Sökning: "zoologisk ekologi"

Visar resultat 16 - 20 av 57 avhandlingar innehållade orden zoologisk ekologi.

  1. 16. Nesting ecology of the grass snake (Natrix natrix) and its implications for conservation

    Författare :Kristin Löwenborg Di Marino; Mattias Hagman; Sören Nylin; Tobias Uller; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; agriculture; anthropogenic; climate; embryonic development; incubation; zoologisk ekologi; Animal Ecology;

    Sammanfattning : The onset of agriculture about 12,000 years ago has had a major influence on the biodiversity of plants and animals. Unfortunately, the rapid changes in agricultural practices that has occurred in recent times has negatively affected many farmland species. LÄS MER

  3. 17. Survival in a small and endangered arctic fox (Vulpes lagopus) population

    Författare :Tomas Meijer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ethology and behavioural ecology; Etologi och beteendeekologi; Animal Ecology; zoologisk ekologi;

    Sammanfattning : .... LÄS MER

  4. 18. Antipredator defence in butterflies

    Författare :Martin Olofsson; Christer Wiklund; Graeme Ruxton; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Antipredator defence; Bird; Crypsis; Predator; Predator-prey interaction; Prey-attack behavior; Butterfly; Deimatic behavior; Eyespots; Startle display; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Predation exerts a potent selection mechanism and has resulted in a suite of antipredation adaptations encompassing morphological and behavioral traits in prey. In butterflies, several such traits appear to be directed towards birds which are considered as one of their major predators. LÄS MER

  5. 19. Anthropogenic impact on predator guilds and ecosystem processes : Apex predator extinctions, land use and climate change

    Författare :Marianne Pasanen Mortensen; Bodil Elmhagen; Francisco Palomares; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mesopredators; apex predators; top-down; bottom-up; interspecific killing; red fox; Eurasian lynx; grey wolf; wolverine; productivity; winter severity; cropland; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Humans affect ecosystems by changing species compositions, landscape and climate. This thesis aims to increase our understanding of anthropogenic effects on mesopredator abundance due to changes in apex predator status, landscape and climate. LÄS MER

  7. 20. Evolutionary and mechanistic aspects of insect host plant preference

    Författare :Alexander Schäpers; Niklas Janz; Steven Heard; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; host plant choice; host range; diet breadth; butterfly; oviposition; specialist; generalist; insect-plant interaction; search behavior; olfaction; decision making; evolution; parasite-host interaction; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Plant feeding insects comprise about 25% of all animal species on earth and play an important role in all ecosystems. Although we understand that their association with plants is a key-factor driving the diversification in this group, we still have large gaps in our knowledge of the underlying processes of this relationship. LÄS MER