Sökning: "spatial distributions"

Visar resultat 21 - 25 av 205 avhandlingar innehållade orden spatial distributions.

  1. 21. The role of microclimate for the performance and distribution of forest plants

    Författare :C. Johan Dahlberg; Kristoffer Hylander; Johan Ehrlén; Jason D. Fridley; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; performance; microclimate; spatial scales; continental; landscape; distribution patterns; distribution limits; phenology; vegetative development; reproductive development; vital rates; population growth rate; vascular plants; bryophytes; distribution modelling; Plant Ecology; växtekologi;

    Sammanfattning : Microclimatic gradients may have large influence on individual vital rates and population growth rates of species, and limit their distributions. Therefore, I focused on the influence of microclimate on individual performance and distribution of species. LÄS MER

  3. 22. Winter browsing by moose and hares in subarctic birch forest : Scale dependency and responses to food addition

    Författare :Sara Öhmark; Thomas Palo; Glenn R. Iason; Bengt-Gunnar Jonsson; Lisa Shipley; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Herbivory; subarctic; hare; moose; spatial scale;

    Sammanfattning : Despite their difference in body size and morphology, the moose (Alces alces) andthe mountain hare (Lepus timidus) sustain themselves during winter on similar plantspecies and plant parts in in subarctic environments, namely apical twigs ofmountain birch (Betula pubescens ssp. czerepanovii). LÄS MER

  4. 23. Networks of urban interaction - Growth and centrality in the complex geography of urban activity

    Författare :Alexander Hellervik; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; accessibility; power law; urban activity; centrality; urban growth; transport infrastructure; spatial interaction; complex networks; Zipf’s law;

    Sammanfattning : How cities and regions grow and decline depend on technological, social and economic factors. Understanding the interplay of these forces is central in research efforts aiming to improve urban and transport planning. LÄS MER

  5. 24. URBAN SEGREGATION AND URBAN FORM : From residential segregation to segregation in public space

    Författare :Ann Legeby; Lars Marcus; Eva Öresjö; Anna-Johanna Klasander; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urban segregation; urban form; urban design; housing segregation; residential segregation; public space; co-presence; public life; spatial affordance; Architecture; Arkitektur;

    Sammanfattning : Urban segregation is considered a major social problem in Sweden and several national anti-segregation initiatives have been launched to decrease social and ethnic segregation but so far only with marginal effects (SOU 2005:29). Urban design and town planning are rarely the focus in national anti-segregation initiatives; the architectural issue has mainly been confined to matters concerning housing policies. LÄS MER

  7. 25. Responses of boreal forest understory plant communities to climate and forestry

    Författare :Ditte Marie Christiansen; Kristoffer Hylander; Johan Ehrlén; Signe Normand; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boreal forests; bryophytes; climate; climate change; community temperature index; demography; forest management; microclimate; plants; species interactions; species distributions; time-lags; transplant experiment; understory communities; Ecology and Evolution; ekologi och evolution;

    Sammanfattning : A warming climate is altering species distributions and community compositions. To understand and predict changes in species distributions to climate change, we often use species occurrences together with large-scale regional climate data. This can be problematic for several reasons. LÄS MER