Sökning: "Estland"

Visar resultat 21 - 24 av 24 avhandlingar innehållade ordet Estland.

  1. 21. Dispersal, inbreeding and fitness in natural populations

    Författare :Bengt Hansson; MEMEG; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; immigration; inbreeding; inbreeding depression; heterozygosity; microsatellite; great reed warbler; bird; Djurekologi; Animal ecology; philopatry; heritability; founder event; dispersal; bottleneck;

    Sammanfattning : To evaluate how inbreeding affects the viability of small populations, it is crucial to determine what constitutes a population (i.e., the number of breeders in local patches and the degree of dispersal), and also to estimate the reproductive consequences of philopatry and emigration. LÄS MER

  3. 22. Diversity and phylogeography in Alisma (Alismataceae), with emphasis on Northern European taxa

    Författare :Anders Jacobson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; morphology; phytogeography; chemotaxonomy. Physiology of nonvascular plants; taxonomy; Systematic botany; Baltic Sea; Europe; refugia; post-glacial migration; phylogeography; marsh plants; genetic variation; aquatic plants; Alisma; Systematisk botanik; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

    Sammanfattning : In the present thesis the phylogeny and patterns of genetic diversity of the plant genus Alisma (Alismataceae) were investigated by means of genetic markers (RAPDs, allozymes, and ITS and trnL sequences). Additionally, morphological studies were carried out in paper IV. LÄS MER

  4. 23. Intraspecific variation in Rhinanthus angustifolius. Local adaptation, phenotypic plasticity and geographical structure

    Författare :Anneli Jonstrup; Biodiversitet; []
    Nyckelord :Ecotype; Local adaptation; Phenotypic plasticity; Parallel evolution; Geographical structure; Hemiparasite; Rhinanthus;

    Sammanfattning : Plant species often adapt to local environmental conditions, which can result in the formation of genetically and phenotypically distinct ecotypes. Ecotypes can evolve rapidly, and may be a first step in the process of ecological speciation. LÄS MER

  5. 24. Utilization and allocation of organs for transplantation - medical and ethical aspects

    Författare :Marie Omnell-Persson; Kirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; estetik; metafysik; kunskapsteori; ideologi; Immunology; serology; transplantation; Immunologi; serologi; ideology; epistemology; aesthetics; metaphysics; Systematic philosophy; ethics; utilization; organ donation; kidney transplantation; Allocation; attitudes; Praktisk filosofi;

    Sammanfattning : Great efforts have been made to find solutions to the shortage of organs, such as extending the donor pool by accepting so-called marginal donors and development of transplantation of organs from animals (xenotransplantation, xt). Due to the scarcity of organs, there is a long tradition of prioritizing among patients on the waiting list for transplantation. LÄS MER