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Visar resultat 1 - 5 av 18 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Mysid growth, stable isotope fractionation, and energetics : implications for food web studies

    Författare :Elena Gorokhova; Ora Johansson; Stockholms universitet; []
    Nyckelord :Systems Ecology; systemekologi;

    Sammanfattning : Field data, stable isotope analyses of the Baltic Sea food web structure,and experimental studies of the functional response indicate that theomnivorous crustacean Mysis mixta (Crustacea, Mysidacea) has no distinct trophic position, but can potentially affect plankton communitystructure and compete with herring and sprat for the zooplankton. Toevaluate field data on mysid body constituents, abundance and populationstructure, and that of their potentialprey, basic knowledge of feeding behaviour, growth mechanisms, andreproductive capabilities are required. LÄS MER

  3. 2. Chlorinated Paraffins: improved understanding of their bioaccumulation and toxicity in Daphnia magna

    Författare :Mafalda Castro; Magnus Breitholtz; Anna Sobek; Elena Gorokhova; Lillemor Asplund; Martin Scheringer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chlorinated paraffins; POPs; bioaccumulation; toxicity; ecotoxicology; aquatic toxicology; daphnia magna; liposomes; passive dosing; hydrophobic; mixtures; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Chlorinated paraffins (CPs) are industrial chemicals, mainly used as flame retardants, plasticizers and metal cutting fluids. Their production has reached historically high levels in the last decade, with an annual production exceeding one million tonnes. LÄS MER

  4. 3. Towards understanding stable isotope signatures in stressed systems

    Författare :Caroline Ek; Elena Gorokhova; Katrine Borgå; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Stable isotope analysis; trophic position; chemical exposure; oxidative stress; Daphnia magna; Gammarus spp.; Limecola balthica; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Stable isotope analysis (SIA) is a valuable tool in ecotoxicology because δ13C and δ15N may provide insights into the trophic transfer of contaminants in a food web. The relationship between a species’ trophic position (TP, determined from δ15N) and internal concentration of biomagnifying contaminants can be established and used for regulatory purposes. LÄS MER

  5. 4. Application and interpretation of biomarkers in ecotoxicology - from molecular to individual level responses

    Författare :Sara Furuhagen; Elena Gorokhova; Carlos Barata; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biomarkers; oxidative stress; ORAC; reproduction; Daphnia magna; toxicity; environmental stress; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : The use of biomarkers is considered a promising alternative, or complement, to traditional ecotoxicological assays. Toxic effects are often initially manifested at the molecular or biochemical level, biomarkers are therefore used as sensitive indicators of toxic exposure. LÄS MER

  7. 5. Integrative approaches in ecotoxicological testing: Implications for biomarker development and application

    Författare :Sara Furuhagen; Elena Gorokhova; Magnus Breitholtz; Lars Förlin; Ann-Kristin Eriksson Wiklund; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biomarker; oxidative stress; Daphnia magna; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Ecotoxicology aims to understand toxic effects of chemicals in the environment. Effects can be observed at different levels of the biological organization, from molecular to ecosystem level. LÄS MER