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Preface | |
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The Subject and the Approach | |
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Introduction | |
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Vulnerability of coastal waters and the need for management | |
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The high productivity of coastal waters | |
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The high productivity of phytoplankton | |
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The productivity of marine macrophytes | |
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Secondary production in coastal waters | |
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The ecosystem approach | |
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Techniques of ecosystem research | |
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Budgets and compartmental flow diagrams | |
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Estimating mean flows | |
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Process models and dynamic simulation models | |
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Goals of ecosystem management | |
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Control of exploitation of stocks | |
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Maintenance of adequate but not excessive primary production | |
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Maintenance of habitat | |
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Maintenance of species diversity | |
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Outlines of ecosystem chapters | |
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Estuarine Ecosystems and Their Components | |
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Estuaries: Their Physical Properties in Relation to Biological Functioning | |
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Introduction | |
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Geological origins of estuarine basins | |
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Physical structure and functioning of estuaries | |
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Freshwater runoff | |
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Tidal flushing | |
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Interactions between buoyancy and mixing | |
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The Coriolis effect | |
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Influence of wind | |
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Physical-biological interactions in estuarine ecosystems | |
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Interactions with flowering plants | |
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Interactions with seaweeds | |
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Interactions with phytoplankton | |
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Interactions with zooplankton | |
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Interactions with fish and actively swimming invertebrates | |
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The biological consequences of changing freshwater runoff | |
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Correlations with natural variability | |
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Correlations with man-made changes | |
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Summary of the science | |
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Implications for management | |
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Salt Marshes | |
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Introduction | |
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The primary producers | |
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The magnitude of primary production | |
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Factors influencing variability of primary production | |
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Contributions by algae | |
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Nutrient fluxes in the system | |
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Fluxes of nitrogen | |
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Fluxes of sulfur | |
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The consumers | |
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Consumption of Spartina by herbivores | |
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Decomposition and utilization by detritivores | |
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Topics of special interest: salt marshes and adjacent watersheds | |
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Summary of the science | |
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Implications for management | |
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Salt-marsh management: a Florida case history | |
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Salt marshes, mangroves, and oil spills | |
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Mangroves | |
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Introduction | |
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The primary producers | |
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The magnitude of primary production | |
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Nutrient fluxes in the system | |
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The consumers: invertebrates and fish in mangrove forests | |
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Study of a mangrove system in Queensland, Australia | |
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Topics of special interest: importance of mangroves for coastal fisheries | |
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Summary of the science | |
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Implications for management | |
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The exploitation of mangroves | |
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Concerns about global warming | |
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Mangroves and sea-level rise | |
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Restoration of mangroves in northwest India | |
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Seagrass Systems | |
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Introduction | |
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The primary producers | |
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The magnitude of seagrass productivity | |
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Techniques for measurement | |
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The effect of water movement | |
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The contribution by epiphytes and macroalgae | |
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Nutrient fluxes in the system | |
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Consumers of seagrass production | |
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Grazers | |
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Browsers on epiphytes | |
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Detritivores | |
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Carnivores | |
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Topics of special interest: deterioration of seagrass systems | |
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Decline associated with disease | |
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Declines associated with disturbance and light attenuation | |
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Summary of the science | |
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Implications for management | |
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Value of seagrass beds | |
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Threats to seagrass beds | |
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Restoration of seagrass beds | |
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Restoration of seagrass beds | |
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The Fate of Macrophyte Detritus | |
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Introduction | |
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The pathways of detritus processing | |
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Colonization of detritus by microorganisms | |
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Consumption of morphous detritus by animals | |
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Digestion of cellulose by marine animals | |
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Microorganisms as intermediaries | |
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Experiments with Capitella | |
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The importance of dissolved organic matter | |
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The overall fate of macrophyte detritus | |
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Results of stable isotope studies | |
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Summary of the science | |
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Implications for management | |
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Estuarine Planktonic Systems | |
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Introduction | |
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The primary producers | |
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How phytoplankton cells obtain their nutrients | |
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The magnitude and variability of primary production | |
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Control by seasonal changes in solar radiation | |
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Estuarine factors modifying the basic pattern of phytoplankton production | |
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Observed magnitude and seasonality of phytoplankton production | |
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Nutrient fluxes in estuaries | |
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Nutrient sources in relatively unpolluted environments | |
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Nutrient sources in heavily polluted environments | |
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The consumers: planktonic secondary production in estuaries | |
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Zooplankton communities | |
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Vertical migration of zooplankton in estuaries | |
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Nanoplankton, picoplankton, and the microbial loop | |
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The meroplankton: estuaries as planktonic nurseries | |
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Topics of special interest: toxic and other nuisance algal blooms | |
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Summary of the science | |
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Implications for management | |
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Eutrophication | |
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Introduction of alien species | |
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The cleanup of the estuary of the River Thames | |
