Sökning: "terns"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet terns.

  1. 1. Flight strategies in migrating birds: when and how to fly

    Författare :Martin Green; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; geese; waders; terns; Animal ecology; Djurekologi; wind tunnel; radio telemetry; satellite telemetry; radar; formation flight; flight speed adjustment; wind drift; energy savings; departure decisions; bird migration; wind;

    Sammanfattning : Wind has a profound influence on migrating birds since it inevitably will influence travel time and energy expenditure. In this thesis I investigate how migrating birds are affected by, and use winds. LÄS MER

  3. 2. Temporal relationships between fish-eating birds and their prey in a north Swedish river

    Författare :Kjell Sjöberg; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Seasonal and diel activity; food consumption; predator-prey relationships; fish-eating birds; anadromous fish; Mergus merganser; M. serrator; Sterna spp.; Larus spp.; Lampetra fluviatilis; Gasterosteus aculeatus;

    Sammanfattning : The seasonal and diel feeding habits of the goosander, Mergus merganser, the red-breasted merganser, M. serrator, gulls (Larus canus, L. argentatus and L. fuscusj and terns, Sterna hirundo/paradisaea were studied at 64V05'N. LÄS MER

  4. 3. The role of nutrients for stream ecosystem function in Arctic landscapes : drivers of productivity under environmental change

    Författare :Maria Myrstener; Ryan A. Sponseller; Reiner Giesler; Ann-Kristin Bergström; Tenna Riis; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nutrients; Stream; Arctic; Boreal; Primary productivity; Algae; Biofilm; Nutrient limitation; Nitrogen; Phosphorus;

    Sammanfattning : Arctic and sub-Arctic freshwaters are currently experiencing substantial ecosystem changes due to the effects of global warming. Global warming effects on these freshwaters include increasing water temperatures, altered hydrological patterns, shifts in riparian vegetation and changes in the export of nutrients and carbon from soils. LÄS MER

  5. 4. Grapes in the Desert : Metaphors, Models, and Themes in Hosea 4-14

    Författare :Göran Eidevall; Centrum för teologi och religionsvetenskap; []
    Nyckelord :HUMANIORA; HUMANITIES; Hebrew Bible; Bibelvetenskap; Bible; reversal; personification; imagery; simile; theme; model; metaphor theory; metaphor; prophetical literature; Hosea; Old Testament; Old Testament exegesis; Gamla testamentets exegetik;

    Sammanfattning : This study explores the textual world of Hosea 4-14. To this end it uses a melhod informed by modern metaphor theory. At the outset, the hypothesis that chapters 4-14 in the book of Hosea constitute a coherent literary composition is submitted. The perspectival theory advanced by Eva F. LÄS MER

  7. 5. Wetland creation and restoration for biodiversity : outcomes of conservation initiatives to benefit birds, amphibians and occasionally fish

    Författare :Ineta Kacergyte; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Wetlands are one of the world’s most important ecosystems, but they are largely destroyed, modified, polluted and degraded. This has resulted in declines in wetland biodiversity, including that of birds, amphibians and fish. To mitigate those declines, many wetlands have been created and restored worldwide. LÄS MER