Sökning: "tremula"

Visar resultat 1 - 5 av 38 uppsatser innehållade ordet tremula.

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

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Simon Selberg; [2019]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

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

    Kandidat-uppsats, SLU/School for Forest Management

    Författare :Jakob Rehult; [2019]
    Nyckelord :rotskott; högstubbe; knäckesjuka;

    Sammanfattning : 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). LÄS MER

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

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

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

    Sammanfattning : 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. LÄS MER

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

    Master-uppsats, SLU/Dept. Of Plant Biology

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

    Sammanfattning : 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. LÄS MER

  5. 5. Strukturella förändringar i Östergötlands skogar : En jämförelse mellan år 1927 och 1983–2017

    Kandidat-uppsats, Linköpings universitet/Biologi

    Författare :Tilda Lindkvist; [2018]
    Nyckelord :Tree growth; tree species distribution; forest inventory; historic data; Swedish NFI; forestry;

    Sammanfattning : Humans have affected the Swedish forests for a long time, mainly through agriculture and forestry. Since the beginning of the 20th century, a lot of changes have taken place in forest policy, which have affected the structures of our forests, such as tree age, size and species distributions. LÄS MER