Search for dissertations about: "Växtekologi"

Showing result 21 - 25 of 119 swedish dissertations containing the word Växtekologi.

  2. 21. Herbivory, phenotypic variation, and reproductive barriers in fucoids

    Author : Helena Forslund; Lena Kautsky; Ove Eriksson; Stein Fredriksen; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Non-indigenous species; Enemy Release Hypothesis; Asexual reproduction; Phlorotannins; Distribution; Plant Ecology; växtekologi;

    Abstract : Along the shores of the Northern hemisphere Fucus (Phaeophyceae) species are a prominent presence, providing substrate, shelter, and food for many species. Fucus evanescens, a non-indigenous species (NIS) in Sweden, and F. READ MORE

  4. 22. Mountain vegetation in the Faroe Islands in a climate change perspective

    Author : Anna Maria Fosaa; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; klimatologi; marklära; Växtekologi; Fysisk geografi; climatology; cartography; pedology; geomorphology; climate change.; Physical geography; Raunkiær´s life-forms; biodiversity; Vegetation zones; plant communities; Plant ecology; kartografi; geomorfologi;

    Abstract : This thesis is a study of the mountain vegetation in the Faroe Islands based on five altitudinal transects sampled during the period 1999-2001. The vegetation was studied on the basis of plant communities, life-forms and biodiversity of vascular plant species and is discussed in a climate change perspective. READ MORE

  5. 23. Hemoproteins of Enterococcus faecalis

    Author : Lena Frankenberg; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Växtekologi; heme Enterococcus faecalis enterococci catalase cytochrome; Plant ecology;

    Abstract : The gram-positive bacterium Enterococcus faecalis is a commensal organism, often found in the gut of humans and other animals. It can cause opportunistic disease and it frequently causes nosocomial infections. Treatment of such infections is often impaired by this organisms broad intrinsic and acquired resistance to antibiotics. E. READ MORE

  6. 24. Soluble and Plant Available Phosphorus in Acid Soils

    Author : Ann-Mari Fransson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; solubilisation mechanisms; Phosphorus extractions; Oxalate extraction; P fertilisation; Plant ecology; Växtekologi;

    Abstract : The P availability and solubility differ between soils and plants seem to have different ways of utilising the P present. The many P fractions present in soil interact and are closely related to another and transformations may easily occur. Due to this more P than the soluble fraction is available to plants. READ MORE

  7. 25. Effects of enhanced ultraviolet-B radiation on subarctic ecosystems

    Author : Carola Gehrke; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; pigmentation; photosynthesis; dark respiration; shoot morphology; shoot growth; phanerogams ; species composition cryptogams; productivity; decomposition; dwarf shrubs; bryophytes; peatland ecosystem; heath ecosystem; UV-B; ozone depletion; Plant ecology; Växtekologi;

    Abstract : Biologically harmful ultraviolet-B radiation (UV-B, 280-320 nm) is increasing at the Earth´s surface owing to stratospheric ozone depletion. This is of global concern due to potential impacts of enhanced UV-B radiation on the biosphere. READ MORE