Sökning: "Vaccinium myrtillus"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Vaccinium myrtillus.

  1. 1. Nitrogen, parasites and plants : key interactions in boreal forest ecosystems

    Författare :Joachim Strengbom; Lars Ericson; Gaius R Shaver; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Critical loads; Deschampsia flexuosa; amino acids; mycorrhizal fungi; natural enemies; N deposition; N limitation; vegetational composition; Valdensia heterodoxa; Vaccinium myrtillus;

    Sammanfattning : In the work described in this thesis I studied how increases in nitrogen (N) inputs may affect plant community structure in boreal forest understorey vegetation. These phenomena were investigated in N fertilization experiments and along a national N deposition gradient. LÄS MER

  3. 2. Factors affecting the anthocyanidin concentration in fruits of Vaccinium myrtillus L

    Författare :Andreas Åkerström; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Vaccinium myrtillus, a small dwarf-shrub native to northern Europe has received much attention during recent decades because of its economic value and as a result of the health promoting substances found in the fruits. The work outlined in this thesis focused on the effects of exogenous factors such as temperature, light and nutrient availability on the concentration of anthocyanidins in the fruits. LÄS MER

  4. 3. Boreal vegetation responses to forestry as reflected in field trial and survey data

    Författare :Johan Bergstedt; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Logging; boreal forest; selective cutting; scarification; ground-layer flora; survey data;

    Sammanfattning : This thesis had two objectives: the first objective was to evaluate the response of forest ground vegetation to selected forestry operations, i.e. cutting of different intensities and scarification; the second objective was to compare the use of survey data in vegetation research with that of more traditional research using field trials - i.e. LÄS MER

  5. 4. Forest floor vegetation in Sweden : impacts of intensified forestry, nutrient addition and changes in forest structure

    Författare :Per-Ola Hedwall; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : In boreal forests, dwarf-shrubs (Vaccinium spp.) often dominate the forest floor and are key-stone species in ecosystems due to their importance for nutrient cycling and as a major food source for herbivores. Forestry affects the vegetation both directly through management and indirectly by altering the forest structure. LÄS MER

  7. 5. Retention forestry as a conservation measure for boreal forest ground vegetation

    Författare :Samuel Johnson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The boreal forest is prone to natural disturbances, especially fire. Despite this, the disturbance caused by forest management is shown to have a severe effect on the system’s biodiversity. LÄS MER