Sökning: "Växtekologi"

Visar resultat 1 - 5 av 114 avhandlingar innehållade ordet Växtekologi.

  1. 1. Nutrient and Organic Matter Dynamics in Beech Forest Floors, in Relation to the Presence of Ground Flora

    Detta är en avhandling från Department of Ecology, Lund University

    Författare :Frida Andréasson; Lund University.; Lunds universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bioavailability; mineralisation; soil acidity; soil matrix solution; soil leachate; nitrate; ammonia; dissolved organic carbon; beech; Ground flora; forest floor; O horizon; A horizon; Plant ecology; Växtekologi;

    Sammanfattning : The objective of this thesis was to quantify differences between adjacent patches with and without ground flora of Deschampsia flexuosa L. Trin or Anemone nemorosa L. in two acid European beech (Fagus sylvatica L.) forest floors in south-west of Sweden. LÄS MER

  2. 2. Regional Nutrient Budgets in Forest Soils in a Policy Perspective

    Detta är en avhandling från Department of Chemical Engineering, Lund University

    Författare :Cecilia Akselsson; Lund University.; Lunds universitet.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi; geomorphology; Physical geography; Miljökemi; Environmental chemistry; skogsteknik; skogsbruk; Skogsvetenskap; forestry technology; forestry; Silviculture; Näringslära; Nutrition; Växtekologi; policy-making; Plant ecology; regional scale; deposition; eutrophication; carbon sequestration; acidification; Nutrient budget;

    Sammanfattning : Sweden's forests are one of its most important natural resources, as well as being important from ecological and social perspectives. Nutrient sustainability is essential to maintain the production capacity and reduce the effects of acidification and eutrophication. LÄS MER

  3. 3. Vegetation structure and interactions on mires

    Detta är en avhandling från Crister Albinsson, Dept of Natural Sciences, Högskolan i Kalmar, Box 905, S-391 29 Kalmar, Sweden

    Författare :Crister Albinsson; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; soligenous water supply; sloping fen; ordination; niche breadth; Narthecium ossifragum; liverwort; light competition; life strategy; hepatic; environmental gradient; classification; Association analysis; autecology; southern Sweden; Sphagnum; vegetation; Plant ecology; Växtekologi;

    Sammanfattning : The distribution of sloping fens in southern Sweden was mapped, their vegetation sampled and related to the environmental variables recorded. This mire type is distributed further to the east than previously reported, namely around the highest post-glacial limit of the sea level. LÄS MER

  4. 4. Olfactory cues and insects - scaling relations and immigration rates

    Detta är en avhandling från Stockholm : Department of Botany

    Författare :Petter Andersson; Stockholms universitet.; [2010]
    Nyckelord :växtekologi; Plant Ecology;

    Sammanfattning : For herbivorous insects, location of host plants and habitat patches strongly depend on the type of sensory cue that is used during the search process and the probability of detecting a patch depends on the relative attraction between patches of different size. The visual impression of a patch increases predictably with the patch diameter and consequently, immigration rates of visually searching insects are often predicted by the scaling to patch size of visual cues. LÄS MER

  5. 5. The importance of search behavior and movements for spatial distributions of herbivorous insects

    Detta är en avhandling från Stockholm : Department of Botany, Stockholm University

    Författare :Petter Andersson; Stockholms universitet.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Olfactory search; Habitat heterogeneity; Species-traits; Immigration; Scaling relationships; Patch size; Plant-insect interactions; EAG; Odors; Pheromones; Plant Ecology; växtekologi;

    Sammanfattning : Insect populations commonly show large spatial variation in density, and much variation have been shown to be explained by the search behavior applied by the insect when locating habitat patches. This thesis explores the importance of odor-mediated attraction for immigration rates of herbivorous insects in relation to the size of the patches and the density of host plants within the patches. LÄS MER