Sökning: "forest cover"

Visar resultat 11 - 15 av 149 avhandlingar innehållade orden forest cover.

  1. 11. Regeneration in continuous cover forestry systems

    Författare :Charlotta Erefur; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The overall aim of the studies underlying this thesis has been to qualify and quantify the regeneration of tree species in a range of typical growing environments of possible Continuous Cover Forestry (CCF) silvicultural systems in boreal forests of northern Sweden. Data presented in Papers I and II show that the light environment did not differ significantly between points at different distances to trees, but it was clearly affected by the stand stem density (SSD). LÄS MER

  3. 12. Strain Gradient Plasticity Modelling of Precipitation Strengthening

    Författare :Mohammadali Asgharzadeh; Jonas Faleskog; Samuel Forest; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The introduction of particles and precipitates into a matrix material results in strengthening effects. The two main mechanisms involved in this matter are referred to as Orowan and shearing. To numerically study this phenomenon is the motivation to the research done, which is presented here in this thesis. LÄS MER

  4. 13. Opposition and adjustment to industrial ‘greening’ : the Swedish forest industry’s (re)actions regarding energy transition – 1989-2009

    Författare :Mikael Ottosson; Jonas Anshelm; Claes-Fredrik Helgesson; Hans Andersson; Susse Georg; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Forest industry; energy; electricity; forests; industrial greening; industrial change; actor network theory; sociology of industry; strategic management; science and technology studies; Skogsindustri; energi; elektricitet; skog; industriell miljöanpassning; industriell förändring; aktörsnätverksteori; branschsociologi; strategiforskning; teknik- och vetenskapsstudier; Technology and social change; Teknik och social förändring;

    Sammanfattning : This thesis analyses how the Swedish forest industry has (re)acted regarding the energy transition and, in particular, regarding the reconstruction of the electricity and forest resources in Sweden during the 1989–2009 period. The thesis consists of four papers that analyse how the Swedish forest industry by means of energy management practices at individual pulp and/or paper mills, in corporate strategies performed by CEOs and boards of directors, and via its industry association, has dealt with mounting political and public demands for the industry to become ‘greener’. LÄS MER

  5. 14. Incentives and Forest Reform: Evidence from China

    Författare :Yuanyuan Yi; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Forest devolution; Household management; Forest investment; Deforestation; Allocative efficiency; Household welfare; Forestland rental markets; Collective forest tenure reform; Managerial incentives; Environmental protection; State-owned forests; State-owned enterprises; Chinese-style federalism; Two-principal; one-agent model; China;

    Sammanfattning : Chapter I: Forest Devolution Reform in China: A Trigger for Investment or Deforestation? I investigate whether and how the devolution of forestland to households in China triggered investment in forestland, and its effect on forest resource conditions. The investment analysis is based on a panel dataset of a two-round survey of 3,000 households in eight provinces before and after the implementation of the forest devolution reform, while the analysis of resource conditions is based on satellite imagery on forest cover and vegetation during 2001-2012. LÄS MER

  7. 15. Forest-savanna transitions: Understanding adaptation and resilience of the tropical forest ecosystems using remote sensing

    Författare :Chandrakant Singh; Ingo Fetzer; Lan Wang-Erlandsson; Ruud van der Ent; Stefano Manzoni; Udita Sanga; Vivian Ribeiro; Stockholms universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Environmental Sciences; miljövetenskap; Ecology and Evolution; ekologi och evolution; Hydrology; hydrologi;

    Sammanfattning : Climate and deforestation-induced changes in precipitation drive tropical forest-savanna transitions. However, precipitation alone provides a superficial understanding of the underlying mechanism behind these transitions. This is because our knowledge of how vegetation responds to changes in hydroclimate is fragmented. LÄS MER