Tuesday 6th February 2001

Tuesday 6^th February 2001 Session: Plankton Ecology I Phytoplankton

Room: Rotunda I

Chair Susan Kilham

10.30 Karen Wiltshire, Algal Population Composition and Biomass Determined In Situ with Accessory Pigment Induced Fluorescence Methods

10.45 Susan Kilham, S.M. Taylor, Silicon and Nitrogen requirements of two closely related species, Stephanodiscus niagarae and Stephanodiscus yellowstonensis

11.00 Kristiina Vuorio, J. Sarvala, A. Ventela, M. Tarvainen, M. Meili, Stable Carbon and Nitrogen Isotopes in Lake Plankton/Seston: Variability among 13 Fractions, Two Seasons and Two Lakes

11.15 Lauri Arvola, A. Palomaki, S. Lehtinen, M. Jarvinen, Phytoplankton Community Structure And Biomass In Two Boreal Lakes In Relation To North Atlantic Oscillation And Local Weather Conditions

11.30 S. Wallace, T. Kobayashi, A. Church, The Application of Acoustic Doppler Current Profiler Backscatter Data to Asses the Temporal and Spatial Distribution of Plankton in an Australian Reservoir

11.45 Dieter Lessman, B. Nixdorf, Seasonal Succession of Phytoplankton in Acidic Mining Lakes

12.00 J. Koehler, K. Ockenfeld, K. Bahnwart, M. Bahnwart, Light-Adaptation of Phytoplankton in Lowland Rivers and Shallow Lakes

12.15 Mikaela Kruskopf, M.M. Du Pleiss, A.H.J. Pieterse, High Phytoplankton Acid and Alkaline Phosphatase Activity in the Vaal River (South Africa)

Session: Foodwebs Dynamics and Predator Prey Interactions IV

Room: Rotunda 4

Chair Elizabeth Gross

10.30 Ram Kumar, Effects of Mesocyclopsthermocyclopoides Predation on the Population Growth Patterns of Different Prey Species

10.45 Tanya Rankin, Importance of Platypuses to the Structure of Macroinvertebrate Communities: Top-Down Predation Effects

11.00 Danielle Warfe, Can Habitat Complexity Initiate a Trophic Cascade?

11.15 Brendan McKie, Where Chironomids Dare: Do Predators Influence Where Larval Midges choose To Build Their Tubes?

11.30 J. Grey, Chironomid Contributions To Lake Food Webs: Questions Arising From Stable Isotope Analysis

11.45 Elisabeth Gross, R. Kornijow, Investigation on Competitors and Predators of Herbivorous Aquatic Leipidoptera Larvae (Acentria Ephemerella) on Submerged Macrophytes

12.00 F.D. Hulot, M. Tolian, G. Lacroix, M. Loreau, Fish Load Effect on the Abundance of Trophic Groups of Freshwater Food Web: A Meta-Analysis

12.15 Kwang-Seuk Jeong, H-W. Kim, The Role of Zebra Mussel in the Microbial Food Web in the Lake-River Ecosystem (River Spree, Germany)

12.30 Kwang-Seuk Jeong, M-H. Jang, Distribution and Role in the Food Web of Introduced Fishes in Large River Systems of S.Korea

Session: Wetlands

Room: Humanities I

Chair Kay Morris

10.30 Luigi Flores, R. Barone, Limnology of A Small, Temporary Water Body: The Pond of Santa Rosalia (Sicily Italy)

10.45 Motta Marques, S. Giovannini, Allometry In Scirpus californicus In Response To Wetland Water Regime

11.00 Motta Marques, S. Giovannini, Reproductive And Growth Strategies of Solanum glaucophyllum In Response To Wetland Water Levels

11.15 Kay Morris, G. Granf, The Influence of Aquatic Vegetation on Evaporative Water Loss from Wetlands

11.30 Forrest Dierberg, T.A. DeBusk, K.C. Pietro, J.A. Potts, Biological Uptake vs Coprecipitation of Soluble Reactive Phosphorus by P-Enriched and P-Starved Najas guadalupensis in Hard and Soft Waters

11.45 Lisa Belyea, L. Lancaster, Inferring Long-term Dynamics Of Bog Pools Scaling Relationships And Spatial Patterns

12.00 Marth Rendon Lopez, C. Rosas-Monge, A. Chacon-Torres, Wetland deterioration by untreated sewage in a central Mexican plain

12.15 David Biesboer, Nitrogen Balance in Iron Springs Bog: A Coniferous Seepage Slope

Tuesday 6^th February – Oral Sessions

11.45	Lisa Belyea, L. Lancaster, Inferring Long-term Dynamics Of Bog Pools Scaling Relationships And Spatial Patterns
12.00	Marth Rendon Lopez, C. Rosas-Monge, A. Chacon-Torres, Wetland deterioration by untreated sewage in a central Mexican plain
12.15	David Biesboer, Nitrogen balance in Iron Springs bog

Session: Conservation and Management of Running Waters I

Room: Humanities 4

Chair Leon Metzeling

10.30 Brian Whitton, M. Christmas, N.T.W. Ellwood, Use of Phosphatase Activities of Phototrophs for Routine Monitoring of Rivers and Streams

10.45 John Wright, R.J.M. Gunn, J.M. Winder, R. Wiggers, N.T. Kneebone, R.T. Clarke, The Impact of Drought Events in 1976 and 1997 on the Macroinvertebrate Fauna of a Chalk Stream

11.00 L. Metzeling, F. Wells, P. Newall, The Development And Testing Of Biological Objectives For The Protection Of Rivers And Streams

11.15 Klaus Koop, P. Scanes, Developing Environmental Objectives from Short, Focussed River Surveys

11.30 MarcusWishart, B.R. Davies, Considerations of Scale for Conserving River Basin integrity in Relation to Inter-Basin Water Transfers

