Essays about: "tremula"

Showing result 1 - 5 of 33 essays containing the word tremula.

  1. 1. Saproxylic beetles in Populus tremula fauna depots - how do you construct the best depot?

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Simon Selberg; [2019]
    Keywords : aspen; populus; tremula; saproxylic; beetle; fauna; depot; species; richness; abundance; diversity; cwd; course; woody; debris; forest; asp; populus; tremula; vedlevande; skalbagge; fauna; depå; art; mångfald; diversitet; död; ved; cwd; skog;

    Abstract : The biodiversity of saproxylic organisms and in the case of this study, saproxylic beetles, is dependent on the amount and quality of course woody debris (CWD) in the environment. Over the past decades the quantity of CWD in Swedish forests has increased, yet the quality has decreased, forests are managed and exploited, and old-growth forests are rarer. READ MORE

  2. 2. Maskinell ringbarkning - effektiv metod för att reducera uppslag av asp i föryngringen

    University essay from SLU/School for Forest Management

    Author : Jakob Rehult; [2019]
    Keywords : rotskott; högstubbe; knäckesjuka;

    Abstract : Pine twisting rust (Melampsora pinitorqua) often affects young Scots pine (Pinus sylvestris) plants and causes quality and growth reductions. The attacks have negative economic consequences in commercial forestry. The alternate host for Pine twisting rust is Aspen (Populus tremula). READ MORE

  3. 3. The relative importance of beavers (Castor fiber) and browsers on the recruitment of broad-leaved trees in riparian areas

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Matilda Karlsson; [2019]
    Keywords : beaver; Castor fiber; ungulates; herbivory; broad-leaved; riparian; conservation management;

    Abstract : Managed forest landscapes in Sweden are dominated by boreal coniferous forest and are deficient in broad-leaved trees. Both beavers (Castor fiber) and ungulate browsers prefer broad-leaved trees to conifers, and the interaction between multiple herbivores may have a considerable impact on the recruitment of deciduous trees in riparian areas. READ MORE

  4. 4. Evolutionary history and local adaptation in Scottish populations of Populus tremula

    University essay from SLU/Dept. Of Plant Biology

    Author : Jonathan R. Wilson; [2019]
    Keywords : local adaptation; population structure; selective sweep; synteny;

    Abstract : From a subset of P. tremula samples taken from across Europe and China, principal component analysis of genetic variation indicated population structure in the Scottish population compared with the rest of Eurasia. READ MORE

  5. 5. Characteristics assessment of aspen logs used in the production of matches

    University essay from Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Author : Joseph Adejo Umoru; [2018]
    Keywords : Non-destructive technique; resonance; stiffness; aspen; moisture content; basic density; cross sectional diameter area; bark width; grain angle; taper; sound velocity;

    Abstract : Aspen (Populus tremula L.) accounts for about 2% of the total wood stock in Sweden. Sawmills use only a small part (about 5,000 m³fub) of round wood aspen per year. Since there are no Swedish gradings and design values for aspen, no aspen is used for structural purposes. READ MORE