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  • 1
    Keywords: Eutrophication. ; Electronic books.
    Description / Table of Contents: Highlighting its definitions and causes, this review synthesizes the most recent scientific results in relation to specific eutrophication issues. Other topics discussed include nutrient loads, cycling and limitation, reference conditions and trend reversal.
    Type of Medium: Online Resource
    Pages: 1 online resource (271 pages)
    Edition: 1st ed.
    ISBN: 9789048133857
    Series Statement: Developments in Hydrobiology Series ; v.207
    DDC: 577.69915
    Language: English
    Note: Intro -- Title Page -- Copyright Page -- Table of Contents -- Eutrophication in coastal marine ecosystems: towards better understanding and management strategies -- About the symposium -- Eutrophication research and management-the Danish connection -- About this Special Issue -- References -- Eutrophication and the macroscope -- Eutrophication -- The eutrophication generation -- Coastal marine oligotrophication? -- The intersection of two great inquiries in marine ecology -- The agricultural model -- Of ducks and dead zones-why didn't we see it coming? -- The macroscope -- Phenology and eutrophication -- References -- Ecosystem thresholds with hypoxia -- Introduction -- Biogeochemical consequences -- Thresholds of ecosystem hypoxia -- Impact of global warming -- Future perspectives -- References -- Nutrient enrichment and fisheries exploitation: interactive effects on estuarine living resources and their management -- Introduction -- Interactions between nutrient enrichment and fishing effects -- Nutrient enrichment effects on fish and fisheries -- Production and mortality -- Sustainable fisheries landings and fisheries practices -- Restoring and managing fishes in estuaries and semi-enclosed seas -- New tools and approaches -- Conclusions -- References -- Assessment of the eutrophication status of transitional, coastal and marine waters within OSPAR -- Introduction -- Interaction of eutrophication processes -- Assessments and measures -- Towards a pan-European assessment strategy -- References -- Can the EU agri-environmental aid program be extended into the coastal zone to combat eutrophication? -- Introduction -- Mussel farming as an environmental measure-the Swedish experience -- Long-line farming -- First example of nutrient trading -- The EU agro-environmental aid program and mussel farming -- The market for mussels -- Food. , Feed and fertilizer -- Conclusions -- References -- Eutrophication and agriculture in Denmark: 20 years of experience and prospects for the future -- Introduction -- Danish agriculture and environmental policies -- Results from efforts in agriculture: lower nitrogen leaching-mission completed -- Benefits have not been without costs -- Future management of aquatic habitats-an urgent need for re-thinking -- References -- Odense Pilot River Basin: implementation of the EU Water Framework Directive in a shallow eutrophic estuary (Odense Fjord, Denmark) and its upstream catchment -- Introduction -- Odense River Basin -- Characteristics and environmental status of Odense Fjord -- Pressures and impact analysis -- Odense Fjord-reference conditions, classification and assessment -- Reference conditions -- Historical data -- Empirical modelling -- Numerical modelling -- Classification and assessment -- Odense Fjord-risk analysis -- Odense River Basin-programme of measures -- Cost-effectiveness analysis -- Scenarios -- A Baltic perspective -- Conclusions and recommendations -- Odense Pilot River Basin -- Water managers' challenge -- Legislation -- Resources -- Monitoring -- New technologies -- Climate change -- References -- Relationship between eutrophication reference conditions and boundary settings considering OSPAR recommendations and the Water Framework Directive-examples from the German Bight -- Introduction -- Boundary settings -- Differentiating boundary settings along salinity gradients -- Boundary settings and data variability -- Conclusions and perspectives -- References -- Modelling the distribution and growth of 'problem' green seaweed in the Medway estuary, UK -- Introduction -- Methods -- Study region -- Approach -- Hydrodynamics and nutrient transport -- Suitability index method -- Macroalgal growth model -- Vegetation cover -- Results. , Application of the suitability index method -- Application of the macroalgal model -- Discussion -- Summary and conclusions -- References -- Short-term effect of oxic to anoxic transition on benthic microbial activity and solute fluxes