Search for dissertations about: "exotic species"

Showing result 1 - 5 of 9 swedish dissertations containing the words exotic species.

  1. 1. The effects of crayfish on interactions in freshwater benthic communities

    University dissertation from Ecology Building, 223 62 Lund, Sweden

    Author : Per Nyström; Lunds universitet.; Lund University.; [1999]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; exotic species; trophic cascades; omnivory; crayfish; Trophic interactions; freshwater; Hydrobiology; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

    Abstract : Popular Abstract in Swedish Kräftors påverkan på födovävar i dammar och sjöar.... READ MORE

  2. 2. Marine seaweed invasions Impacts and biotic resistance in native ecosystems

    University dissertation from Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University

    Author : Josefin Sagerman; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant invasion; exotic species; generalist herbivores; plant-herbivore interactions; enemy-release hypothesis; ecosystem function; Marine Ecotoxicology; marin ekotoxikologi;

    Abstract : Marine seaweeds constitute one of the most productive plant systems known on Earth and a rich fauna including juvenile fish and crustaceans is dependent on the habitats they form. Human influence on marine costal ecosystems has resulted in large scale changes to the abundance and distribution of species, where species introductions constitute an obvious part. READ MORE

  3. 3. Global Changes and European Terrestrial Ecosystems

    University dissertation from Apelsin Publishing

    Author : Emmanuel Gritti; Lunds universitet.; Lund University.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; European species; Climatic risk; pedology; cartography; climatology; Fysisk geografi; geomorphology; Physical geography; Vegetation modelling; Pollen analysis; Plant invasion; geomorfologi; marklära; kartografi; klimatologi; Global Changes;

    Abstract : Global environmental changes are topics of important societal concern and current scientific interest. These changes are driven by many different forcing and feedbacks occurring at various time and geographic scales and are largely influencing the various Earth systems. READ MORE

  4. 4. Extinctions in Ecological Communities direct and indirect effects of perturbation on biodiversity

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Alva Curtsdotter; Linköpings universitet.; Linköpings universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In the dawning of what may become Earth’s 6th mass extinction the topic of this thesis, understanding extinction processes and what determines the magnitude of species loss, has become only too relevant. The number of known extinctions (~850) during the last centuries translates to extinction rates elevated above the background rate, matching those of previous mass extinction events. READ MORE

  5. 5. Collision Induced Fragmentation of Molecules and Molecular Clusters Knockout Driven Reactions in Fullerenes and PAHs

    University dissertation from Stockholm University

    Author : Michael Gatchell; Stockholms universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Abstract : This licentiate thesis covers experimental and theoretical studies of the fragmentation and sub- sequent reactions of fullerenes or Polycyclic Aromatic Hydrocarbons (PAHs). I present results from experiments where atoms or ions collide with fullerenes, PAHs, or clusters of these mole- cules at energies from 100 eV up to tens of keV. READ MORE