Essays about: "populationsdynamik"

Showing result 1 - 5 of 7 essays containing the word populationsdynamik.

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

    University essay from SLU/Dept. of Ecology

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

    Abstract : 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. READ MORE

  3. 2. Storleksstrukturerad konkurrens vid hummertinor

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Joanna Haffling; [2023]
    Keywords : europeisk hummer; konkurrens; dominansbeteende; BORIS; MPA;

    Abstract : De flesta arter med ett kommersiellt värde i våra hav hotas idag av ett överfiske. Ett sätt att säkerställa målarternas överlevnad är genom en hållbar fiskeriförvaltning och populationsövervakning. READ MORE

  4. 3. Well-posedness of a class of continuity equations posed in the space of time-dependent Radon measures

    University essay from Karlstads universitet/Institutionen för matematik och datavetenskap (from 2013)

    Author : Erik Lieback; [2022]
    Keywords : Measure solutions; Population dynamics;

    Abstract : We consider a class of partial differential equations whose solutions are elements of a space of measures. The motivation for modeling with measures is that sometimes selection-mutation models or models of for example population dynamics or opinion-formation are designed to describe not functions, but rather evolving distributions which can be described by measures. READ MORE

  5. 4. Pärlugglebeläggning i förhållande till sorktillgång över en klimat-och landskapsgradient

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Petra Landström; [2020]
    Keywords : pärluggla; skogssork; gråsiding; åkersork; populationsdynamik;

    Abstract : Smådäggdjur har inventerats i Västerbottens län sedan 1971. Inventeringen genererar bakgrundsdata över populationsdynamik hos smådäggdjur, vilket används för tolkning av populationsförändringar i kringliggande trofiska nivåer. READ MORE

  6. 5. Simulation of rattan harvests in Indonesia : different harvesting pressures and the resulting patterns

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Bastian Hess; [2013]
    Keywords : Calamus zollingeri; harvesting strategies; Non-Timber Forest Products NTFP ; Modelling; Individual based model IBM ; Rattan; Sustainability; Sulawesi; Indonesia;

    Abstract : The objectives of this research were to determine whether the natural rattan resources in Sulawesi, Indonesia can cope with the strongly increased harvesting pressure that has occurred over the last centuries. I was furthermore looking for patterns in the rattan population dynamics that might give a hint on how the harvesting system could be improved to ensure a maximum sustainable yield. READ MORE