Essays about: "pioneer species"

Showing result 21 - 25 of 26 essays containing the words pioneer species.

  1. 21. Influence of light competition on vitality in old aspen

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Marianne Karlsson; [2009]
    Keywords : aspen; Populus tremula; vitality; light competition; biodiversity; stand density; management;

    Abstract : European aspen (Populus tremula) is a pioneer tree species that has a high importance for biodiversity. In Sweden, the number of long-continuity aspen stands has decreased during the last century. READ MORE

  3. 22. Betula : arter och sorter

    University essay from SLU/Dept. Of Landscape Architecture, Planning and Management

    Author : Cecilia Öxell; [2008]
    Keywords : Betula; björk;

    Abstract : As birch is one of the most common trees in Sweden, and probably one of the easiest for someone who lives here to identify, it is interesting to note that most people do not know how variable the genus is and how widely it is distributed across the northern hemisphere. One can find birch growing at both high and low elevations, demanding different soil conditions and preferring varying amounts of sunlight. READ MORE

  4. 23. Uttag av energisortiment vid gallring av contorta : ett komplement till konventionell gallring?

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Fredrik Gardmo; [2007]
    Keywords : contortatall; allokering av biomassa; biobränsleskörd; energisortiment;

    Abstract : A recommendation for stand treatment of lodgepole pine (Pinus contorta) is, in a scientific point of view, lacking when it comes to harvesting for biomass energy. Within the next decades it is expected that 280 000 hectares of lodgepole pine will have reached thinning age on the domains of Svenska Cellulosa Aktiebolaget (SCA). READ MORE

  5. 24. Kan biologisk mångfald ökas i ett avsatt skogsområde? : skötselplan för Storskogsberget på Holmen skogs marker, distrikt Umeå

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Linnea Forsmark; [2007]
    Keywords : biologisk mångfald; skötselplan; naturvärdesbedömning;

    Abstract : The biodiversity of the Swedish forest has degenerated since the beginning of the 19th century when fire suppression and large scale logging first occurred. Together with a changed land use, these actions today have had a negative influence on many forest dwelling species, due to gradual reduction of natural processes, successions and different structures from the forest ecosystem. READ MORE

  6. 25. En jämförelse av sitkagranens (Picea sitchensis) och den vanliga granens (P. abies) produktion

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Fredrik Tengberg; [2005]
    Keywords : Picea sitchensis; sitkagran; Picea abies; volymproduktion; odlingsegenskaper; ProdMod;

    Abstract : Sitka spruce (Picea sitchensis) is a tree species that have its natural distribution along the West Coast of North America, from Alaska in the north to northern California in the south. Sitka spruce is a typical coastal tree species that can reach heights up to 85 meters and occurs in single pure as well as in mixed stands. READ MORE