Essays about: "Betula pubescens"

Showing result 16 - 20 of 32 essays containing the words Betula pubescens.

  1. 16. Röjningsformens effekt på den yttre kvalitén hos björkstammar när beståndet närmar sig första gallring

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

    Author : Liisa Sars; [2012]
    Keywords : glasbjörk; röjning; skogsskötsel; toppröjning;

    Abstract : Virke av björk (Betula pendula och Betula pubescens) används främst som massaved och brännved. Dock finns efterfrågan på sortiment som fanertimmer och tumstockstimmer med höga krav på kvalitet. READ MORE

  3. 17. Röjningsformens effekt på tallens (Pinus sylvestris L.) tillväxt och kvalitetsegenskaper

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

    Author : Axel Eriksson; [2012]
    Keywords : kvistdiameter; elasticitetsmodul; toppröjning; stråkröjning; branch diameter; modulus of elasticity; topping; corridor cleaning;

    Abstract : Tallen (Pinus Sylvestris L.) är för den svenska skogsindustrin ett av de viktigaste trädslagen. Tallens kvalitet är påverkbar genom röjning, där röjningens intensitet och tidpunkt är avgörande för tallens diametertillväxt, årsringsbredd, kvistdiameter, krongränshöjd, stamform, juvenilvedsandel och elasticitetsmodul. READ MORE

  4. 18. Restoration of a Rich Fen by Top Soil Removal : Temporal and Spatial Responses among Vascular Plants, Bryophytes and Land Snails during 15 years

    University essay from Institutionen för biologisk grundutbildning

    Author : Liselott Evasdotter; [2011]
    Keywords : rich fen; restoration; top soil removal; succession; land snails;

    Abstract : Rich fens are calcareous and nutrient poor wetlands with a rich flora of orchids, sedges and mosses. As many as one hundred plant species are rich fen specialists. Many wetlands have been drained historically, and transformed to agricultural land or production forests. Today rich fens cover only 2-3% of the total mire area in Sweden. READ MORE

  5. 19. Increase of tree abundance between 1960 and 2009 in the treeline of Luongastunturi in the northern Swedish Scandes : change detection based on aerial photographs

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Oskar Löfgren; [2011]
    Keywords : geography; physical geography; treeline dynamics; mountain birch; aerial photo interpretation; geografi; naturgeografi; trädgränsen; fjällbjörk; flygbildstolkning; Earth and Environmental Sciences;

    Abstract : Aerial photo interpretation shows a recent densification of trees has been occurring between 1960 and 2009 in the mountain birch (Betula pubescens ssp. czerepanovii) forest of the treeline ecotone in northern Swedish mountains. READ MORE

  6. 20. Within-tree fluctuating asymmetry of mountain birch in subarctic Sweden

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Kesi Stoneking; [2011]
    Keywords : Mountain Birch; fluctuating asymmetry; Betula pubescens ssp. Czerepanovii; treeline;

    Abstract : The mountain birch ecosystem forms the northern treeline in subarctic Europe. Since the treeline isextremely sensitive to temperature, stress in mountain birch can be used as an indicator of stress onthe ecosystem as a whole, and in predictions of how climate change factors will influence thesubalpine-tundra ecotone and treeline dynamics. READ MORE