # 197. Shirley, Laura^*,1, Battaglia, Loretta ¹, Platt, William², ¹ Southern Illinois University-Carbondale, Carbondale, IL² Louisiana State University, Baton Rouge, LA, Fifty Years of vegetation change in estuarine coastal transitions across the northern Gulf of Mexico.

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Poster # 198. Stroh, Chrissa¹, De Steven, Diane^*,2, Guntenspergen, Glenn³, ¹ The College of Charleston, Charleston, SC, USA² USDA Forest Service, Charleston, SC, USA³ U.S. Geological Survey, Duluth, MN, USA, Effect of drought cycles on long-term vegetation dynamics in Carolina bay wetlands.

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Poster # 199. Suzuki, Shizuo^*,1, ¹ Institute for Environmental Sciences, Rokkasho, Aomori, Japan, Effects of water table gradient and soil characteristics on herbaceous vegetation patterns in a wetland.

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Poster # 200. Troxler Gann, Tiffany^{*,1, 2, 3}, Childers, Daniel^{1, 2, 3}, ¹ Department of Biological Sciences, Miami, FL² Sotheast Environmental Research Center, Miami, FL³ Florida Coastal Everglades Long Term Ecological Research, Miami, FL, Investigating groundwater flow in an Everglades tree island.

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Poster # 201. Tulbure, Mirela¹, Johnston, Carol¹, ¹ South Dakota State University, Brookings, SD, USA, A Rapid Expansion of Phragmites australis in a Great Lakes Coastal Wetland.

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Poster # 202. Urgelles, Raul¹, Dorn, Nathan¹, Trexler, Joel¹, ¹ Florida International University, Miami, FL, USA, The spatial distribution and relative abundance of larval dragonflies found in the freshwater marshes of the Florida Everglades.

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Poster # 203. Clark, Michael Rawson^*,1, Graham, Mark¹, Christensen, Michael¹, Vinebrooke, Rolf¹, ¹ Department of Biological Sciences, Edmonton, AB, Canada, Stoichiometric effects of climate regimes on planktonic food for herbivores.

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Poster # 204. Cottingham, Kathryn^*,1, ¹ Dartmouth College, Hanover, NH, Does ecological theory successfully predict how freshwater plankton communities respond to and recover from perturbation?

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Poster # 205. Cox, Michael^{*,1, 2}, Horn, Shannon^{1, 2}, Esposito, Rhea^{1, 2}, Spaulding, Sarah^{1, 2}, Lubinski, David¹, McKnight, Diane^{1, 2}, ¹ Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO² McMurdo Dry Valleys Long Term Ecological Research Project, Boulder, CO, The Antarctic Freshwater Diatoms Website, as an Initial Design Implementation of our Web-based Algal Regional Research Database (WARRD) Model.

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Poster # 206. Hembre, Leif^*,1, Spitael, Maria², Megard, Robert², McAlpine, Rachel¹, Hondzo, Miki², ¹ Hamline University, St. Paul, MN, USA² University of Minnesota, Minneapolis, MN, USA, Spatial ecology of predator and prey in a Minnesota Lake.

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Poster # 207. James, Leah ^*,1, Xenopoulos, Marguerite², ¹ Trent University, Peterborough, Ontario, Canada² Trent University, Peterborough, Ontario, Canada, Global concordance in species richness among freshwater taxonomic groups.

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Poster # 208. Kellerhals, Doyn^*,1, Lemke, Michael¹, ¹ University of Illinois at Springfield, Springfield, IL, USA, Bacterial Succession on Acer saccharinum Leaves in the Illinois River Floodplain.

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Poster # 209. Kim, Seon-Young^*,1, Lee, Seung-Hoon^*,1, Kang, Hojeong ^*,1, Fenner, Nathalie ^*,2, Freeman, Chris ^*,2, ¹ Dep. of Environmental Science & Engineering, Ewha Womans University, Seoul, South Korea² School of Biological Sciences, University of Wales, Bangor, UK, Impact of elevated CO₂ and temperature on the structure of microbial communities in a peatland.

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Poster # 210. Knoll, Lesley^*,1, Gonzalez, Maria¹, Vanni, Michael¹, ¹ Miami University, Oxford, OH, Effects of dissolved nutrients, allochthonous sediments, and larval gizzard shad on zooplankton communities.

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Poster # 211. Lyon, Jonathan¹, Berg, Lauren^*,1, ¹ Merrimack College, North Andover, MA, Temporal and spatial changes in macrophyte composition in a shallow turbid lake.

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Poster # 212. Moran, Emily^*,1, Wildova, Radka^*,2, ¹ University of Michigan, Ann Arbor, MI² Acad Sci Czech Republ, Inst Bot, Pruhonice, Czech Republic, Growth responses of three typha species to water depth and nutrient levels.

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Poster # 213. Saito, Laurel^*,1, Rosen, Michael², Fritsen, Christian³, Fay, Christa¹, Chandra, Sudeep¹, ¹ University of Nevada, Reno, Reno, NV, USA² United States Geological Survey, Carson City, NV, USA³ Desert Research Institute, Reno, NV, USA, Food web stable isotopes and organic contaminants in the Truckee River, Nevada, USA.

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Poster # 214. Saunders, Patricia¹, Fleming, Jessica¹, Carlson, Kristina¹, Miller, Timothy¹, ¹ Ashland University, Ashland, OH, U.S.A., Early evidence for diel horizontal migration of Daphnia in dimictic Sites Lake, OH.

