Search for dissertations about: "bark beetle"
Showing result 1 - 5 of 19 swedish dissertations containing the words bark beetle.
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1. Increased resilience in managed boreal forests : Controlling damage by spruce bark beetle and moose in Sweden
Abstract : Most of the forests growing in Europe today have been planted, or heavily affected, by humans. This is because the forest industry provides crucial raw materials for diverse products, including timber, pulp and paper, cellulose-based substances and renewable energy sources. READ MORE
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2. Conifer chemical defense : Rugulation of bark beetle colonization and pheromone emission
Abstract : Terpenes and phenols are of importance in conifer defense against insects and pathogens. Knowledge about tree chemical defense is vital for developing practical methods to maintain healthy forests. READ MORE
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3. Inferring Land Use from Remote Sensing Imagery : A context-based approach
Abstract : This doctoral thesis investigates the potential of classification methods based on spatial context to infer specific forms of land use from remote sensing data. The problem is that some types of land use are characterized by a complex configuration of land covers that traditional per-pixel based methods have problems classifying due to spectral heterogeneity. READ MORE
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4. Olfaction in the spruce bark beetle, Ips typographus : receptor, neuron and habitat
Abstract : The bark beetle Ips typographus regularly kills spruce trees in the Palearctic. Spruces are colonized by means of attraction to an aggregation pheromone. Attraction is modulated by anti-attractive volatiles (NHV) from non-host plants. In this thesis, olfaction in I. READ MORE
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5. Outbreak dynamics of the spruce bark beetle Ips typographus in time and space
Abstract : The European spruce bark beetle Ips typographus (L.) is one of the most important pests of mature Norway spruce Picea abies (Karst.) in Europe. Outbreaks (periods with large-scale beetle-caused tree mortality) are often triggered by large-scale stormfellings or drought, which provide a large surplus of suitable breeding material. READ MORE