Hypertrophic Ecosystems

waters.- The importance of hydrologic factors on the relative eutrophic impacts of point and non-point pollution in a reservoir.- Environmental constraints on Anabaena N2- and CO2-fixation: effects of hyperoxia and phosphate depletion on blooms and chemostat cultures.- Toxicity fluctuations and factors determining them.- Stability and multiple steady states of hypereutrophic ecosystems.- Session 3: Foodchain properties, productivity and utilization of hypertrophic ecosystems.- On the role of soil in the maintenance of fish ponds' fertility.- Fish as a factor controlling water quality in ponds.- The role of fishery management in counteracting eutrophication.- Fish production in some hypertrophic ecosystems in South India.- Session 4: Rehabilitation.- Enrichment and recovery of a Malaysian reservoir.- Lake treatment with hydrogen peroxide.- Characterization of the recovery processes in hypertrophic lakes in terms of actual (lake water) and potential (algal assay) chloropically.- Morphometrically conditioned eutrophy and its amelioration in some British Columbia lakes.- Hartbeespoort Dam - a case study of a hypertrophic, warm, monomictic impoundment.- Cascade reservoirs as a method for improving the trophic state downstream.- Concluding Remarks.- Summaries and Abstracts.- The effect of pig manure and mineral fertilization on a eutrophic lake ecosystem.- Hypertrophy in slow flowing rivers.- CO2-uptake as a measure of bacterial production.- Response of shallow hypertrophic lakes to reduced nutrient loading.- Fish as a regulator of structure and function in eutrophic lake ecosystems.- Algenbekämpfung durch Zusatz von Kalk und Dolomithydrat.- Possible triggering mechanisms for the collapse of Aphanizomenon-flos-aquae blooms.- Self-purification and respiration in polysaprobic area of natural flowing waters receiving raw domestic sewage.- Short-circuit metabolism in highly eutrophic lakes - relationship between primary production and decomposition rates.- Heterotrophic functions in the freshwater carbon cycle.- Effects of temperature and temperature-nutrient interactions on phytoplankton growth.- Natural and induced sediment rehabilitation in hypertrophic lakes.- Aspects of biological competition between Stigeoclonium tenue and Cladophora glomerata, two filamentous green algae, characteristic of eutrophic waters.- Seasonal succession and standing crop determinations of the epiphytic algae in two hypertrophic lakes.- Nitrogen transformations in artificial loaded limnocorrals.- Zur quantitativen Bestimmung der potentielle Bioproduktion in aquatischen Ökosystemen mittels Algentest.