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Estuarine Benthic Systems | |
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Introduction | |
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The primary producers and the sedimentation of organic carbon | |
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Benthic microalgae | |
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Sedimentation of organic matter to the benthos | |
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The magnitude of organic input to the benthos | |
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Nutrient fluxes: processing of organic carbon and regeneration of nutrients | |
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Macrobenthic invertebrates and bioturbation | |
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Processing of organic carbon in the aerobic layer | |
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Organisms processing organic carbon in the anaerobic layer | |
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Relative importance of aerobic and anaerobic pathways | |
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Sum of aerobic and anaerobic processes | |
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The importance of denitrification | |
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Benthic secondary production | |
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Biomass and production of single-species populations of detritivores | |
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Bivalve reefs as distinct ecosystems | |
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Biomass and production of benthic predators | |
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Topics of special interest: community structure and the role of disturbance | |
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Summary of the science | |
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Implications for management | |
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Estuarine benthic contamination and the fate of beluga whales | |
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Nekton: Fish and Swimming Invertebrates | |
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Introduction | |
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Common estuarine nekton | |
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Fish in the estuarine ecosystem | |
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Estuarine residents | |
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Saltwater spawners | |
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Estuarine spawners | |
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Anadromous and catadromous species | |
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Commercial fish stocks in estuaries | |
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History of the concept of estuarine dependence | |
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Estuarine influences on fish production | |
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The influence of primary production on fish and shellfish production | |
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The influence of river runoff on fish and shellfish production | |
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Global magnitude of estuarine fisheries | |
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Summary of the science | |
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Implications for management | |
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Protecting the freshwater inflow | |
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Protecting the wetland vegetation | |
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Protecting the tidal regime | |
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The Integrated Functioning of Estuaries | |
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Introduction | |
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Barataria Bay: a system with large areas of marshes | |
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Narragansett Bay: a system dominated by phytoplankton | |
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North Inlet Estuary: long-term studies of a pristine system | |
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The upper Bay of Fundy and its relation to a proposed tidal power dam | |
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The Baltic Sea: consequences of nutrient enrichment | |
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The Westerschelde: a grossly polluted estuary | |
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Summary of the science | |
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Implications for management | |
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Chesapeake Bay: a model for estuarine management? | |
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The lagoon of Venice: conflicts between uses | |
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Coastal Systems: Rocky Shores and Beaches | |
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Intertidal Rocky Shores | |
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Introduction | |
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The primary producers | |
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Seaweeds in general | |
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Primary producers of the intertidal zone | |
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The magnitude of primary production | |
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Nutrient fluxes in the system | |
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The consumers | |
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Topics of special interest: community dynamics on rocky shores | |
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The relative importance of predation and competition | |
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The importance of recruitment | |
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The importance of disturbance | |
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Modification of predator-prey interactions by chemical and structural defenses | |
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Summary of the science | |
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Implications for management | |
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Harvesting of rockweeds: the need for careful management | |
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Subtidal Rocky Shores | |
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Introduction | |
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The primary producers | |
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Laminaria | |
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Ecklonia | |
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Macrocystis | |
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The magnitude and fate of primary production | |
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Productivity of Laminaria | |
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Productivity of Ecklonia | |
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Productivity of Macrocystis | |
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Production and fate of dissolved organic matter | |
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Factors influencing kelp productivity | |
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Nutrient fluxes in the system | |
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Nutrient relationships of Laminaria | |
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Nutrient relationships of Macrocystis | |
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The consumers | |
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Sea urchins as herbivores | |
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Topics of special interest: what controls the abundance of sea urchins and the destruction of kelp beds? | |
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Sea otters as controlling predators | |
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Lobsters as controlling predators | |
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Fish as controlling predators | |
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Disease as a factor controlling sea urchin populations | |
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The physical environment as a factor controlling sea urchin populations | |
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Kelp-urchin interactions | |
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Summary of the science | |
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Implications for management | |
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What is the potential for harvesting kelp? | |
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Sea urchins: a threat or a harvestable resource? | |
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Are lobster stocks dependent on kelp beds? | |
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Could we farm kelp and use the biomass as an energy source? | |
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Sandy Beaches | |
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Introduction | |
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Variation in beach type | |
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Water filtration by the sand | |
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The primary producers | |
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The magnitude of primary production | |
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Nutrient cycling | |
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Dissipative beaches with surf zones | |
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Beaches with stranded seaweed or seagrass | |
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The consumers | |
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Fauna of the surf zone | |
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Consumer communities of intertidal sandy beaches | |
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The special case of shores with accumulations of macrophytes | |
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Topics of special interest: an analysis of ecosystem properties of a high-energy beach/surf zone | |
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Structure of the system | |
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Modeling and analysis | |
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Summary of the science | |
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Implications for management | |
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The surf zone | |
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Sand dunes | |
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Sandy beaches, tourism, and turtles | |
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Construction of an airfield runway destroys tourist beach | |
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Shelf Ecosystems | |
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Planktonic systems on the Continental Shelves | |
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Introduction | |
