Sökning: "betula pendula"

Visar resultat 1 - 5 av 41 uppsatser innehållade orden betula pendula.

  1. 1. The intraspecific drought tolerance of Betula pendula Roth. : ecotypic aptitude as tree selection criteria for the urban landscape

    Master-uppsats, SLU/Department of Plant Breeding (from 130101)

    Författare :Simon Hannus; [2021]
    Nyckelord :Betula pendula; clinal variation; drought tolerance; ecosystem services; ecotypes; potential evapotranspiration; turgor loss point; urban forestry; urban resilience; urban tree selection;

    Sammanfattning : The ecosystem services provided by urban trees are substantial contributors to the quality of urban living, and their environmentally regulating capabilities are increasingly regarded as integral in order to efficiently secure urban resilience, by ameliorating the human and material impacts of extreme weather events. However, current trends of urban development presents challenges of how to preserve urban greenery ecosystem functioning, particularly in light of the ongoing climate change; which also has brought forth the importance of taxonomically diverse urban forests, to mitigate risks of catastrophic tree loss associated with these conditions. LÄS MER

  2. 2. Poplar for biodiversity? : comparison of lichen communities in stands of Balsam poplar, Hybrid larch, Silver birch and Norway spruce

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Ewa Zuzanna Jastrzebska; [2020]
    Nyckelord :Poplar; Populus trichocarpa; lichen; biodiversity; epiphytic lichen; Norway spruce; Hybrid larch; Silver birch; Sweden;

    Sammanfattning : Due to increasing interest in the use of non-native tree species, more knowledge is needed concerning their effects on biodiversity. In this context, epiphytic lichens were investigated in two stands of non-native tree species (Larix×eurolepis and Populus trichocarpa) and two stands of native tree species (Picea abies and Betula pendula) in a field experiment in southern Sweden. LÄS MER

  3. 3. Produktionsjämförelse av genetiskt förädlad vårtbjörk med finskt och svenskt ursprung

    Kandidat-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Pelle Eriksson; Carl Åhlund; [2020]
    Nyckelord :Betula pendula; Finland; plusträd; kvalitet; tillväxt;

    Sammanfattning : Genetisk förädling av ett trädslag innebär förbättring av tillväxtegenskaper och förbättring av kvalitén, det kan även leda till bättre anpassning till miljön vilket är viktigt då klimatet ändras. I Sverige har förädlingen av barrträd lett till högre avkastning av skogsproduktion, men för björk finns endast förädlat material från ett första generationens plantage i södra Sverige. LÄS MER

  4. 4. Thinning strategies of birch in Latvia, with application in a newly established field experiment

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Dagnija Saicane; [2019]
    Nyckelord :silver birch; abandoned agriculture land; thinning; pruning; design;

    Sammanfattning : Birch (Betula pendula Roth) is an early successional species which, if grown in suitable soils with wise management, can have high and valuable production. Large-dimension birch-wood is used for saw logs and plywood production, but smaller ones for pulpwood and energy wood. LÄS MER

  5. 5. Tree species classification with YOLOv3 : Classification of Silver Birch (Betula pendula) and Scots Pine (Pinus sylvestris)

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Samuel Norling; [2019]
    Nyckelord :;

    Sammanfattning : Automation of tree species classification during a forest inventory could potentially provide more efficiency and better results for forest companies and stakeholding agencies. This thesis investigates how well a state of the art object detection system, YOLOv3, performs this classification task. LÄS MER