11.45 Huong Hoang, F. Recknagel, Neural Network Predictions of Macroinvertebrate Assemblages for Stream Habitat Assessment in Queensland (Australia)

12.00 Ferdy De Moor, Shortcomings and Advantages of using Rapid Biological Assessment Techniques for Determining the Health of Rivers in South Africa

12.15 Mike Joy, R.G. Death, Assessing Stream Health Using a Reference Site Predictive Model of Fish Occurence

Session: Hyphorheos and Groundwater

Room: Humanities 5

Chair Andrew Boulton

10.30 Andrew Boulton, S. De Pauw, P. Marmonier, Hyporheic Dynamics in a Degraded Rural Stream Carrying a 'Sand Slug'

10.45 Elisabeth Meyer, H.P. Escher, Input of Fine Particles Into Hyporheic Interstices of a Coarse Gravel Stream

11.00 Nicole Saenger, I. Seydell, Temporal and Spatial Variability of Permeability in a Gravely Riverbed

11.15 Cecile Claret, J.V. Ward, K. Tockner, Temperature Heterogeneity of Interstitial Water in Island - Associated Waterbodies of a Dynamic Flood Plain

11.30 D. Brochardt, J. Fischer, Oxygen Balances in the Hyporheic Zone of Eutrophic Rivers: A Dynamic Bottleneck for Ecological Functions

11.45 Ralph Ibisch, J. Fisher, D. Borchardt, Effects of Periphyton Biomass and Suspended Solids on River Bed Permeability

12.00 H. Duff, S.P. Hendricks, A.P. Jackman, F.J. Triska, Porewater Solute Chemistry and Sediment Microbial Respiration Associated with an Elodea Bed in a Sand and Gravel Bottom Stream in North Central Minnesota, USA

12.15 Nicol Saenger, Estimation of Flow Velocities within the Hyporheic Zone

12.30 Frank Kloep, I. Roske, Seasonal and Diurnal Nitrogen Dynamic in the Hyporheic Zone of the Upper Part of the River Elbe, Germany

Session: Biodiversity and Distribution of Freshwater Organisms I

Room: Humanities 6

Chair Hugo Blatterer

10.30 Ann Schartau, A. Hobaek, Biodiversity In Urban Ponds And Small Lakes: Effects of size and pollution.

10.45 Karen Sutcliffe, J. Davis, S. Halse, Factors Affecting The Distribution Of Plecoptera In South-Western Australia

11.00 H. Blatterer, Some Conditions for the Distribution and Abundance of Ciliates (Protozoa) in Running Waters- Do we Really Find Every Species Everywhere?

Tuesday 6^th February – Oral Sessions

11.15	Jani Heino, T. Muotka, R. Paavola, L. Paasivirta, Species Richness Patterns in Aquatic Insect Assemblages of Boreal Streams: Are there Differences Among Taxonomic Groups
11.30	Nina Hemphill, E. Garcia, Factors Influencing the Conservation of Freshwater Decapod Crustaceans in Puerto Rico
11.45	M.T. Monaghan, M. Hieber, C.T. Robinson, Patterns of Epheroptera, Plecoptera, and Trichoptera Diversity in Three Alpine Streams Fragmented by Lakes.
12.00	D. Arscott, O. Glatthaar, K. Tockner, J.V. Ward, Larval Blackfly Distribution and Diversity Along a Dynamic Gravel-Braided Floodplain River in the Alps
12.15	Christian Fesl, Biodiversity and Niche Partitioning of Macroinvertebrate Communities in Relation to Environmental Factors in a Large, Deep River

Session: Potential Impacts of Climate Change on Large Lakes

Room: South 1

Chair Brent Lofgren

10.30 Gideon Gal, J. Imberger, J.R. Romero, Understanding The Factors Contributing to The Rise in Water Temperature in A Stratified Lake with Long-Term Simulations

10.45 Brent Lofgren, A. Herche, K. Cronk, Contemporary and Possible Future Great Lakes Ice Cover

11.00 Gesa Weyhenmeyer, R. Adrian, U. Gaedke, D.M. Livingston, S. Maberly, Phytoplankton in European Lakes and a Sudden Change in Global Climatic Conditions - What Effect can be Seen

11.15 Brent Lofgren, F. Quinn, Assessment of Climate Change Effects on Laurentian Great Lakes Water Resources

11.30 Rita Adrian, D. Gerten, Persistency Of North Atlantic Oscillation Signals In Lakes Differing In Thermal Regime

11.45 Thorsten Blenckner, K. Pettersson, J. Padisak, Lake Plankton As Tracer To Discover Climate Signals A Study At Lake Erken, Sweden

12.00 William Chang, Chinese Great Lakes: Their Changes And Impacts

12.15 Kurt Pettersson, Seasonality Of Nutrients In Lake Erken - Effects Of Weather Conditions.

12.30 Brent Lofgren, A. Arbor, Coupled Atmosphere-Land-Lake Climate Simulation Using a Regional Model

Session: Plankton Ecology II

Room: Rotunda 1

Chair Vlad Matveev

1.30 L.C. Souza, C.W.C. Branco, F.A. Esteves, Rotifiers as Ecological Indicators in Three Coastal Lagoons in Rio de Janeiro, Brazil

1.45 Daryl Nielsen, J.D. Green, Are Successional Patterns In Billabongs The Same?

2.00 Motta Marques, V. Becker, L. Cardoso, S. Giovannini, Spring To Autumn Biovolume Variation In Two Species Of Keratella (Rotifera) In Response To Location In a Subtropical Freshwater Coastal Lagoon

2.15 Vladimir Matveev, L. Matveev, Seasonal Dynamics Of Net Planktonic Rotifers In Two Subtropical Reservoirs In Relation To Potential Predators And Food Base.

