Eutrophication in planktonic ecosystems : food web dynamics and elemental cycling ; proceedings of the Fourth International PELAG Symposium, held in Helsinki, Finland, 26-30 August 1996

The PELAG 1996 Symposium Proceedings provides the reader with the latest advances in the study of planktonic cycling of matter and energy, placing a strong emphasis on the effects of eutrophication on these processes. This book covers a wide range of topics in the field, including: Nutrient limitation of phytoplankton growth Nutrient cycles in the planktonic food web DOM sources, composition, and uptake Resource limitation vs. shaping of the food web by grazing Spatio-temporal variability: coupling of physical and biological processes Processes controlling sinking losses from the pelagic system Planktonic food web modelling . The book should be of interest to everybody involved in planktonic ecosystem research, from the advanced student to the distinguished scientist. This volume brings to the reader the expertise of internationally renowned authors on the main issues of today's ecological plankton research. Front Matter....Pages i-viii Interactions of top-down and bottom-up control in planktonic nitrogen cycling....Pages 1-12 Population regulation and role of mesozooplankton in shaping marine pelagic food webs....Pages 13-27 Retention versus export food chains: processes controlling sinking loss from marine pelagic systems....Pages 29-57 A theoretical approach to structuring mechanisms in the pelagic food web....Pages 59-72 30 years’ eutrophication in shallow brackish waters — lessons to be learned....Pages 73-79 Relations between planktivorous fish abundance, zooplankton and phytoplankton in three lakes of differing productivity....Pages 81-95 Planktonic food web in marine mesocosms in the Eastern Mediterranean: bottom-up or top-down regulation?....Pages 97-105 Coupling of autotrophic and heterotrophic processes in a Baltic estuarine mixing gradient (Pomeranian Bight)....Pages 107-115 Variability of nutrient limitation in the Archipelago Sea, SW Finland....Pages 117-126 Effects of environmental factors on the phytoplankton community in the Gulf of Finland — unattended high frequency measurements and multivariate analyses....Pages 127-139 On the production, elemental composition (C, N, P) and distribution of photosynthetic organic matter in the Southern Black Sea....Pages 141-156 Elemental composition of seston and nutrient dynamics in the Sea of Marmara....Pages 157-167 Impact of increased river discharge on the phytoplankton community in the outer Oslofjord, Norway....Pages 169-177 Vertical migration of autotrophic micro-organisms during a vernal bloom at the coastal Baltic Sea — coexistence through niche separation....Pages 179-189 Group-specific phytoplankton biomass/dissolved carbohydrate relationships in the Gulf of Trieste (Northern Adriatic)....Pages 191-205 The use of spectral fluorescence methods to detect changes in the phytoplankton community....Pages 207-217 The budgets of nitrogen and phosphorus in shallow eutrophic Lake Võrtsjärv (Estonia)....Pages 219-227 Vertical and seasonal distributions of micro-organisms, zooplankton and phytoplankton in a eutrophic lake....Pages 229-240 Biochemical composition of particulate organic matter and bacterial dynamics at the sediment—water interface in a Mediterranean seagrass system....Pages 241-251 Development of microbial community during Skeletonema costatum detritus degradation....Pages 253-260 Nutrient composition, microbial biomass and activity at the air-water interface of small boreal forest lakes....Pages 261-270 Seasonal and spatial distribution of bacterial production and biomass along a salinity gradient (Northern Adriatic Sea)....Pages 271-282 Incorporation of spatial structure into the analysis of relationships between environment and marine microbiological parameters....Pages 283-288 Biomass and feeding activity of phagotrophic mixotrophs in the northwestern Black Sea during the summer 1995....Pages 289-301 Spatial structure and ecological efficiency in the summer zooplankton of a glacial lake....Pages 303-307 Nitrogen, phosphorus and Daphnia grazing in controlling phytoplankton biomass and composition — an experimental study....Pages 309-321 In situ grazing pressure and diel vertical migration of female Calanus euxinus in the Black Sea....Pages 323-332 Zooplankton-phytoplankton interactions: a possible explanation of the seasonal succession in the Kuršiu Marios lagoon....Pages 333-339 Closing address: perspectives on basic and applied, freshwater and marine pelagic research....Pages 341-344

The PELAG 1996 Symposium Proceedings provides the reader with the latest advances in the study of planktonic cycling of matter and energy, placing a strong emphasis on the effects of eutrophication on these processes. This book covers a wide range of topics in the field, including: Nutrient limitation of phytoplankton growth Nutrient cycles in the planktonic food web DOM sources, composition, and uptake Resource limitation vs. shaping of the food web by grazing Spatio-temporal variability: coupling of physical and biological processes Processes controlling sinking losses from the pelagic system Planktonic food web modelling .
The book should be of interest to everybody involved in planktonic ecosystem research, from the advanced student to the distinguished scientist. This volume brings to the reader the expertise of internationally renowned authors on the main issues of today's ecological plankton research.

Proceedings of the International PELAG Symposium, August 26-30, 1996 in Helsinki, Finland