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The physical control of phytoplankton production on the shelves | |
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Tidal mixing | |
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Tidal or shelf-sea fronts | |
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Internal waves and shelf-break fronts | |
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Wind-driven coastal upwelling | |
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Stratified water with minimal vertical mixing | |
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The magnitude of primary production | |
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Nutrient fluxes on the shelves | |
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The consumers | |
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The microzooplankton, or net zooplankton | |
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The microbial food web: nanoplankton and picoplankton | |
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The magnitude of planktonic secondary production on the shelves | |
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Hard-bottom benthic communities | |
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Topics of special interest: results obtained with new zooplankton sampling methods | |
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The need for better sampling methods | |
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A continuous plankton recorder | |
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A multiple-net sampler | |
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Acoustic techniques | |
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Optical techniques | |
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Summary of the science | |
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Implications for management | |
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Coastal Eutrophication | |
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The exploitation of plankton | |
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Death by suffocation in the Gulf of Mexico | |
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The dangers of exploiting krill and other forage species | |
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Coastal Upwelling Ecosystems | |
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Introduction | |
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The primary producers | |
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The magnitude of primary production | |
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The Peruvian upwelling system | |
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The northwest African upwelling system | |
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The Somalia upwelling system | |
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Nutrient fluxes | |
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New nutrients | |
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Regenerated nutrients | |
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Secondary production in upwelling systems | |
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Zooplankton | |
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Fish | |
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Factors influencing year-class abundance of clupeids | |
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Topics of special interest: environmental factors influencing changes in fish productivity | |
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In the Peruvian system | |
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In the North Pacific | |
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In the Benguela upwelling system | |
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Summary of the science | |
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Implications for management | |
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Coral Reefs | |
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Introduction | |
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Types of reef and their geological history | |
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Global distribution of coral reefs | |
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The functional zones of a coral reef | |
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The primary producers | |
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Reef-building corals | |
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Coralline algae | |
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Noncoralline algae | |
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Phytoplankton | |
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The calcification process | |
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The magnitude of primary production | |
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Rate of photosynthesis by corals | |
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Rate of photosynthesis of algae | |
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Primary production of the total reef system | |
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Nutrient fluxes in the system | |
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Fluxes of nitrogen | |
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The consumers | |
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The herbivores | |
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The carnivores | |
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Consumers causing reef destruction: the bioeroders | |
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Topics of special interest: the dynamics of recruitment | |
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Reproduction in corals | |
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Coral recruitment on the Great Barrier Reef | |
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The dynamics of recruitment of reef fishes | |
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Summary of the science | |
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Implications for management | |
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Human impacts on coral reefs | |
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Interactions of human disturbances with natural disturbances | |
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A framework for management activity | |
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Crown-of-thorns starfish wreak havoc on coral reefs | |
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Cumulative effects of natural disturbance and human impacts on a Caribbean coral reef | |
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Fish Production on the Continental Shelves | |
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Introduction | |
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The global picture | |
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Fluctuations in the various species groups | |
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The dynamics of fish stocks | |
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Life histories and migrations | |
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The retention of larvae in tidally mixed areas | |
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The special role of shallow banks | |
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Factors influencing survival of larvae and juveniles | |
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Too few or too many spawning fish | |
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Predation | |
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Matches or mismatches in the timing of biological events | |
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Turbulence and the aggregation of food | |
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Turbulence and the ability of larvae to catch food | |
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Large-scale correlations between physical factors and fish abundance | |
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Climate changes and exceptional year classes on the Pacific coast of North America | |
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Coherent changes in the landings of salmon in the United States, Canada, the former Soviet Union, and Japan | |
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Coherent changes in catches of sardines in three widely separated Pacific stocks | |
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Synchronous variation in recruitment in the Northwest Atlantic | |
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Summary of the science | |
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The management of fish stocks | |
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The scope of the problem | |
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The proposed courses of action | |
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Problems of the fishery on Georges Bank, United States | |
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Synthesis | |
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The Whole-Ecosystem Approach to Managing Coastal Waters: Questions for the Future | |
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Introduction | |
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Recognition of Large Marine Ecosystems | |
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Energy flow and mass balance models of coastal ecosystems | |
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Dynamic simulations of coastal ecosystems | |
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Ecosystem models based on biomass size spectra | |
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Questions of scale and hierarchy in coastal ecosystems | |
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Scale | |
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Hierarchies | |
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Impacts of human action: top-down and bottom-up effects | |
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Top-down influences: the effect of fishing on fish community structure | |
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Top-down influences: the effect of fishing gear on benthic communities | |
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Summary of the science | |
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Implications for management | |
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Pollution | |
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Habitat destruction | |
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Overexploitation | |
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Accelerated sea-level rise | |
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Other consequences of global change | |
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The future of the coastal zone | |
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The World Bank promotes integrated coastal zone management | |
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References | |
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Suggestions for Further Reading: Recent Developments and More Advanced Topics | |
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Index | |