in organic-rich phytotreatment ponds -- Introduction -- Materials and methods -- Study area -- Water and sediment sampling, core maintenance, and incubation -- Sediment characterization -- Enzymatic activity -- Heterotrophic bacterial production -- Total prokaryotic abundance (TPA) and actively respiring cells (ARC) -- Analyses of solutes and particulate carbon, nitrogen, and phosphorus -- Statistical analyses -- Results -- General features of effluents and surface sediments -- Short-term effect of oxic to anoxic transition on the microbial activity -- Short-term effect of oxic to anoxic transition on the solute fluxes -- Discussion -- Conclusion -- References -- Denitrification efficiency for defining critical loads of carbon in shallow coastal ecosystems -- Introduction -- Materials and methods -- Results -- Discussion -- Exceptions to the rule -- Spatial and temporal variability within an individual system -- Critical carbon loading rates -- References -- Responses of benthic-pelagic coupling to climate change in a temperate estuary -- Introduction -- Materials and methods -- Site description -- Analytical methods -- Data analysis -- Results -- Oxygen uptake and nutrient fluxes -- Denitrification rates -- Discussion -- Ecological responses to climate change in narragansett Bay -- Implications for management -- References -- Potential phytoplankton indicator species for monitoring Baltic coastal waters in the summer period -- Introduction -- Materials and methods -- Phytoplankton analysis -- Data analysis -- Results -- Hydrological and nutrient conditions -- Dynamics of phytoplankton. , Relationships between abiotic and biotic variables -- Temporal variation in phytoplankton communities -- Discussion -- Conclusions -- References -- Using bio-optics to investigate the extent of coastal waters: A Swedish case study -- Introduction -- Area description -- The coastal zone and bio-optical properties -- Distribution of optical variables perpendicular to the coast -- Materials and methods -- Results -- Water samples -- Relationships among the variables -- Multiple regression analysis -- Synthesis-a coastal attenuation model -- Discussion -- Observations -- Correlations between optical components -- Model fit -- Conclusion -- References -- Identification of the coastal zone of the central and eastern Gulf of Finland by numerical modeling, measurements, and remote sensing of chlorophyll a -- Introduction -- Materials and methods -- Numerical model -- Measurement data -- Satellite imagery -- Results -- Discussion -- Conclusion -- References -- Interactions of light and organic matter under contrasting resource simulated environments: the importance of clonal traits in the seagrass Zostera noltii -- Introduction -- Materials and methods -- Sampling site -- Experimental design -- Plant growth -- Photosynthetic performance -- Elemental composition -- Statistical analysis -- Results -- Abiotic variables -- Plant dynamic parameters -- Photosynthetic performance (fluorescence) -- Tissue elemental composition -- Discussion -- Conclusion -- References -- Long-term modeling of large-scale nutrient cycles in the entire Baltic Sea -- Introduction -- Materials and methods -- Variables and interactions -- System of equations -- Parameterizations -- Driving forces -- Data for comparison -- Results -- Discussion -- Hindcast of the recent nutrient dynamics in the Baltic Sea -- A scenario simulation -- Conclusion -- References. , Response of eutrophication in the eastern Gulf of Finland to nutrient load reduction scenarios -- Introduction -- Materials and methods -- Results -- The reference run and model validation -- Nutrient reduction scenarios -- Discussion -- Conclusion -- References -- Modeling eutrophication and oligotrophication of shallow-water marine systems: the importance of sediments under stratified and well-mixed conditions -- Introduction -- Materials and methods -- Model description -- Water-column turbulence and sinking -- Pelagic biogeochemical model -- Sediment biogeochemical model -- Sediment parameters -- Submodel coupling -- Solving the coupled model -- Results -- Physical properties -- Water-column biogeochemistry -- Eutrophication gradient -- Sediment model -- Nutrient reduction scenarios -- Discussion -- Conclusions -- References -- Reference conditions for phytoplankton at Danish Water Framework Directive intercalibration sites -- References -- Coastal eutrophication research: a new awareness -- Introduction -- Challenges for coastal eutrophication research -- Coastal eutrophication as a component of global change -- References.