2.30 Rafael Arocena, N. Prat, Design And Evaluation Of Benthic Mesocosms For Coastal Lagoons

2.45 Irene Karlsson, P. Karlsson, N. Strombeck, The Use of Image Analysis for Biomass Estimation of Gloeotrichia echinulata

3.00 Sandra Du Plessis, M.M. Kruskopf, A.J.H. Pieterse, Characterisation of Diel Fluctuations of Phosphatase Nitrate Reductase Activities in Vitro and in Situ in The Vaal River (South Africa)

Session: Ecology of Specific Water Bodies

Room: Rotunda 4

Chair John Magnuson

1.30 Ernst Nusch, Comparative Long-term Investigations Into Westphalian Reservoirs

1.45 Guntram Weithoff, Growth and Grazing under Extremely Acidic Conditions (pH 2.7) by Cephalodellahoodi (Rotatoria)

2.00 James Schindler, S.L. Stokes, K. Celik, Linville River Storm Flow Phosphorus Loading To Lake James, North Carolina, USA

2.15 Martin Schultze, B. Kuehn, B. Boehrer, M. Winkler, P. Herzsprung, Neutralization Of Acidic Mining Lakes By Filling With River Water

Tuesday 6^th February – Oral Sessions

2.30	Gianni Tartari, A. Marchetto, D. Copetti, Northern Italian Lakes: Regionalisation of Limnological Features and Pressure Factors Relationships.
2.45	James La Bounty, The Influence of Wastewater Drainage from the Las Vegas Valley on the Limnology of Baulder Basin of Lake Mead, Nevada Arizona (USA)
3.00	John Magnuson, Three Generations Of Limnology At The University Of Wisconsin-Madison
3.15	M. Kraska, R. Piotrowicz, H. Zelag-Wasielewska, E. Goldyn, P. Klimaszyk, Variability Of Trophic State and Vegetation in lakes of Drqwienski National Park (Northern Poland)

Session: Predicting and Managing Wetland Reponse to Environmental Change

Room: Humanities 1

Chair Jenny Davis

1.30 M.A. Brock, Seed Bank and Vegetation Responses to Timing, Duration and Frequency of Flooding in Temporary Wetlands: A Revegetation Tool?

2.00 Nick Fenner Temporal Variation in the Responses of Peatland Carbon Cycling to Temperature

2.15 Emma Gale, C.E. Oldham, Application of Predictive Numerical Modelling on a Shallow Wetland: Case Study- Lake Yangebup, WA

2.30 Pierre Horwitz, J.A. Davis, A.J. McComb, The Development and Application of Conceptual Models for Predicting Wetland Response

2.45 Bea Sommer, P. Horwitz, Using Carbon Cycling As A Surrogate For Wetland Function In Conceptual Modelling

3.00 Megan McGuire, J.A. Davis, D. Hamilton, B. Robson, Predicting Wetland Response to Nutrient Enrichment: Modelling Algal Blooms and Nuisance Midge Swarms

3.15 Barbara Robson, P.D. Hamilton, J.A. Davis, M.McGuire, Predicting Wetland Response To Climatic Variability: Modelling Cyanobacterial Succession And Vertical Migration

Session: Conservation and Management of Running Waters II

Room: Humanities 4

Chair David Allan

1.30 Oyvin Schnell, The Effects on the Chironomid (Diptera) Fauna of Rotenone Treatment of Alpine Brooks and Ponds at Hardangervidda, Norway, with a Comparison to Similar Adjacent and Untreated Habitats

1.45 G.G.Raddum , J.A. Gladson, Rotenone Treatment of a West Norwegian River, Effects on Drift of Invertebrates

2.00 laude Hansen, R. Psenner, The Evolution of Gis-Techniques in Combination to Limnological Monitoring Tasks

2.15 Mark Weatherhead, T. Snelder, B. Briggs, A. Suren, Physical Classification of Rivers as a Tool for Environmental Management

2.30 Gunther Friedrich, Classification and Assessment of River Morphology - A Contribution to the Assessment of River Integrity

2.45 Adrian Jakob, Long-Term Studies of Swiss Rivers

3.00 J.David Allan, R. Abell, Riparian Shade and Stream Temperatures in an Agricultural Catchment

3.15 Arne Jensen, B.O. Johnsen, Effect of Reduced River Discharge on Size of Adult Atlantic Salmon

Session: Genetics of Freshwater Organisms

Room: Humanities 5

Chair Jane Hughes

1.30 Jane Hughes, M. Hilyer, Variation IN Mitochondrial DNA At Different Spatial Scales In A Baetid Mayfly

1.45 Peter Starkweather, Phylogeographic Structure Of Zooplankton Populations From Montane Lakes Of The North American Great Basin

Tuesday 6^th February – Oral Sessions

2.00	D. Uhlmann, I. Roske, M. Grobe, C. Bleul, Microbial Structure Of The Sediment-Water Interface In Reservoirs
2.15	K. J Harper, Development of Hip 1 PCR Typing Technique To Analyse The Diversity Of Cyanobacteria

Session: Biodiversity and Distribution of Freshwater Organisms II

Room: Humanities 6

Chair Richard Marchant

1.30 Rhonda Butcher, P.S. Lake, R. Marchant, Variability In Aquatic Invertebrate And Plant Communities In Temporary And Permanent Wetlands

1.45 Adrian Pinder, S.A. Halse, R.J. Shiel, J.M. McRae, D.J. Cale, D.J. Pennifold, Diversity, Endemism And Conservation Of The Invertebrate Fauna Of Saline Wetlands In Southern Australia

2.00 Erica McAlister, C. Oanne, P. Shaw, The Effect of Macrophyte Planting on the Invertebrate Community on a Grazing Marsh

