Sökning: "forest management"

Visar resultat 26 - 30 av 340 avhandlingar innehållade orden forest management.

  1. 26. Optimal thinning : a theoretical investigation on individual-tree level

    Författare :Peter Fransson; Åke Brännström; Ola Lindroos; Oskar Franklin; Per Lundberg; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Forest management; Simulation; Optimization; Spatially explicit model; Individual-based model;

    Sammanfattning : Paper I: In paper I, we asked how a tree should optimally allocate its resources to maximize its fitness. We let a subject tree grow in an environment shaded by nearby competing trees. The competitors were assumed to have reached maturity and had stopped growing, thus creating a static light environment for the subject tree to grow in. LÄS MER

  3. 27. Planning under risk and uncertainty: optimizing spatial forest management strategies

    Författare :Nicklas Forsell; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 28. Appraisal of the participatory forest management program in southern Burkina Faso

    Författare :Pascaline Coulibaly-Lingani; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : In many developing countries there has been a paradigm shift in forest conservation and management strategies, away from State-centred control towards community-based schemes, with twin goals of fostering sustainable forest management and reducing poverty. In Burkina Faso, various policy reforms have been introduced and attempts have been made to devolve use and management rights to local communities since the 1980s. LÄS MER

  5. 29. Brazilian public protection regulations and the preservation of ecosystem services and biodiversity

    Författare :Flavio L. M. Freitas; Ulla Mörtberg; Jan Börner; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Brazil; Native vegetation; forest conservation; Brazilian Forest Act; Protected areas; Ecosystem services; Biodiversity; Land and Water Resources Engineering; Mark- och vattenteknik;

    Sammanfattning : Brazil is significant for sustaining ecosystems services and biodiversity of global importance. However, the expansion of forestry and agriculture to supply national and international markets often results in loss of ecosystem services and biodiversity. Public protection regulations play a crucial role in setting limits for agricultural expansion. LÄS MER

  7. 30. Effects of drought on boreal forest understory species

    Författare :Irena A. Koelemeijer; Kristoffer Hylander; Johan Asplund; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biodiversity conservation; boreal forests; bryophytes; canopy cover; climate change; drought; extreme climatic events; forest management; forest understory; fungi; lichens; plants; rainout shelter; soil communities; soil moisture; transplant experiment; Ecology and Evolution; ekologi och evolution;

    Sammanfattning : Extreme climatic events, such as droughts, can have large effects on biodiversity. Drought effects in forest understories are variable over small spatial scales and can be exacerbated, or buffered, by the local vegetation structure, distance to forest edges, hydrology, and soil characteristics. LÄS MER