Ebook: Hypertrophic Ecosystems: S.I.L. Workshop on Hypertrophic Ecosystems held at Vaxjo, September 10–14, 1979

The idea of convening an international workshop on hypertrophic ecosystems originated during the 20th S.I.L. Congress in Copenhagen. A group of about 30 delegates met there in an informal gathering to discuss the specific problems of lakes which have reached a noxious stage of eutrophication. This ad hoc group realized its own specific identity within the limnological community and suggested the organization of a specialized future meeting on hypertrophic ecosystems. After two years of preparatory work, the workshop was fmally held in Vaxjo, Sweden, between September 10 and 14, 1979, on the premises of the University campus. The Institute of Limnology, University of Lund (Professor Sven Bjork), undertook the task of host and organizer. The City ofVaxjo and the University of Lund co-sponsored the event, which was held under the auspices and patronage of the Societas Internationalis Limnologiae. The objective of the workshop was to seek better understanding of highly-eutrophic, disturbed and unstable aquatic ecosystems (lakes, reservoirs and ponds developing noxious algal and bacterial blooms, fluctuating in their water quality on a daily and seasonal scale, producing gases, off-flavor and toxic substances, experiencing periodic anoxia and massive fish kills, etc.), Le., systems requiring corrective measures and new concepts for their solution beyond those generally accepted for 'normal' eutrophic systems.

---

---

Content:
Front Matter....Pages i-xv
Front Matter....Pages xvii-xvii
The Summer Limnology of Lake Waahi, New Zealand....Pages 1-12
Identification of Different Phosphorus Forms and their Role in the Eutrophication Process of Lake Balaton....Pages 13-22
Metalimnetic Gradient and Phosphorus Loss from the Epilimnion in Stratified Eutrophic Lakes....Pages 23-27
The Influence of Sediments on Changed Phosphorus Loading to Hypertrophic L. Glumso....Pages 29-36
The Cyanobacterium Microcystis Aeruginosa Kg. and the Nitrogen Cycle of the Hypertrophic Lake Brielle (The Netherlands)....Pages 37-43
Comparison of Hypertrophy on a Seasonal Scale in Dutch Inland Waters....Pages 45-55
Control of Undesirable Algae and Induction of Algal Successions in Hypertrophic Lake Ecosystems....Pages 57-65
Occurrence of Oscillatoria Agardhii and Some Related Species, a Survey....Pages 67-77
The Role of Microlayers in Controlling Phytoplankton Productivity....Pages 79-82
Short-Term Load-Response Relationships in Shallow, Polluted Lakes....Pages 83-93
The Importance of Trophic-Level Interactions to the Abundance and Species Composition of Algae in Lakes....Pages 95-103
Vegetation Changes in the Nutrient-Rich Shallow Lake Hjalstaviken....Pages 105-116
N2-Fixing Cyanobacteria: Why They Do Not Become Dominant in Dutch, Hypertrophic Lakes....Pages 117-121
Front Matter....Pages 123-130
Nitrate Overdose; Effects and Consequences....Pages 131-131
A Chemical Model to Describe Nutrient Dynamics in Lakes....Pages 133-137
Changes in Respiration and Anaerobic Nutrient Regeneration during the Transition Phase of Reservoir Development....Pages 139-149
Modelling Carbon and Phosphorus in a Small Hypertrophic North German Lake....Pages 151-158
An Algal Bloom Model as a Tool to Simulate Management Measures....Pages 159-169
Phosphorus Stability in a Hypereutrophic Lake....Pages 171-178
Front Matter....Pages 179-190
Structural and Functional Quantification in a Series of Hungarian Hypertrophic Shallow Lakes....Pages 131-131
Muddy Odour in Fish from Hypertrophic Waters....Pages 191-202
The Importance of Hydrologic Factors on the Relative Eutrophic Impacts of Point and Non-Point Pollution in a Reservoir....Pages 203-208
Environmental Constraints on Anabaena N2- And CO2-Fixation: Effects of Hyperoxia and Phosphate Depletion on Blooms and Chemostat Cultures....Pages 209-219
Toxicity Fluctuations and Factors Determining Them....Pages 221-229
Stability and Multiple Steady States of Hypereutrophic Ecosystems....Pages 231-234
Front Matter....Pages 235-247
On the Role of Soil in the Maintenance of Fish Ponds’ Fertility....Pages 249-249
Fish as a Factor Controlling Water Quality in Ponds....Pages 251-254
The Role of Fishery Management in Counteracting Eutrophication Processes....Pages 255-261
Fish Production in Some Hypertrophic Ecosystems in South India....Pages 263-269
Front Matter....Pages 271-277
Enrichment and Recovery of a Malaysian Reservoir....Pages 279-279
Lake Treatment with Hydrogen Peroxide....Pages 281-285
Characterization of the Recovery Processes in Hypertrophic Lakes in Terms of Actual (Lake Water)- and Potential (Algal Assay) Chlorophyll....Pages 287-294
Morphometrically Conditioned Eutrophy and Its Amelioration in Some British Columbia Lakes....Pages 295-303
Hartbeespoort Dam: A Case Study of a Hypertrophic, Warm, Monomictic Impoundment....Pages 305-315
Cascade Reservoirs as a Method for Improving the Trophic State Downstream....Pages 317-322
Front Matter....Pages 323-327
Concluding Remarks....Pages 329-329
Front Matter....Pages 331-333
The Effect of Pig Manure and Mineral Fertilization on a Eutrophic Lake Ecosystem....Pages 335-335
Hypertrophy in Slow Flowing Rivers....Pages 337-337
CO2-Uptake as a Measure of Bacterial Production....Pages 338-338
Front Matter....Pages 339-342
Response of Shallow Hypertrophic Lakes to Reduced Nutrient Loading....Pages 335-335
Fish as a Regulator of Structure and Function in Eutrophic Lake Ecosystems....Pages 343-343
Algenbekampfung Durch Zusatz Von Kalk- und Dolomithydrat....Pages 343-343
Possible Triggering Mechanisms for the Collapse of Aphanizomenon Flos-Aquae Blooms....Pages 343-344
Self-Purification and Respiration in Polysaprobic Area of Natural Flowing Waters Receiving Raw Domestic Sewage....Pages 344-344
Short-Circuit Metabolism in Highly Eutrophic Lakes—Relationship between Primary Production and Decomposition Rates....Pages 344-344
Heterotrophic Functions in the Freshwater Carbon Cycle....Pages 345-345
Effects of Temperature and Temperature-Nutrient Interactions on Phytoplankton Growth....Pages 345-345
Natural and Induced Sediment Rehabilitation in Hypertrophic Lakes....Pages 346-346
Aspects of Biological Competition between Stigeoclonium Tenue and Cladophora Glomerata, Two Filamentous Green Algae, Characteristic of Eutrophic Waters....Pages 346-346
Seasonal Succession and Standing Crop Determinations of the Epiphytic Algae in Two Hypertrophic Lakes....Pages 347-347
Nitrogen Transformations in Artificial Loaded Limnocorrals....Pages 347-347
Zur Quantitativen Bestimmung der Potentiellen Bioproduktion in Aquatischen Okosystemen Mittels Algentest....Pages 347-348
....Pages 348-348