2.15 Seppo Hellsten, Aquatic Macrophytes as the Indicators of Water Level Regulation in Northern Finland

2.30 Micael Jonsson, B. Malmqvist, The Importance of Species Richness for Ecosystem Process Rates in Different Functions

2.45 Thomas Weisse, The Ecological Significance of Intraspecific Variation amoing Freshwater Ciliates

3.00 Marcus Wishart, J.A. Day, Endemism in the Freshwater Fauna of the South-Western Cape, South Africa

3.15 Helmut Hiellebrand, Diversity on unicellular aquatic organisms scaled to body size

Session: Palaeolimnology and Environmental Change

Room: South 1

Chair Suzanne Linnane

1.30 M. Barry, A. Tsitsalis, J. Tibby, B. Mason, P. Kershaw, H. Heijnis, Micro-Evolution of a Daphnia Population in Relation to Anthropogenically-Disturbance: A Study Using Resurrection Ecology

1.45 Irene Gregory-Eaves, J. Finney, M. Douglas, J. Sweetman, J. Smol, Hindcasting Pacific Salmon Abundances Using Paleolimnology

2.00 Suzanne Linnane, D.A. Murray, Hindcasting Recent Trends in Trophic Status of Lakes on the River Shannon, Ireland - Results from short Sediment Core Analyses

2.15 Uwe Selig, T. Hubener, A. Schwarz, T. Leipe, The Environmental History Investigations Of A Postglacial Dimictic Lake In North Germany

2.30 Koen Sabbe, Late Quaternary climate History Of Heart Lake And Pup Lagoon (Larsemann Hills, E-Antarctica)

2.45 Carl Sayer, A. Burgess, M. Jackson, Nutrients Or Fish? Inferring Long-Term Biological Changes And Causes Using The Palaeoecological Record Of A Shallow Lake

3.00 K Ruhland, J.P. Smol, Limnological Attributes of 77 Lakes in the Central Canadian Arctic Treeline Region

Session: Plankton Ecology III Zooplankton

Room: Rotunda 1

Chair Tsuyoshi Kobayashi

4.00 Z Liu, Changes in Abundance of the Icefish Neosalanx pseudotaihuensis Zhang (Salangidae) and the Impact on the Zooplankton Community of Xujiahe Reservoir, Central China

4.15 Winifried Lampert, Ecosystem Properties and Individual Fitness Optimization: Daphnia's Response to Deep-Water Algal Maxima

4.30 T. Kobayashi, A. Church, Effects of Macronutrients and Zooplankton Grazing on the Phytoplankton Community Biomass in an Australian Reservoir

4.45 Ragnar Lagergren, H. Lord, J.A.E. Stenson, Temperature Viscosity and Cyclomorphosis: An Old Hypothesis in a New Way

5.00 Sulmin Gumiri, T. Iwakuma, The Dynamics of Rotiferan Communities in Relation to Environmental Factors: Comparison Between Two Tropical Oxbow Lakes With Different Hydrological Conditions

5.15 C.W.C Branco, F.A. Esteves, B. Kozlowsky-Suzuki, T. Aguiaro, Environmental Factors and Predation Pressure Effects on Zooplankton Spatial and Temporal Variation in a Brazilian Coastal Lake

5.30 E. Everbecq, L. De Meester, V. Gosselain, L. Viroux,, J.P. Descy, Modelling the Impact of Benthic Filter-Feeders on Potamoplankton Composition and Biomass

5.45 Johan Grobbelaar, Variations in Toxicity and Growth Characteristics of Different Microcystis Species

Tuesday 6^th February – Oral Sessions

Session: Carbon Cycling in Lakes and Wetlands

Room: Rotunda 4

Chair Rob Striegl

4.00 Brian Sorrell, Methane Transport And Release By Submerged And Flowering Potamogeton crispus.

4.15 Pirkko Kortelainen, M. Rantakari, J. Huttunen, J. Alm, S. Juutinen, M. J. Silvola, P. Martikainen, Seasonal Depth Profiles of CH4, CO2 and N2o in Finnish Lakes Seasonal Depth Profiles of CH4, CO2 and N2o in Finnish Lakes

4.30 Rob Striegl, P. Kortelainen, J.P. Chanton, Carbon Dioxide Partial Pressure And C Content Of Northern And Alpine Lakes At Turnover

4.45 Yves Prairie, D.F. Bird, The Metabolic Balance In The Epilimnion Of Lakes.

Session Ecology of Streams and Rivers I

Room: Humanities 1

Chair Jack Webster

4.00 Eren Turak, G. Hose, Large-Scale Patterns in the Integrity of Macroinvertebrate Assemblages from Rivers

4.15 Claire McKenny, Algae And Grazers In South East Queensland Streams

4.30 Jack Webster, Wood Accumulation in Nyack Creek, Montana, U.S.A.

4.45 Catherine Rommens, K, Beaugelin-Seiller, Strategy For Monitoring Radioactivity In Freshwater Ecosystems : Application to Model Validation

5.00 F. Wagner, A New Method For Quantitative Bottom Sediment Sampling

5.15 Sergey Komulaynen, Periphyton in Lake-River Systems- An Ecotone within an Ecotone

Session: Conservation and Management of Running Waters III

Room: Humanities 4

Chair Ferdy de Moor

4.00 M. Bowman, D.W. Schindler, P.A. Chambers, Isolating Nutrient Limitation Thresholds to Restore the Ecological Integrity of Rocky Mountain

4.15 C. Fjorback, B. Kronvan, Interaction Between Aquatic Macrophytes and Stream Hydraulics: Implications of Different Weed Cutting Methods

4.30 Eugene Welch, D.A. Elswick, B.W. Mar, Prediction of Periphytic Algal Biomass Downstream from a Nutrient Pointsource

4.45 Micaelo Granero, Limnology of Mountain Rivers and Transport of P and N to an Eutriphicated Reservoir

5.00 Leon Barmuta, L. Emerson, P. Otahal, Sensitivity of a rapid biological assessment method to measurement errors

Session: Biodiversity and Distribution of Freshwater Organisms III

Room: Humanities 5

Chair Jonathon Richardson

4.00 Jonathan Richardson, How similar are the Diatom Floras of Australia's Alkaline Monaro Lakes to those of Chemically Similar Lakes How similar are the Diatom Floras of Australia's Alkaline Monaro Lakes to those of Chemically Similar Lakes Elsewhere?

