Sökning: "Vegetation"

Visar resultat 1 - 5 av 524 avhandlingar innehållade ordet Vegetation.

  1. 1. Flygbildstolkning av vegetation : metodstudier för översiktlig kartering

    Författare :Margareta Ihse; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Flygfotografi;

    Sammanfattning : Investigations of the possibilities of producing medium scale survey maps of the vegetation cover by the interpretation of aerial photographs started at the Department of Physical Geograhy, University of Stockholm, in 1973. The aim was to produce vegetation maps more easily and more rapidly than by standard field methods. LÄS MER

  3. 2. Modelling regional climate-vegetation interactions in Europe : A palaeo perspective

    Författare :Gustav Strandberg; Erik Kjellström; Qiong Zhang; Johan Nilsson; Hans Renssen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Palaeoclimate; climate model; vegetation; vegetation changes; land-cover; changes; proxy data; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Sammanfattning : Studies in paleoclimate are important because they give us knowledge about how the climate system works and puts the current climate change in necessary perspective. By studying (pre)historic periods we increase our knowledge not just about these periods, but also about the processes that are important for climatic variations and changes. LÄS MER

  4. 3. Deciduous forest vegetation in Boreo-nemoral Scandinavia

    Författare :Martin Diekmann; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Forest vegetation; Vegetation ecology; Oligotrophic oak forests; Mesotrophic mixed deciduous forests; Eutrophic elm-ash forests; Eutrophic alder-ash forests; Ekologi; Skogar;

    Sammanfattning : .... LÄS MER

  5. 4. Circumpolar impacts of herbivores on Arctic tundra vegetation

    Författare :Elin Lindén; Johan Olofsson; Maja K. Sundqvist; Mariska te Beest; Elisabeth S. Bakker; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; herbivores; grazing; Arctic; circumpolar; tundra; vegetation; plant defence; secondary metabolites; shrub birch; exclosures; vegetation; species diversity; biology; biologi;

    Sammanfattning : Arctic tundra vegetation provides many ecological services that have implications for the global climate. However, the tundra biome is currently changing in response to increasing temperatures. Herbivores may mitigate some of these responses to warming through their impact on Arctic vegetation. LÄS MER

  7. 5. Wastewater treatment in constructed wetlands : Effects of vegetation, hydraulics and data analysis methods

    Författare :Hristina Bodin; Karin Tonderski; Jesper Persson; Stefan Weisner; Per Milberg; Hans Brix; Linköpings universitet; []
    Nyckelord :constructed wetland; free water surface flow; wastewater treatment; Kenya; Sweden; vegetation; harvest; Cyperus papyrus; Echinochloa pyramidalis; mass load; phosphorus; ammonium; suspended solids; pollutant removal; hydraulics; residence time distribution; data analysis methods; Konstgjorda våtmarker; avloppsvatten; vattenrening; fosfor; ammonium; partiklar; Kenya; Sverige; växter; Cyperus papyrus; Echinochloa pyramidalis; skörd; hydraulik; dataanalysmetod;

    Sammanfattning : Degradation of water resources has become one of the most pressing global concerns currently facing mankind. Constructed Wetlands (CWs) represent a concept to combat deterioration of water resources by acting as buffers between wastewater and receiving water bodies. LÄS MER