Proceedings of the First International Workshop on Periphyton of Freshwater Ecosystems, held in Växjö, Sweden, 14-17 September, 1982

Inhalt

Opening speech.- Opening remarks.- I. Dynamics of Periphytic Communities.- 1. Dynamics of periphytic communities.- 2. Seasonal changes in the taxonomic composition of epiphytic algal communities in Lake Wingra, Wisconsin, U.S.A..- 3. A comparison of the periphytic communities in two sections of the Danube River.- 4. Phytosociological associations of algal periphyton.- 5. Development and dynamics of floating clusters of filamentous algae.- 6. A comparison of the periphyton of Nuphar lutea and Nymphaea alba. The distribution of diatoms on the undersides of floating leaves.- 7. Structural investigations of periphytic protozoan communities in three layers of the Danube River. I. The question of stratification.- 8. Structural investigations of periphytic protozoan communities in three layers of the Danube River. II. The course of colonization.- 9. Seasonal changes in diatom-structure of periphyton from two localities in Lake Maarsseveen: community indices.- II. Parameters Influencing Growth of Periphyton.- 10. Physical and chemical parameters regulating growth of periphytic communities.- 11. Photosynthesis-irradiance relationships of epilithic algae measured in the laboratory and in situ.- 12. Selective light attenuation by the periphyton complex.- 13. Influence of current velocity on periphyton distribution.- 14. Nitrogen fixation in periphyton of oligotrophic Lake Tahoe.- 15. Direct examination of growing filaments to determine phosphate growth kinetics in Cladophora glomerata (L.) Kütz. and Stigeoclonium tenue (Agardh) Kütz.- 16. Development of nuisance periphytic algae in laboratory streams in relation to enrichment and velocity.- 17. Factors regulating the spatial and temporal distribution of Cladophora and Ulothrix in the Laurentian Great Lakes.- 18. Uptake and accumulation of some nutrient elements in relation to the biomass of an epilithic community.- 19. Dynamics of epiphytic communities on Equisetum fluviatile L.: Response to short-term variation in environmental conditions.- III. Productivity and Utilization of Periphyton.- 20. Littoral zone production of oligotrophic lakes: The contributions of phytoplankton and periphyton.- 21. Biomass and production of periphyton attached to dead reed stems in Lake Maarsseveen.- 22. Seasonal changes in organic matter and dark oxygen uptake of epiphyton and epipelon in relation to seston deposition in Lake Vechten (The Netherlands).- 23. Studies on periphyton community dynamics of acidic streams using track autoradiography.- 24. A geomorphic approach for examining the role of periphyton in large watersheds.- 25. Adaptations to benthic freshwater herbivory.- IV. Periphyton/Substrata Interactions.- 26. Attached algal-substrata interactions: fact or myth, and when and how?.- 27. An investigation of macrophyte, epiphyte and grazer interactions.- 28. Potential effect of Myriophyllum spicatum on the primary production of phytoplankton.- 29. Exchange of phosphorus between water, macrophytes and epiphytic periphyton in the littoral zone of Mikolajskie Lake, Poland.- V. Methodology.- 30. Methodology: the key to understanding periphyton.- 31. A light and dark trough methodology for measuring rates of lotic periphyton settlement and net growth. An evaluation through intersite comparison.- 32. The application of a nuclear track autoradiographic technique to the study of periphyton photosynthesis.- 33. A method for measuring the dehydrogenase activity of river periphyton.- 34. Artificial substrata for reducing periphytic variability on replicated samples.- 35. A rapid extraction technique for photosynthetic pigments and ATP from periphyton communities.- 36. Periphyton pigment analyses using paper chromatography.- VI. Periphyton and Pollution.- 37. The utilization of periphyton in waterworks pre-treatment for nutrient removal from enriched influents.- 38. Nutrient removal by epiphytic microorganisms of Phragmites communis.- 39. Effects of agricultural wastewater on benthic algae in ditches in the Netherlands.- 40. Attached and suspended bacterial populations in shallow running waters under different levels of pollution.- 41. A study of the periphyton of Lake Saimaa, polluted by waste waters of the pulp industry. A method for water pollution control analysis.- Concluding remarks.- Recommendations for future research on periphyton.