Sökning: "Skeppsvik"

Hittade 4 uppsatser innehållade ordet Skeppsvik.

  1. 1. The significance of age, plant density and proximity of young Silene dioica populations on the incidence and prevalence of anther-smut disease (Microbotryum silenes-diocae)

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Högberg Axel; [2016]
    Nyckelord :Silene dioica; Microbotryum silenes-dioicae; neighbourhood; population age; Skeppsvik archipelago;

    Sammanfattning : Most life forms, including plants, are more or less susceptible to infection by pathogens. Whereas plant-pathogen interactions are well studied in human-managed systems they are less known in natural ecosystems. LÄS MER

  3. 2. Interactions between the rust fungus, Puccinia paludosa, and the alternate host Pedicularis palustris : A field study in the archipelago of Skeppsvik, northern Sweden

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Sarah Lundgren; [2014]
    Nyckelord :Rust fungi; Alternate host; Dispersal ability; Fitness effects; Aecidospores;

    Sammanfattning : Plant-pathogen interactions are of interest due to their impact on our economy, social welfare and not to mention, our environment. One important group of pathogens are the rust fungi, many which require two host plants to survive. LÄS MER

  4. 3. Analysis of Selection and Genetic Drift in a Dioecious Plant : Spatial Genetic Structure and Selection in Phenotypic Traits in a Young Island Population of Silene dioica

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Bea Angelica Andersson; [2014]
    Nyckelord :selection; genetic drift; quantitative trait; FST; PST; drift; evolution; founder event; gene flow; Silene dioica; dioecious; substructure; subpopulation; phenotypic trait; pollinator preference; Skeppsvik; Sweden; succession;

    Sammanfattning : Selection and genetic drift are often competing forces in shaping genetic structure in populations. Genetic drift will often effectively cancel out the effect of selection when population sizes are small, such as in colonizing island populations. LÄS MER

  5. 4. Which is the costlier sex? : Sexual dimorphism and resource allocation in a dioecious herb, Silene dioica

    Master-uppsats, Institutionen för ekologi, miljö och geovetenskap

    Författare :Elisabet Åkerlund; [2011]
    Nyckelord :sexual dimorphism; resource allocation; cost of reproduction;

    Sammanfattning : Life-history theory proposes that different activities, such as growth, maintenance and reproduction compete for limited resources and therefore, life-history traits are bound together by physiological trade-offs. In dioecious species, females are assumed to invest a higher amount of resources in reproduction in comparison with males and this higher investment in reproduction is then assumed to have numerous consequences for the expression of other life-history traits. LÄS MER