Sökning: "Lichen"

Visar resultat 36 - 40 av 69 avhandlingar innehållade ordet Lichen.

  1. 36. Towards adaptive management of reindeer grazing resources

    Författare :Anna Olofsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis aims to create a scientifically founded proposal for improvement of optimal and sustainable use of reindeer pasture resources by an adaptive management approach. Hence, the adaptive management concept is reviewed and discussed with specific reference to reindeer husbandry. LÄS MER

  3. 37. The taxonomy of the genera Dirina and Roccellina (Roccellaceae)

    Författare :Anders Tehler; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Dirina and Roccellina are two lichen genera in the Roccellaceae. Both are herein monographed world wide. Thirty species, two subspecies, and six forms are recognized. The study includes detailed information on taxonomy, nomenclature, history, morphology, anatomy, chemistry, distribution and habitat. LÄS MER

  4. 38. Studies on spatial and temporal distributions of epiphytic lichens

    Författare :Håkan Lättman; Per Milberg; Jan-Eric Mattsson; Tord Snäll; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Lichens are an important group of organisms in terms of environmental issues, conservation biology and biodiversity, principally due to their sensitivity to changes in their environment. Therefore it is important that we develop our understanding of the factors that affect lichen distribution. LÄS MER

  5. 39. Pattern and process in Alpine communities of the Northwestern Caucasus

    Författare :Galina A. Pokarzhevskaya; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; biodiversity; life forms; life-history strategy; microtopography; snowbedcommunities; snow melting gradient; tussock; vegetative mobility; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Patterns in vegetation reflect certain processes affecting plant communities. The present work aims at describing patterns and revealing mechanisms operating in alpine vegetation belonging to four vegetation types: alpine lichen heaths, Festuca varia grasslands, Geranium-Hedysarum meadows and snowbed communities. LÄS MER

  7. 40. Fragmented landscapes : Assessment and communication of landscape connectivity in human-dominated landscapes

    Författare :Arvid Bergsten; Örjan Bodin; Bo Ebenman; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fragmentation; Connectivity; Network; Spatial; Landscape; Dispersal; Planning; Social-Ecological; Scale; IIC; STS; naturresurshushållning; Natural Resources Management;

    Sammanfattning : This licentiate thesis summarizes the first half of my PhD on the theme of management of fragmented landscapes. The thesis applies – and reflects on the use of – network analysis of connectivity in relation to landscape planning. LÄS MER