Essays about: "Quercus sp."

Found 4 essays containing the words Quercus sp..

  1. 1. Elemental variability in tree-rings as indicator for climate change : a case study on beech and oak trees at the Laacher See, Germany

    University essay from Stockholms universitet/Institutionen för naturgeografi

    Author : Ann-Kathrin Wild; [2022]
    Keywords : trace elements; tree-rings; dendrochemistry; dendroclimatology; ITRAX; Laacher See; mofettes; tree-bark; Quercus sp.; Fagus sp.;

    Abstract : The aim of this study was to contribute to the comprehension of the connection of element uptake in trees at the Laacher See in Germany and climatic parameters on different time scales. Understanding the relationship of certain elements in trees and temperature might enable the assignment of extraordinary high peaks in the elemental concentration, which cannot be explained by temperature, to another process as CO2 degassing of the mofettes, which are relics of the volcanic past of the lake. READ MORE

  3. 2. Pheromone-based monitoring of Elater ferrugineus as an indicator for species-rich hollow oak stands

    University essay from SLU/Plant Breeding and Biotechnology (until 121231)

    Author : Klas Andersson; [2012]
    Keywords : Elater ferrugineus; Osmoderma eremita ; saproxylic; indicator ; Quercus sp. ; pheromones; conservation;

    Abstract : The rare beetle Elater ferrugineus was sampled at 47 sites in the county of Östergötland, Sweden by means of pheromone-baited traps to assess its value as an indicator species for hollow oak stands rich in rare saproxylic beetle species. In addition Osmoderma eremita was sampled with the same method. READ MORE

  4. 3. The importance of undergrowth vegetation and browsing pattern on oak seedlings

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Mariama Mattila; [2010]
    Keywords : oak; seedling; browsing; undergrowth vegetation;

    Abstract : This 30 ECTS master thesis aim was to investigate how the species composition andstructures in the understorey vegetation community affects oak seedling browsing risk,frequency and severity.The study was conducted in 10 mixed broadleaved forests in Southern Sweden. READ MORE

  5. 4. Are trees on islands more exposed to lightning-strokes than trees at mainland?

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Susanne Ahlander; [2007]
    Keywords : lightning strikes; lightning scars; islands; pinus sylvestris; quercus robur; betula sp.;

    Abstract : All vegetation is subject to different kinds of disturbances. Before human intervention, lightning strikes were the principal natural cause of ignition in conifer dominated European forests (Gromtsev 2002; Granström 2001). READ MORE