Sökning: "herbivore damage"

Visar resultat 6 - 10 av 10 uppsatser innehållade orden herbivore damage.

  1. 6. Induced plant volatiles and their effect onSpodoptera littoralis choice of host plant : oviposition on damaged or undamaged cotton or maize

    Magister-uppsats, SLU/Dept. of Plant Protection Biology

    Författare :Thomas Svensson; [2012]
    Nyckelord :Induced plant volatiles; Spodoptera littoralis; oviposition; cotton; maize; induced defence;

    Sammanfattning : Insects are the main pests of many crops despite many different control measures. There is a need for a better understanding of the factors that affect the relationship between insects and plants. It is important to investigate how insects find and choose their host plants. LÄS MER

  3. 7. BVOC emissions from a subarctic mountain birch : analysis of short term chamber measurements

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

    Författare :Erik Ahlberg; [2011]
    Nyckelord :fjällbjörk; flyktiga kolföreningar; geografi; naturgeografi; BVOC; mountain birch; volatile organic compounds; physical geography; geography; Earth and Environmental Sciences;

    Sammanfattning : Flyktiga organiska föreningar som släpps ut från växter (BVOC- Biogenic volatile organic compounds) kan ha en stor påverkan på atmosfärisk kemi genom reaktioner som leder till ökad eller minskad ozonproduktion, och genom att de kan vara ett förstadium till aerosoler. De vanligaste flyktiga organiska föreningarna är isopren (2-metyl, 1,3-butadien) och dess derivat, terpener och terpenoider (isoprenoider). LÄS MER

  4. 8. The importance of litter for interactions between terrestrial plants and invertebrates

    Magister-uppsats, Institutionen för ekologi, miljö och geovetenskap

    Författare :Maria Gelfgren; [2010]
    Nyckelord :;

    Sammanfattning : According to the exploitation ecosystem hypothesis (EEH), terrestrial ecosystems are characterized by well defined trophic levels and strong trophic interactions with community level tropic cascades. In unproductive terrestrial habitats as tundra heaths, the energy shunt from litter and apparent competition between herbivores and detritivores are expected to be important for the structure and dynamics of the invertebrate community. LÄS MER

  5. 9. Forage production and summer use by ungulates on game fields and surrounding areas

    Magister-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Lovisa Nilsson; [2009]
    Nyckelord :browsing; damage; game fields; forage availability; ungulates;

    Sammanfattning : Ungulates are causing conflicts between stakeholders due to browsing damage on forests and agricultural crops. At the same time there is a big demand of keeping high ungulate densities for sports hunting and recreational purposes. Movement patterns of ungulates are strongly correlated with forage availability. LÄS MER

  7. 10. Naturvårdande skötsel (NS) - blir resultatet som man tänkt sig? : en fältstudie över föryngring, trädslagsfördelning och död ved 14 år efter åtgärd

    L3-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Anna Högdahl; [2008]
    Nyckelord :naturvårdande skötsel; naturvärden; betes- och odlingsmarker; inväxning; återskapa; restaurera;

    Sammanfattning : A new Swedish political approach to forestry was initiated 1993, that put goals of production and environmental issues into equal importance to Swedish Forestry Law. Earlier nature conservation very often declaimed preservation the best way to conserve nature, but recently it is clear that many highly biological values are due to former land use or disturbance. LÄS MER