Sökning: "tree bark"

Visar resultat 1 - 5 av 94 uppsatser innehållade orden tree bark.

  1. 1. Exploring patterns in risk factors for bark beetle attack during outbreaks triggered by drought stress with harvester data on attacked trees: A case study in Southeastern Sweden

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Nikolaos Kouskoulis; [2023]
    Nyckelord :Geography; GIS; Geographic Information Science; Forest ecosystems; Bark beetle outbreak; Southeastern Sweden; Predisposing factors; Triggering factors; Drought stress; Earth and Environmental Sciences;

    Sammanfattning : ABSTRACT Raising temperatures and climate variability have intensified extreme weather events worldwide. These extremes can enhance and trigger possible pest outbreaks. Bark beetle attacks have become a major concern in regions with extensive spruce forest areas. Southeastern Sweden has faced repeated outbreaks resulting in widespread tree loss. LÄS MER

  3. 2. Scots pine (Pinus sylvestris L.) morphological variation in the Massif Central region, France. : A study of differences in traits between populations.

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Amanda Johansson; [2023]
    Nyckelord :;

    Sammanfattning : Scots Pine (P. sylvestris L.) has one of the largest distributions among trees in Eurasia. It is important both economically and ecologically, with a dominant role in forests ecosystems. LÄS MER

  4. 3. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Evelina Andersson; [2023]
    Nyckelord :spruce bark beetle; population dynamics; conservation areas; biodiversity; natural enemies; species richness; managed forests; woodland key-habitats; nature reserves;

    Sammanfattning : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. LÄS MER

  5. 4. Hur påverkar viltskador ett framtida granbestånd? : en studie av en försöksyta på Asa försökspark

    Kandidat-uppsats, SLU/School for Forest Management

    Författare :Daniel Ridderbjelke; Gustav Forslund; [2023]
    Nyckelord :viltbetning; gran; kvalitetsfel;

    Sammanfattning : Ett omfattande problem i det svenska skogsbruket är de skador som klövviltet orsakar på ungskog. Den vanligaste uppfattningen i det svenska skogsbruket är att granen inte påverkas mycket av viltskador trots att den anses vara härdigare än exempelvis tall och vissa lövträd. LÄS MER

  7. 5. Improving Pith Detection and Automated Log Identification using AI

    Master-uppsats, Linnéuniversitetet/Institutionen för datavetenskap och medieteknik (DM)

    Författare :Muhammad Farooq; [2023]
    Nyckelord :Automated wood log identification; damaged log identification; pith detection; artificial intelligence; computer vision; machine learning; deep learning;

    Sammanfattning : Tracking of tree logs from a harvesting site to its processing site is a legal requirement for timber-based industries. Wood log identification is an important task in the forestry industry and has traditionally relied on manual inspection by trained experts. LÄS MER