4.15 Odete Rocha, Hot Spots for Zooplankton Diversity in Sao Paulo State: Origin and Maintainance

4.30 Marc Schallenberg, C.Hall, R. Zehrer, C. Burns, Effects Of Salinity On Zooplankton Community Structure And Life History Parameters In A Tidal, Coastal Lake: Implications Of Sea Level Rise For Ecosystem Function

4.45 Sabine Floeder, J. Urabe, The influence of Fluctuating Irradiance intensities on Succession and Diversity of Natural Phytoplankton Communities from Lake Biwa, Japan

5.00 Ole Mathisen, N. Haubenstock, Trophic Ranking of the Biota in Lake Iliamna, Alaska

5.15 Smith R, Variation Of The Intergenic Region Of The Phycocyanin Gene: The Basis For A DGGE Based Cyanobacterial Typing Technique?

Tuesday 6^th February – Oral Sessions

Session: Sustainable Aquaculture

Room: South 1

Chair B. Jana

4.00 B.B. Jana The Wastewater Resources for Aquaculture: The Need for Sustainable Development

4.15 Geraldine Matolla, Effect of Yeast Glucan On Immunostimulation of Cellura Non-specific Defences and Survival of Artic Charr (Salvelinus alpinus L.)

4.30 Keshavanath Perar, Performance of an Indigenous Carp, Tor Khudree in Fed and Non-Fed Tanks with Different Bamboo Substrate Densities

4.45 M.E. Azim, M.A. Wahab, A.A. Van dam, M.C.M. Beveridge, M.C.J. Verdegem, Scope for Periphyton-based Aquaculture: Effects of Artificial Substrates on Freshwater Pond Productivity and Water Quality

10.30	Karen Wiltshire, Algal Population Composition and Biomass Determined In Situ with Accessory Pigment Induced Fluorescence Methods
10.45	Susan Kilham, S.M. Taylor, Silicon and Nitrogen requirements of two closely related species, Stephanodiscus niagarae and Stephanodiscus yellowstonensis
11.00	Kristiina Vuorio, J. Sarvala, A. Ventela, M. Tarvainen, M. Meili, Stable Carbon and Nitrogen Isotopes in Lake Plankton/Seston: Variability among 13 Fractions, Two Seasons and Two Lakes
11.15	Lauri Arvola, A. Palomaki, S. Lehtinen, M. Jarvinen, Phytoplankton Community Structure And Biomass In Two Boreal Lakes In Relation To North Atlantic Oscillation And Local Weather Conditions
11.30	S. Wallace, T. Kobayashi, A. Church, The Application of Acoustic Doppler Current Profiler Backscatter Data to Asses the Temporal and Spatial Distribution of Plankton in an Australian Reservoir
11.45	Dieter Lessman, B. Nixdorf, Seasonal Succession of Phytoplankton in Acidic Mining Lakes
12.00	J. Koehler, K. Ockenfeld, K. Bahnwart, M. Bahnwart, Light-Adaptation of Phytoplankton in Lowland Rivers and Shallow Lakes
12.15	Mikaela Kruskopf, M.M. Du Pleiss, A.H.J. Pieterse, High Phytoplankton Acid and Alkaline Phosphatase Activity in the Vaal River (South Africa)

10.30	*Ram Kumar, Effects of Mesocyclopsthermocyclopoides* Predation on the Population Growth Patterns of Different Prey Species**
10.45	Tanya Rankin, Importance of Platypuses to the Structure of Macroinvertebrate Communities: Top-Down Predation Effects
11.00	Danielle Warfe, Can Habitat Complexity Initiate a Trophic Cascade?
11.15	Brendan McKie, Where Chironomids Dare: Do Predators Influence Where Larval Midges choose To Build Their Tubes?
11.30	J. Grey, Chironomid Contributions To Lake Food Webs: Questions Arising From Stable Isotope Analysis
11.45	*Elisabeth Gross, R. Kornijow, Investigation on Competitors and Predators of Herbivorous Aquatic Leipidoptera Larvae (Acentria* Ephemerella) on Submerged Macrophytes**
12.00	F.D. Hulot, M. Tolian, G. Lacroix, M. Loreau, Fish Load Effect on the Abundance of Trophic Groups of Freshwater Food Web: A Meta-Analysis
12.15	Kwang-Seuk Jeong, H-W. Kim, The Role of Zebra Mussel in the Microbial Food Web in the Lake-River Ecosystem (River Spree, Germany)
12.30	Kwang-Seuk Jeong, M-H. Jang, Distribution and Role in the Food Web of Introduced Fishes in Large River Systems of S.Korea

