Search for dissertations about: "species differences"

Showing result 11 - 15 of 788 swedish dissertations containing the words species differences.

  2. 11. The impact of cormorant nesting colonies on plants and arthropods

    Author : Gundula S. Kolb; Peter Hambäck; Lenn Jerling; Post David; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; seabirds; cormorants; islands; nitrogen; phosphorus; plants; arthropods; δ15N; Baltic Sea; ecological stoichiometry; species richness; species composition; numeric response; Biology; Biologi; Plant Ecology; växtekologi;

    Abstract : Seabirds concentrate large amounts of marine nutrients on their nesting islands. This nutrient input can have large consequences for island food webs and community structure. The high nutrient load may also cause runoff into surrounding waters and affect marine communities. READ MORE

  4. 12. Semi-natural meadows in southern Sweden - changes over time and the relationship between nitrogen supply and management

    Author : Gudrun A I Berlin; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant community dynamic; Nitrogen; Mowing; Meadows; Management; Long-term study; Landscape changes; Field experiment; Community diversity; Fertilisation; Species changes; Species turnover; Plant ecology; Växtekologi;

    Abstract : In this thesis, I have studied continuously managed semi-natural meadows in south-central Sweden. The purpose was 1) to make a survey of meadow vegetation in the region 2) to compare two investigations of the vegetation, one from 1963-1966 and one from 1990 3) to investigate experimentally in the field how increased nitrogen supply rate as well as changed management intensity effects the nitrogen economy and species richness in two meadow communities. READ MORE

  5. 13. Ground beetle dynamics in intensively managed agricultural landscapes

    Author : Erkki Palmu; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carabidae; species richness; species diversity; functional traits; body size; emergence; dispersal; stable isotopes; deuterium; oxygen; crop diversification; landscape heterogeneity; agricultural management;

    Abstract : In this thesis I have focused on studying dynamics of ground beetle assemblages in intensively managed agricultural landscapes. By definition, the land cover of these landscapes is dominated by annually tilled farmland, comprising a range of different crop types, in the context of the southern Swedish province of Scania mostly winter wheat, spring barley, winter rapeseed, and sugar beets. READ MORE

  6. 14. In Vivo Active Drug Uptake and Efflux at the Blood-Brain Barrier : With Focus on Drug Transport Interactions

    Author : Muhammad Waqas Sadiq; Margareta Hammarlund-Udenaes; Sven Björkman; N. Joan Abbott; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Blood-brain barrier; Active uptake transport; Microdialysis; P-glycoprotein; Drug interactions; Species differences; Pharmacokinetics; Pharmacodynamics; NONMEM; Pharmaceutical Science; Farmaceutisk vetenskap;

    Abstract : The blood-brain barrier (BBB) controls the movement of substances into and out of the brain. The tight junctions between endothelial cells and energy dependent transporters in the BBB influence rate and extent of drug distribution to the brain. READ MORE

  7. 15. Regional and local variation in plant species richness

    Author : Cecilia Dupré; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; coastal meadows; deciduous forests; dry grasslands; grazing; habitat configuration; habitat quality; hump-shaped curve; life history traits; regional species pool; soil factors; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; ekologisk botanik; Ecological Botany;

    Abstract : In this thesis, I examine the variation in plant species richness along gradients of productivity and disturbance in grasslands and forest habitats in southern Sweden, and I compare the documented patterns with theoretical predictions. Moreover, I evaluate the relative importance of habitat quality and habitat configuration for the occurrence of field layer species in deciduous forests. READ MORE