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  • 2
    Online Resource
    Online Resource
    Cham : Springer
    Keywords: Popular works ; Geochemistry ; Geobiology ; Nature ; Environment ; Earth ; Geology ; Marine sciences ; Freshwater ; Popular Science ; Biogeochemie ; Biomineralisation ; Kieselsäuren ; Siliciumdioxid ; Silicium ; Silicate ; Geobiologie ; Biogeochemie ; Biomineralisation ; Kieselsäuren ; Siliciumdioxid ; Silicium ; Silicate ; Geobiologie
    Description / Table of Contents: Do you know silica, the tetrahedra of silicon and oxygen constituting the crystals of New Agers and the desiccant in a box of new shoes? It's no mere mundane mineral. As chemically reacting silicate rocks, silica set off the chain of events known as the origin of life. As biomineralized opal, it is the cell wall, skeleton, spicules, and scales of organisms ornamenting numerous lobes of the tree of life. Cryptocrystalline silica made into stone tools helped drive the evolution of our hands and our capability for complex grammar, music, and mathematics. As quartz crystals, silica is impressively electric and ubiquitous in modern technology (think sonar, radios, telephones, ultrasound, and cheap but precise watches). Silica is inescapable when we take a drink or mow the lawn and it has already started to save the Earth from the carbon dioxide we're spewing into the atmosphere. This book tells these scientific tales and more, to give dear, modest silica its due
    Type of Medium: Online Resource
    Pages: Online-Ressource (XI, 201 p. 39 illus., 1 illus. in color, online resource)
    ISBN: 9783319540542
    Series Statement: SpringerLink
    Language: English
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  • 3
    Publication Date: 2023-06-20
    Description: Coastal waters have strong gradients in dissolved organic matter (DOM) quantity and characteristics, originating from terrestrial inputs and autochthonous production. Enclosed seas with high freshwater input therefore experience high DOM concentrations and gradients from freshwater sources to more saline waters. The brackish Baltic Sea experiences such salinity gradients from east to west and from river mouths to the open sea. Furthermore, the catchment areas of the Baltic Sea are very diverse and vary from sparsely populated northern areas to densely populated southern zones. Coastal systems vary from enclosed or open bays, estuaries, fjords, archipelagos and lagoons where the residence time of DOM at these sites varies and may control the extent to which organic matter is biologically, chemically or physically modified or simply diluted with transport off-shore. Data of DOM with simultaneous measurements of dissolved organic (DO) nitrogen (N), carbon (C) and phosphorus (P) across a range of contrasting coastal systems are scarce. Here we present data from the Roskilde Fjord, Vistula and Öre estuaries and Curonian Lagoon; four coastal systems with large differences in salinity, nutrient concentrations, freshwater inflow and catchment characteristics. The C:N:P ratios of DOM of our data, despite high variability, show site specific significant differences resulting largely from differences residence time. Microbial processes seemed to have minor effects, and only in spring did uptake of DON in the Vistula and Öre estuaries take place and not at the other sites or seasons. Resuspension from sediments impacts bottom waters and the entire shallow water column in the Curonian Lagoon. Finally, our data combined with published data show that land use in the catchments seems to impact the DOC:DON and DOC:DOP ratios of the tributaries most.
    Description: Academy of Sciences of Finland
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: BONUS COCOA and Bundesministerium für Bildung und Forschung
    Description: Academy of Finland
    Description: Danish Research Council for Independent Research
    Description: BONUS COCOA Project
    Description: Leibniz-Institut für Ostseeforschung Warnemünde (IOW) (3484)
    Keywords: ddc:551.9 ; Coastal systems ; Dissolved organic matter ; Riverine input ; Baltic Sea
    Language: English
    Type: doc-type:article
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