10.30	Luigi Flores, R. Barone, Limnology of A Small, Temporary Water Body: The Pond of Santa Rosalia (Sicily Italy)
10.45	Motta Marques, S. Giovannini, Allometry In Scirpus californicus In Response To Wetland Water Regime
11.00	*Motta Marques, S. Giovannini, Reproductive And Growth Strategies of Solanum glaucophyllum* In Response To Wetland Water Levels**
11.15	Kay Morris, G. Granf, The Influence of Aquatic Vegetation on Evaporative Water Loss from Wetlands
11.30	*Forrest Dierberg, T.A. DeBusk, K.C. Pietro, J.A. Potts, Biological Uptake vs Coprecipitation of Soluble Reactive Phosphorus by P-Enriched and P-Starved Najas guadalupensis* in Hard and Soft Waters**
11.45	Lisa Belyea, L. Lancaster, Inferring Long-term Dynamics Of Bog Pools Scaling Relationships And Spatial Patterns
12.00	Marth Rendon Lopez, C. Rosas-Monge, A. Chacon-Torres, Wetland deterioration by untreated sewage in a central Mexican plain
12.15	David Biesboer, Nitrogen Balance in Iron Springs Bog: A Coniferous Seepage Slope

Chair Leon Metzeling
10.30	Brian Whitton, M. Christmas, N.T.W. Ellwood, Use of Phosphatase Activities of Phototrophs for Routine Monitoring of Rivers and Streams
10.45	John Wright, R.J.M. Gunn, J.M. Winder, R. Wiggers, N.T. Kneebone, R.T. Clarke, The Impact of Drought Events in 1976 and 1997 on the Macroinvertebrate Fauna of a Chalk Stream
11.00	L. Metzeling, F. Wells, P. Newall, The Development And Testing Of Biological Objectives For The Protection Of Rivers And Streams
11.15	Klaus Koop, P. Scanes, Developing Environmental Objectives from Short, Focussed River Surveys
11.30	MarcusWishart, B.R. Davies, Considerations of Scale for Conserving River Basin integrity in Relation to Inter-Basin Water Transfers
11.45	Huong Hoang, F. Recknagel, Neural Network Predictions of Macroinvertebrate Assemblages for Stream Habitat Assessment in Queensland (Australia)
12.00	Ferdy De Moor, Shortcomings and Advantages of using Rapid Biological Assessment Techniques for Determining the Health of Rivers in South Africa
12.15	Mike Joy, R.G. Death, Assessing Stream Health Using a Reference Site Predictive Model of Fish Occurence

10.30	Andrew Boulton, S. De Pauw, P. Marmonier, Hyporheic Dynamics in a Degraded Rural Stream Carrying a 'Sand Slug'
10.45	Elisabeth Meyer, H.P. Escher, Input of Fine Particles Into Hyporheic Interstices of a Coarse Gravel Stream
11.00	Nicole Saenger, I. Seydell, Temporal and Spatial Variability of Permeability in a Gravely Riverbed
11.15	Cecile Claret, J.V. Ward, K. Tockner, Temperature Heterogeneity of Interstitial Water in Island - Associated Waterbodies of a Dynamic Flood Plain
11.30	D. Brochardt, J. Fischer, Oxygen Balances in the Hyporheic Zone of Eutrophic Rivers: A Dynamic Bottleneck for Ecological Functions
11.45	Ralph Ibisch, J. Fisher, D. Borchardt, Effects of Periphyton Biomass and Suspended Solids on River Bed Permeability
12.00	H. Duff, S.P. Hendricks, A.P. Jackman, F.J. Triska, Porewater Solute Chemistry and Sediment Microbial Respiration Associated with an Elodea Bed in a Sand and Gravel Bottom Stream in North Central Minnesota, USA
12.15	Nicol Saenger, Estimation of Flow Velocities within the Hyporheic Zone
12.30	Frank Kloep, I. Roske, Seasonal and Diurnal Nitrogen Dynamic in the Hyporheic Zone of the Upper Part of the River Elbe, Germany

10.30	Ann Schartau, A. Hobaek, Biodiversity In Urban Ponds And Small Lakes: Effects of size and pollution.
10.45	Karen Sutcliffe, J. Davis, S. Halse, Factors Affecting The Distribution Of Plecoptera In South-Western Australia
11.00	H. Blatterer, Some Conditions for the Distribution and Abundance of Ciliates (Protozoa) in Running Waters- Do we Really Find Every Species Everywhere?

10.30	Gideon Gal, J. Imberger, J.R. Romero, Understanding The Factors Contributing to The Rise in Water Temperature in A Stratified Lake with Long-Term Simulations
10.45	Brent Lofgren, A. Herche, K. Cronk, Contemporary and Possible Future Great Lakes Ice Cover
11.00	Gesa Weyhenmeyer, R. Adrian, U. Gaedke, D.M. Livingston, S. Maberly, Phytoplankton in European Lakes and a Sudden Change in Global Climatic Conditions - What Effect can be Seen
11.15	Brent Lofgren, F. Quinn, Assessment of Climate Change Effects on Laurentian Great Lakes Water Resources
11.30	Rita Adrian, D. Gerten, Persistency Of North Atlantic Oscillation Signals In Lakes Differing In Thermal Regime
11.45	Thorsten Blenckner, K. Pettersson, J. Padisak, Lake Plankton As Tracer To Discover Climate Signals A Study At Lake Erken, Sweden
12.00	William Chang, Chinese Great Lakes: Their Changes And Impacts
12.15	Kurt Pettersson, Seasonality Of Nutrients In Lake Erken - Effects Of Weather Conditions.
12.30	Brent Lofgren, A. Arbor, Coupled Atmosphere-Land-Lake Climate Simulation Using a Regional Model

1.30	L.C. Souza, C.W.C. Branco, F.A. Esteves, Rotifiers as Ecological Indicators in Three Coastal Lagoons in Rio de Janeiro, Brazil
1.45	Daryl Nielsen, J.D. Green, Are Successional Patterns In Billabongs The Same?
2.00	*Motta Marques, V. Becker, L. Cardoso, S. Giovannini, Spring To Autumn Biovolume Variation In Two Species Of Keratella* (Rotifera) In Response To Location In a Subtropical Freshwater Coastal Lagoon**
2.15	Vladimir Matveev, L. Matveev, Seasonal Dynamics Of Net Planktonic Rotifers In Two Subtropical Reservoirs In Relation To Potential Predators And Food Base.
2.30	Rafael Arocena, N. Prat, Design And Evaluation Of Benthic Mesocosms For Coastal Lagoons
2.45	Irene Karlsson, P. Karlsson, N. Strombeck, The Use of Image Analysis for Biomass Estimation of Gloeotrichia echinulata
3.00	Sandra Du Plessis, M.M. Kruskopf, A.J.H. Pieterse, Characterisation of Diel Fluctuations of Phosphatase Nitrate Reductase Activities in Vitro and in Situ in The Vaal River (South Africa)

