Search for dissertations about: "Urtica dioica"

Showing result 1 - 5 of 7 swedish dissertations containing the words Urtica dioica.

  2. 1. Life-history consequenses of host plant choice in the comma butterfly

    Author : Lina Söderlind; Sören Nylin; Niklas Janz; Charles W. Fox; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nymphalidae; voltinism; larval performance; Hopkins’ Host Selection Principle; GeneFishing; real-time qPCR; Urtica dioica; Salix cinerea; Betula pubescens; Ulmus glabra; Ribes uva-crispa.; zoologisk ekologi; Animal Ecology;

    Abstract : There is much evidence that herbivory is a key innovation for the tremendous success of insect. In this thesis I have investigated different aspects of host plant utilization and phenotypic plasticity using the polyphagous comma butterfly, Polygonia c-album. READ MORE

  4. 2. Effect of climate and land use on niche utilization and distribution of nettle-feeding  butterflies

    Author : Hélène Audusseau; Niklas Janz; Sören Nylin; Matthew Forister; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; zoologisk ekologi; Animal Ecology;

    Abstract : Anthropogenic changes in climate and land use are causing a dramatic erosion of biodiversity. To understand this erosion, and predict future transformations of biodiversity, we need to understand better species’ response to these changes at different spatial and temporal scales. READ MORE

  5. 3. Mechanistic aspects of host plant preference in butterflies

    Author : Alexander Schäpers; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; zoologisk ekologi; Animal Ecology; etologi; Ethology; zoologi; Zoology;

    Abstract : Searching and locating resources is essential for survival. In herbivorous insects search behavior is conducted on several scales, requiring input and integration of information from different sensory modalities. READ MORE

  6. 4. Plant colonization of oak plantations - the interactive effects of local environment and land-use history

    Author : Karin Valtinat; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nitrogen mineralization; Phosphorus; Plant ecology; Växtekologi; Soil acidity; Seed sowing; Dispersal limitation; Species diversity; Indicator species analysis; Functional groups; Succession; Understory vegetation; Land-use history; Temperate forest;

    Abstract : In Europe, only small fragments of deciduous woodlands remain intact and species dependent on this ecosystem have declined. In southern Sweden, a shifting trend during the 20th century, with more afforestations on former arable land, resulted in new oak stands. These new stand are either on former arable fields or on continuously forested land. READ MORE

  7. 5. Latitudinal patterns in butterfly life history and host plant choice

    Author : Georg Nygren; Sören Nylin; Mark Scriber; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi;

    Abstract : The central subject in this thesis is adaptation of insect populations to different environments along latitudinal gradients. When latitude decreases, the longer favorable season causes an increase in time available for development. However, predictions are complicated by shifts in voltinism. READ MORE