Search for dissertations about: "Benthic nutrient fluxes"

Showing result 1 - 5 of 8 swedish dissertations containing the words Benthic nutrient fluxes.

  1. 1. Benthic fluxes of biogenic elements in the Baltic Sea Influence of oxygen and macrofauna

    University dissertation from Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University

    Author : Nils Ekeroth; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sediment biogeochemistry; Bioturbation; Benthic nutrient fluxes; Bottom water oxygenation; Box corer; Sediment sampling; marin ekologi; Marine Ecology;

    Abstract : This thesis investigates how benthic fluxes of phosphorus (P), nitrogen (N), and silicon (Si) change upon oxygenation of anoxic soft bottoms in the brackish, eutrophicated Baltic Sea. Direct measurements in situ by benthic landers demonstrated that fluxes of dissolved inorganic P (DIP) from anoxic bottom sediments in the Eastern Gotland Basin are higher than previously thought (Paper I). READ MORE

  2. 2. Influence of resuspension on sediment-water solute exchange and particle transport in marine environments

    University dissertation from Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University

    Author : Elin Almroth Rosell; Göteborgs universitet.; Gothenburg University.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; resuspension; benthic fluxes; oxygen; dissolved inorganic carbon; nutrients; dissolved iron and manganese; in situ chambers; benthic lander; organic matter transport; ecological modeling; Gothenburg Archipelago; Gulf of Finland; Baltic Sea; Loch Creran; Scotland;

    Abstract : Marine sediments contain a large pool of nutrients, which if released would contribute to increased eutrophication, in spite of decreased nutrient loads from land and atmosphere. Resuspension is a process, which might influence the release of nutrients from the sediment to the overlying water. READ MORE

  3. 3. On benthic fluxes of phosphorus in the Baltic Sea proper – drivers and estimates

    University dissertation from Stockholm : Department of Systems Ecology, Stockholm University

    Author : Nils Ekeroth; Stockholms universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; marin ekologi; Marine Ecology;

    Abstract : This Thesis focuses on the exchange of phosphorus (P) across the sediment–water interface in the Baltic Sea proper, with particular attention to the influence of bioturbating macrofauna and benthic redox conditions. Benthic P fluxes have major influence on P availability in the water column, which in turn regulates growth conditions for dinitrogen fixating cyanobacteria in the Baltic proper. READ MORE

  4. 4. In situ remediation of contaminated sediments using thin-layer capping : effectiveness in contaminant retention and ecological implications

    University dissertation from Stockholm : Stockholms universitets förlag

    Author : Göran Samuelsson; Stockholms universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Thin layer capping; sediment remediation; activated carbon; contaminated sediment; benthic community; Systems Ecology; systemekologi;

    Abstract : Hydrophobic organic contaminants (HOCs) often reside in sediment sorbed to particles, most tightly to particles with high content of organic carbon. If persistent, such pollutants can accumulate in the sediment for many years and constitute a contamination risk for sediment-living organisms and organisms at higher trophic levels, including humans. READ MORE

  5. 5. Assessing Sub-Lethal Impacts of Petroleum Compounds on Marine Benthic Systems

    University dissertation from Chalmers University of Technology

    Author : Fredrik J. Lindgren; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Marin ekologi; Marine ecology; Toxikologi; Toxicology; Miljötoxikologi; Environmental toxicology; meiofauna; petroleum; bildanalys; subletala effekter; mikrobiellt samhälle; PAH;

    Abstract : Petroleum and its different distillates commonly end up in the marine environment. One source of these additions is discharges originating from shipping activities; accidents, ship wrecks, operational spills etc. READ MORE