Search for dissertations about: "Marinbiologi"

Showing result 11 - 15 of 42 swedish dissertations containing the word Marinbiologi.

  2. 11. Role of Lipids in the fate of organochlorine compounds in Aquatic Ecosystems

    Author : Göran Ewald; LUCSUS; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Hydrobiology; biotransport; redistribution; bioaccumulation; extraction; ecological persistence; chlorinated fatty acids; DDT; PCB; organic pollutants; Lipids; triacylglycerols; phospholipids; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

    Abstract : Both results of laboratory experiments and material collected in the field have shown the lipid composition in organisms to have a significant effect on the bioaccumulation of pollutants and on the lipid steady-state concentrations of pollutants there. The redistribution of persistent organic pollutants which occurs in organisms as a consequence of the depletion of lipid depot, was studied in a population of migrating Pacific salmon (Oncorhynchus nerka). READ MORE

  4. 12. The significance of sexuality and cyst formation in the life-cycles of four marine dinoflagellate species

    Author : Rosa Figueroa; Enhet akvatisk ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cyst; Hydrobiology; akvatisk ekologi; marine biology; aquatic ecology; limnology; sexuality.; meiosis; Lingulodinium polyedrum; life-cyle; limnologi; Marinbiologi; Gymnodinium nolleri; Gymnodinium catenatum; Alexandrium catenella; dinoflagellates;

    Abstract : Sexuality and cyst formation were studied in the marine dinoflagellate species Gymnodinium catenatum Graham, Gymnodinium nolleri Ellegaard ? Moestrup, Alexandrium catenella (Whedon et Kofoid) Balech, and Lingulodinium polyedrum (Stein) Dodge. The study included the morphological characterization of sexual stages and processes, the time and description of meiosis, the study of the length and regulation of the mandatory dormancy period of resting cysts, and the relationships among parental strains and cyst progeny at phenotypic and molecular levels. READ MORE

  5. 13. Benthic invertebrate food webs in the Baltic Sea : Anthropogenic pressure effects and methodological advancements

    Author : Julie Garrison; Francisco Nascimento; Ángel Borja; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; food web; trophic network; detritivore; Baltic Sea; macrofauna; marinbiologi; Marine Biology;

    Abstract : Trophic interactions are ecologically important, as they structure communities, and globally important for the ecosystem functions that they facilitate. Anthropogenic pressures are altering the structure of food webs, their stability, and resilience to change. READ MORE

  6. 14. Food Quality for Zooplankton in Humic Lakes

    Author : Kelly Gutseit; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; limnology; Hydrobiology; marine biology; Clear water lakes; Plankton; Seston; Elements; Fatty acids; Humic lakes; Food quality; Zooplankton; limnologi; akvatisk ekologi; aquatic ecology; Marinbiologi;

    Abstract : Food quality affects growth, reproduction and community structure of zooplankton, and has implications for nutrient cycling and the transfer of energy and matter in aquatic food chains. While the issue of food quality in clear water lakes has received great recent attention, studies on food quality for zooplankton in humic lakes are scarce. READ MORE

  7. 15. Ecology of zooplankton communities: climate, dormancy, and benthic-pelagic coupling

    Author : Mikael Gyllström; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Marinbiologi; limnologi; akvatisk ekologi; limnology; Hydrobiology; marine biology; aquatic ecology; phytoplankton; temporal stability; recruitment; seasonal succession; environmental cues; diapause; shallow lakes; predation; enrichment; climate; temperature;

    Abstract : This thesis describes how influences, such as top down and bottom up forces, shape zooplankton communities in shallow lakes. I have also extended the traditional food-web theory by investigating the effects of climate on total biomass, taxonomic composition, and temporal properties of zooplankton communities. READ MORE