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Poster # 215. Sircom, Julie^*,1, Walde, Sandra¹, ¹ Dalhousie University, Halifax, NS, Measuring competition among predatory aquatic insects.

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Poster # 216. Stenberg, Marika^*,1, Persson, Anders¹, ¹ Lund University, Lund, Sweden, Patch use behaviour in benthic fish depends on their ong-term growth prospects.

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Poster # 217. Twombly, Saran ^{1, 2}, Hobbs, Tom³, ¹ University of Rhode Island, Kingston, R. I.² National Science Foundation, Arlington, VA³ Colorado State University, Fort Collins, CO, Composite forces shape population dynamics of copepod crustaceans.

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Poster # 218. Acholonu, Alex¹, Watts, YaDanna^*,1, ¹ Alcorn State University, Alcorn State, MS, Assessment of water quality of a pond at Alcorn State University campus.

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Poster # 219. Ashforth, Dawn^*,1, Yan, Norman^{*,1, 2}, ¹ York University, Toronto, ON, Canada² Ministry of the Environment, Dorset, ON, Canada, Fitness consequences of declining ambient calcium best described by the intrinsic rate of increase and not juvenile growth rate for Daphnia.

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Poster # 220. Ottensmeier, Shelly¹, Brugam, Richard ^*,2, Retzlaff, William ^{1, 2}, ¹ Environmental Sciences Program, Edwardsville, IL, USA² Department of Biological Sciences, Edwardsville, IL, USA, Stable isotopes of nitrogen as indicators of the source of lake sediment organic matter.

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Poster # 221. Campbell, Eleanor^*,1, Dawson, Amy¹, Conner, Kristina¹, Lennon, Jay¹, Faiia, Anthony¹, Cottingham, Kathryn¹, ¹ Dartmouth College, Hanover, NH, 03755, Changes in stable carbon isotope signatures in three temperate lakes associated with autumn lake destratification.

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Poster # 222. Pray, Corey^*,1, Nowlin, Weston¹, Vanni, Michael¹, Stevens, Henry¹, Gonzalez, Maria, Fields, Matthew¹, ¹ Miami University, Oxford, Ohio, U.S, Potential impacts of deposition and decomposition of 17-year periodical cicadas; on woodland ponds and streams.

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Poster # 223. Valente, Jonathon^*,1, González, María¹, Nowlin, Weston¹, Vanni, Michael¹, Fields, Matthew¹, Stevens, M. Henry¹, ¹ Miami University, Oxford, OH, U.S.A., Effects of the 17-year periodical cicada emergence on zooplankton communities in woodland ponds.

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Poster # 224. Dawson, Amy^*,1, Campbell, Eleanor¹, Cottingham, Kathryn, ¹ Department of Biological Sciences, Hanover, New Hampshire, United States, Chemical and biological variation in four New Hampshire lakes in the summer and fall of 2004.

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Poster # 225. Dickman, Elizabeth^*,1, Vanni, Michael¹, Horgan, Martin¹, ¹ Miami University, Oxford, Ohio, Phytoplankton stoichiometric reponse to the interactive effects of light and nutrients.

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Poster # 226. Horgan, Martin^*,1, Vanni, Michael¹, ¹ Miami University, Oxford, Ohio, U.S.A., Effects of nitrogen form supplied on phytoplankton composition and stoichiometry: Tests at multiple scales.

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Poster # 227. Lawniczak, Agnieszka Ewa^*,1, Verhoeven, Jos T.A.¹, ¹ Utrecht University, Utrecht, The Netherlands, Effect of N, P and K supply on biomass and nutrient concentration of 12 plant species.

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Poster # 228. Maranger, Roxane^{*,1, 2}, Canham, Charles², Pace, Michael², Papaik, Michael², ¹ Université de Montréal, Montréal, Québec, Canada² Institute of Ecosystem Studies, Millbrook, New York, US, A Spatially-Explicit Model of Iron Loading to Lakes.

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Poster # 229. Wheeler, Sarah¹, Morrissey, Leslie^*,1, Levine, Suzanne¹, Vincent, Warwick², ¹ University of Vermont, Burlington, VT, USA² Universite Laval, Quebec City, Canada, Mapping cyanobacteria blooms in Lake Champlain at multiple scales: a comparison of three satellites.

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Poster # 230. Osland, Michael¹, Richardson, Curtis¹, ¹ Nicholas School of the Environment and Earth Sciences, Durham, NC, USA, Nutrient availability and macrophyte variability across hydrologic gradients in the lacustrine wetlands of El Salvador, Central America.

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Poster # 231. Park, Jin-Sung^*,1, Chang, Yoon-Jung¹, Kim, Ok Kyung², Lee, In-Sook¹, ¹ Ewha Womans University, Seoul, Korea² Anyang University, Anyang, Kyunggi-do, Korea, Assessment of surface water quality on two golf courses in Korea and Cd uptake by water lettuce.

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Poster # 232. Taranu, Zofia^*,1, Finney, Bruce², Gregory-Eaves, Irene¹, ¹ Dept. of Biology, McGill University, Montreal² Institute of Marine Science, University of Alaska Fairbanks, Fairbanks, Assessing the role of salmon-derived nutrients in shaping algal composition, biomass and quality as forage in Alaskan sockeye salmon nursery lakes.

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Poster # 233. Tiegs, Scott^*,1, Robinson, Chris², Peter, Fabian¹, Uehlinger, Urs², Gessner, Mark¹, ¹ Department of Limnology, Kastanienbaum, Switzerland² Department of Limnology, Duebendorf, Switzerland, Influence of organic-matter standing stock on leaf-litter decomposition in streams.

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