Sökning: "urban trees"

Visar resultat 11 - 15 av 27 avhandlingar innehållade orden urban trees.

  1. 11. Outdoor heat in urban areas - Model development and applications

    Författare :Nils Wallenberg; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mean radiant temperature; Urban Climate; SOLWEIG; Outdoor Thermal Comfort;

    Sammanfattning : Heat waves and high outdoor air temperature can lead to heat stress with negative implications for human health and wellbeing such as heat stroke, heat cramps, dehydration and in extreme cases death. The urban population is at higher risk of such outcomes because of the generally warmer urban climate. LÄS MER

  3. 12. Understanding the urban ecosystem : interactions between plants, animals, and people

    Författare :Johan Kjellberg Jensen; Evolutionär ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; air pollution; avian physiology; fatty acids; human-nature interactions; nature connection; non-native plants; nutrition; trophic interactions; urban ecology; urbanization; air pollution; avian physiology; fatty acids; human-nature interactions; nature connection; non-native plants; nutrition; trophic interactions; urban ecology; urbanization;

    Sammanfattning : Cities are the pinnacle of human change to the environment, creating unique types of ecosystems which present many challenges to local organisms: habitat fragmentation, introduced species, and various pollutants. Being crucibles of anthropogenic effects, urban ecosystems offer opportunities to understand how humans impact nature. LÄS MER

  4. 13. Management of urban woodlands - effects on bird communities and recreational values

    Författare :Erik Heyman; Göteborgs universitet; []
    Nyckelord :Forest management; Urban woodlands; Birds; Recreation; Clearance; Understory;

    Sammanfattning : The ongoing urbanisation increases the pressure on urban nature. Urban woodlands are receiving growing attention as they provide valuable ecosystem services to urban citizens, mainly by providing areas for recreation but also through improving air quality and reducing noise. LÄS MER

  5. 14. Inferring Land Use from Remote Sensing Imagery : A context-based approach

    Författare :Michael Meinild Nielsen; Bo Malmberg; Anders Wästfelt; Douglas A. Stow; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; land use; remote sensing; urban remote sensing; image analysis; segmentation; spatial context; land cover; land cover configuration; farming types; bark beetle; dead trees; forest inventory; kulturgeografi; Human Geography;

    Sammanfattning : This doctoral thesis investigates the potential of classification methods based on spatial context to infer specific forms of land use from remote sensing data. The problem is that some types of land use are characterized by a complex configuration of land covers that traditional per-pixel based methods have problems classifying due to spectral heterogeneity. LÄS MER

  7. 15. Residential urban forest assessment methodologies : a management perspective

    Författare :Blaz Klobucar; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Many urban trees are located on private property in residential areas, but these trees are infrequently included in urban forest strategies and plans, meaning that for most local governments, the complete urban residential tree population, its potential for supplying ecosystem services and its dynamics are unknown.This thesis examined the assessment methodologies of ecosystem services provided by trees in the attempt to provide valuable information about residential trees. LÄS MER