1.30	Ernst Nusch, Comparative Long-term Investigations Into Westphalian Reservoirs
1.45	*Guntram Weithoff, Growth and Grazing under Extremely Acidic Conditions (pH 2.7) by Cephalodellahoodi* (Rotatoria)**
2.00	James Schindler, S.L. Stokes, K. Celik, Linville River Storm Flow Phosphorus Loading To Lake James, North Carolina, USA
2.15	Martin Schultze, B. Kuehn, B. Boehrer, M. Winkler, P. Herzsprung, Neutralization Of Acidic Mining Lakes By Filling With River Water

1.30	M.A. Brock, Seed Bank and Vegetation Responses to Timing, Duration and Frequency of Flooding in Temporary Wetlands: A Revegetation Tool?
2.00	Nick Fenner Temporal Variation in the Responses of Peatland Carbon Cycling to Temperature
2.15	Emma Gale, C.E. Oldham, Application of Predictive Numerical Modelling on a Shallow Wetland: Case Study- Lake Yangebup, WA
2.30	Pierre Horwitz, J.A. Davis, A.J. McComb, The Development and Application of Conceptual Models for Predicting Wetland Response
2.45	Bea Sommer, P. Horwitz, Using Carbon Cycling As A Surrogate For Wetland Function In Conceptual Modelling
3.00	Megan McGuire, J.A. Davis, D. Hamilton, B. Robson, Predicting Wetland Response to Nutrient Enrichment: Modelling Algal Blooms and Nuisance Midge Swarms
3.15	Barbara Robson, P.D. Hamilton, J.A. Davis, M.McGuire, Predicting Wetland Response To Climatic Variability: Modelling Cyanobacterial Succession And Vertical Migration

1.30		Oyvin Schnell, The Effects on the Chironomid (Diptera) Fauna of Rotenone Treatment of Alpine Brooks and Ponds at Hardangervidda, Norway, with a Comparison to Similar Adjacent and Untreated Habitats
1.45		G.G.Raddum , J.A. Gladson, Rotenone Treatment of a West Norwegian River, Effects on Drift of Invertebrates
2.00		laude Hansen, R. Psenner, The Evolution of Gis-Techniques in Combination to Limnological Monitoring Tasks
2.15		Mark Weatherhead, T. Snelder, B. Briggs, A. Suren, Physical Classification of Rivers as a Tool for Environmental Management
2.30		Gunther Friedrich, Classification and Assessment of River Morphology - A Contribution to the Assessment of River Integrity
2.45		Adrian Jakob, Long-Term Studies of Swiss Rivers
3.00		J.David Allan, R. Abell, Riparian Shade and Stream Temperatures in an Agricultural Catchment
3.15		Arne Jensen, B.O. Johnsen, Effect of Reduced River Discharge on Size of Adult Atlantic Salmon

1.30	Jane Hughes, M. Hilyer, Variation IN Mitochondrial DNA At Different Spatial Scales In A Baetid Mayfly
1.45	Peter Starkweather, Phylogeographic Structure Of Zooplankton Populations From Montane Lakes Of The North American Great Basin

1.30	Rhonda Butcher, P.S. Lake, R. Marchant, Variability In Aquatic Invertebrate And Plant Communities In Temporary And Permanent Wetlands
1.45	Adrian Pinder, S.A. Halse, R.J. Shiel, J.M. McRae, D.J. Cale, D.J. Pennifold, Diversity, Endemism And Conservation Of The Invertebrate Fauna Of Saline Wetlands In Southern Australia
2.00	Erica McAlister, C. Oanne, P. Shaw, The Effect of Macrophyte Planting on the Invertebrate Community on a Grazing Marsh
2.15	Seppo Hellsten, Aquatic Macrophytes as the Indicators of Water Level Regulation in Northern Finland
2.30	Micael Jonsson, B. Malmqvist, The Importance of Species Richness for Ecosystem Process Rates in Different Functions
2.45	Thomas Weisse, The Ecological Significance of Intraspecific Variation amoing Freshwater Ciliates
3.00	Marcus Wishart, J.A. Day, Endemism in the Freshwater Fauna of the South-Western Cape, South Africa
3.15	Helmut Hiellebrand, Diversity on unicellular aquatic organisms scaled to body size

1.30	*M. Barry, A. Tsitsalis, J. Tibby, B. Mason, P. Kershaw, H. Heijnis, Micro-Evolution of a Daphnia* Population in Relation to Anthropogenically-Disturbance: A Study Using Resurrection Ecology**
1.45	Irene Gregory-Eaves, J. Finney, M. Douglas, J. Sweetman, J. Smol, Hindcasting Pacific Salmon Abundances Using Paleolimnology
2.00	Suzanne Linnane, D.A. Murray, Hindcasting Recent Trends in Trophic Status of Lakes on the River Shannon, Ireland - Results from short Sediment Core Analyses
2.15	Uwe Selig, T. Hubener, A. Schwarz, T. Leipe, The Environmental History Investigations Of A Postglacial Dimictic Lake In North Germany
2.30	Koen Sabbe, Late Quaternary climate History Of Heart Lake And Pup Lagoon (Larsemann Hills, E-Antarctica)
2.45	Carl Sayer, A. Burgess, M. Jackson, Nutrients Or Fish? Inferring Long-Term Biological Changes And Causes Using The Palaeoecological Record Of A Shallow Lake
3.00	K Ruhland, J.P. Smol, Limnological Attributes of 77 Lakes in the Central Canadian Arctic Treeline Region

