Sökning: "estuary"

Visar resultat 1 - 5 av 22 avhandlingar innehållade ordet estuary.

  1. 1. Unraveling the importance of solid and adsorbed phase mercury speciation for methylmercury formation, evasion and bioaccumulation

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Sofi Jonsson; Umeå universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mercury; methylmercury; aquatic systems; estuary; Hg; MeHg; bioaccumulation; methylation; demethylation; evasion; sediment; water; terrestrial sources; atmospheric sources; climate change; eutrophication;

    Sammanfattning : Monomethylmercury, MeHg, is formed under anoxic conditions in waters, sediments and soils and then bioaccumulated and biomagnified in aquatic food webs, negatively effecting both human and wildlife health. It is generally accepted that precipitation of mercury, Hg, and adsorption of Hg to e.g. LÄS MER

  2. 2. Biomarkers for assessing benthic pollution impacts in a subtropical estuary, Mozambique

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Maria Perpétua Janeiro Scarlet; Göteborgs universitet.; Gothenburg University.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; subtrophical estuary; contaminants; biological hierarcial biomarkers; scope for growth; burrowing response; acethylcholinesterase; benthic fauna; southern Mozambique;

    Sammanfattning : This thesis focuses on the marine environment in a subtropical estuary and particularly on exploring a suite of easy-to-use, cost effective and environmentally valid biological response tools (biomarkers). The main driving force of the thesis is the knowledge of the numerous anthropogenic impacts. LÄS MER

  3. 3. Application of satellite data for investigation of water quality in coastal areas

    Detta är en avhandling från Water Resources Engineering, Lund University

    Författare :Chuqun Chen; Lunds universitet.; Lund University.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Atmospheric correction; Pearl River estuary; Daya Bay.; Numerical modeling; Chlorophyll-a; Water quality; Ocean color remote sensing; Gelbstoff;

    Sammanfattning : The population growth in China together with the rapid industrialization and urbanization have increased the utilization of natural resources, leading to more waste being released to the environment. Thus, the environmental conditions have degraded in many regions to a point where environmentally related problems have become the main limiting factors for economical development and social progress. LÄS MER

  4. 4. Suspended particulate matter, sedimentation and early diagenetic processes in the Kalix River estuary, northern Sweden

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Anders Widerlund; Luleå tekniska universitet.; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : Many important reactions controlling the transfer of elements from the continents to coastal waters and the oceans are taking place in estuaries. For many elements, estuaries can act as filters, capable of reducing the river load of dissolved and particulate elements to the oceans. LÄS MER

  5. 5. Riverine sources of bioreactive macroelements and their impact on bacterioplankton metabolism in a recipient boreal estuary

    Detta är en avhandling från Lund University, Faculty of Science, Center for Environmental and Climate Research / Department of Physical Geography and Ecosystem Science

    Författare :Ana Soares; Lunds universitet.; Lund University.; [2018-02]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dissolved organic carbon; DOC bioreactivity; nutrient bioavailability; dissolved organic matter; bacterioplankton production; bacterial respiration; aquatic ecology;

    Sammanfattning : The loading of macroelements such as, dissolved organic carbon (DOC), totalnitrogen (N) and total phosphorus (P) from terrestrial soils to aquatic systems isincreasing in the northern hemisphere. This phenomenon has several ecologicaland biogeochemical consequences for inland and coastal water systems, which arelinked to bacterial cycling of DOC, N and P. LÄS MER