Sökning: "increased competitive ability"

Visar resultat 6 - 10 av 66 avhandlingar innehållade orden increased competitive ability.

  1. 6. Sexual selection in the collared flycatcher (Ficedula albicollis) : A life-history perspective

    Författare :Anna Qvarnström; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Sexual selection; life-history; honest signalling; fighting ability; genotype-environment interaction; direct benefits; indirect benefits; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

    Sammanfattning : This thesis integrates sexual selection theory with life history theory to elucidate the causes and consequences of variation in a male secondary sexual trait. The model organism, the collared flycatcher (Ficedula albicollis), was studied on Gotland, Sweden. LÄS MER

  3. 7. Colonisation and extinction of vascular plants on islands off the Swedish east coast

    Författare :Anders Löfgren; Lars Ericson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; plants; ecological succession; colonizing ability; population dynamics; grasslands; islands; Sweden; plant ecology; Plant Ecology; växtekologi;

    Sammanfattning : Persistence of species is a function of colonisation and extinction among patches at a regional scale. A decrease in area and an increased isolation of suitable patches may result in a decreased colonisation rate and an increased extinction rate among species. LÄS MER

  4. 8. Avian malaria, life-history trade-offs and interspecific competition in Ficedula flycatchers

    Författare :Katarzyna Kulma; Anna Qvarnström; Marlene Zuk; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Blood parasites; competitive asymmetry; immunocompetence; interspecific competition; life-history trade-offs; MHC; parasite-driven selection;

    Sammanfattning : This thesis investigates the impact of avian malaria (Haemosporidia) parasites on the outcome of interspecific competition between two closely related bird species, pied (Ficedula hypoleuca) and collared (F. albicollis) flycatchers. LÄS MER

  5. 9. Utvärdering av cykelfälts effekter på cyklisters säkerhet och cykelns konkurrenskraft mot bil

    Författare :Annika Nilsson; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mode choice; route choice; bicycle flow; bicycle counts; level of service; attitudes; speed; lateral position; Road transport technology; behavior; Vägtransportteknik; Bicycle traffic; traffic safety; bicycle planning; bicycle lanes;

    Sammanfattning : This work presents an evaluation of bicycle lane effects on cyclist safety and the ability of bicycles to compete with car traffic. Thirteen Swedish urban streets were studied before and after bicycle lanes were introduced. LÄS MER

  7. 10. Aqueous surface chemistry of Goethite : adsorption and desorption reactions involving phosphate and carboxylic acids

    Författare :Malin Lindegren; Per Persson; Staffan Sjöberg; Alan Stone; Umeå universitet; []
    Nyckelord :;

    Sammanfattning : Phosphorus is an essential element for all known forms of life. In the form of phosphate, this nutrient is retained in soils and sediments by sorption on mineral particles, clays and other soil constituents. LÄS MER