4.00	*Z Liu, Changes in Abundance of the Icefish Neosalanx pseudotaihuensis* Zhang (Salangidae) and the Impact on the Zooplankton Community of Xujiahe Reservoir, Central China**
4.15	*Winifried Lampert, Ecosystem Properties and Individual Fitness Optimization: Daphnia's* Response to Deep-Water Algal Maxima**
4.30	T. Kobayashi, A. Church, Effects of Macronutrients and Zooplankton Grazing on the Phytoplankton Community Biomass in an Australian Reservoir
4.45	Ragnar Lagergren, H. Lord, J.A.E. Stenson, Temperature Viscosity and Cyclomorphosis: An Old Hypothesis in a New Way
5.00	Sulmin Gumiri, T. Iwakuma, The Dynamics of Rotiferan Communities in Relation to Environmental Factors: Comparison Between Two Tropical Oxbow Lakes With Different Hydrological Conditions
5.15	C.W.C Branco, F.A. Esteves, B. Kozlowsky-Suzuki, T. Aguiaro, Environmental Factors and Predation Pressure Effects on Zooplankton Spatial and Temporal Variation in a Brazilian Coastal Lake
5.30	E. Everbecq, L. De Meester, V. Gosselain, L. Viroux,, J.P. Descy, Modelling the Impact of Benthic Filter-Feeders on Potamoplankton Composition and Biomass
5.45	Johan Grobbelaar, Variations in Toxicity and Growth Characteristics of Different Microcystis Species

4.00	Brian Sorrell, Methane Transport And Release By Submerged And Flowering Potamogeton crispus.
4.15	Pirkko Kortelainen, M. Rantakari, J. Huttunen, J. Alm, S. Juutinen, M. J. Silvola, P. Martikainen, Seasonal Depth Profiles of CH4, CO2 and N2o in Finnish Lakes Seasonal Depth Profiles of CH4, CO2 and N2o in Finnish Lakes
4.30	Rob Striegl, P. Kortelainen, J.P. Chanton, Carbon Dioxide Partial Pressure And C Content Of Northern And Alpine Lakes At Turnover
4.45	Yves Prairie, D.F. Bird, The Metabolic Balance In The Epilimnion Of Lakes.

4.00	Eren Turak, G. Hose, Large-Scale Patterns in the Integrity of Macroinvertebrate Assemblages from Rivers
4.15	Claire McKenny, Algae And Grazers In South East Queensland Streams
4.30	Jack Webster, Wood Accumulation in Nyack Creek, Montana, U.S.A.
4.45	Catherine Rommens, K, Beaugelin-Seiller, Strategy For Monitoring Radioactivity In Freshwater Ecosystems : Application to Model Validation
5.00	F. Wagner, A New Method For Quantitative Bottom Sediment Sampling
5.15	Sergey Komulaynen, Periphyton in Lake-River Systems- An Ecotone within an Ecotone

4.00	M. Bowman, D.W. Schindler, P.A. Chambers, Isolating Nutrient Limitation Thresholds to Restore the Ecological Integrity of Rocky Mountain
4.15	C. Fjorback, B. Kronvan, Interaction Between Aquatic Macrophytes and Stream Hydraulics: Implications of Different Weed Cutting Methods
4.30	Eugene Welch, D.A. Elswick, B.W. Mar, Prediction of Periphytic Algal Biomass Downstream from a Nutrient Pointsource
4.45	Micaelo Granero, Limnology of Mountain Rivers and Transport of P and N to an Eutriphicated Reservoir
5.00	Leon Barmuta, L. Emerson, P. Otahal, Sensitivity of a rapid biological assessment method to measurement errors

4.00	Jonathan Richardson, How similar are the Diatom Floras of Australia's Alkaline Monaro Lakes to those of Chemically Similar Lakes How similar are the Diatom Floras of Australia's Alkaline Monaro Lakes to those of Chemically Similar Lakes Elsewhere?
4.15	Odete Rocha, Hot Spots for Zooplankton Diversity in Sao Paulo State: Origin and Maintainance
4.30	Marc Schallenberg, C.Hall, R. Zehrer, C. Burns, Effects Of Salinity On Zooplankton Community Structure And Life History Parameters In A Tidal, Coastal Lake: Implications Of Sea Level Rise For Ecosystem Function
4.45	Sabine Floeder, J. Urabe, The influence of Fluctuating Irradiance intensities on Succession and Diversity of Natural Phytoplankton Communities from Lake Biwa, Japan
5.00	Ole Mathisen, N. Haubenstock, Trophic Ranking of the Biota in Lake Iliamna, Alaska
5.15	Smith R, Variation Of The Intergenic Region Of The Phycocyanin Gene: The Basis For A DGGE Based Cyanobacterial Typing Technique?

4.00	B.B. Jana The Wastewater Resources for Aquaculture: The Need for Sustainable Development
4.15	*Geraldine Matolla, Effect of Yeast Glucan On Immunostimulation of Cellura Non-specific Defences and Survival of Artic Charr (Salvelinus alpinus* L.)**
4.30	Keshavanath Perar, Performance of an Indigenous Carp, Tor Khudree in Fed and Non-Fed Tanks with Different Bamboo Substrate Densities
4.45	M.E. Azim, M.A. Wahab, A.A. Van dam, M.C.M. Beveridge, M.C.J. Verdegem, Scope for Periphyton-based Aquaculture: Effects of Artificial Substrates on Freshwater Pond Productivity and Water Quality