Sökning: "Landscape connectivity"

Visar resultat 6 - 10 av 54 avhandlingar innehållade orden Landscape connectivity.

  1. 6. Grassland restoration : Connectivity, plant community change and cows

    Författare :Rozália E. Kapás; Sara Cousins; Adam Kimberley; Lars A. Brudvig; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; biodiversity; colonization; connectivity; dispersal; distance to species pool; diversity; grassland restoration; grassland specialist species; grazing livestock; habitat availability; plant community composition; restoration; semi-natural grassland; species richness; naturgeografi; Physical Geography;

    Sammanfattning : The ecological significance of semi-natural grasslands is high because these habitats provide a home for a diverse flora and fauna and support a range of associated ecosystem services. Due to large-scale land-use changes the extent of grassland habitat has declined. LÄS MER

  3. 7. Harbours and Hinterlands : Landscape, Site Patterns and Coast-Hinterland Interconnections by the Corinthian Gulf, c. 600-300 B.C

    Författare :Anton Bonnier; Gunnel Ekroth; James Roy; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Corinthian Gulf; Archaic and Classical-Early Hellenistic Greece; landscape archaeology; site patterns; settlement patterns; harbours; interconnections; connectivity; coastal zones; trade; mountain economies; pastoralism; Archaeology; classical; Arkeologi; klassisk; antikens kultur och samhällsliv; Classical Archaeology and Ancient History;

    Sammanfattning : The thesis examines interconnections between the Corinthian Gulf and its surrounding hinterlands during the Archaic and Classical-Early Hellenistic period, c. 600 to 300 B.C. Interconnections have been studied through site patterns in the surrounding regions. LÄS MER

  4. 8. The use of highway crossings to maintain landscape connectivity for moose and roe deer

    Författare :Mattias Olsson; Per Widén; Anthony Clevenger; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wildlife crossings; Barrier effect; habitat selection; ecoduct; moose; roe deer; connectivity; conservation; overpass; underpass; highway; exclusion fencing; Biology; Biologi; Biology; Biologi;

    Sammanfattning : Increasingly wildlife managers and land managers are challenged to maintain the viability and connectivity among large mammal populations. Thus, it is important that effective highway crossings are identified and optimized with respect to construction cost, facilitation of ungulate movements, and ability to reduce wildlife-vehicle collisions. LÄS MER

  5. 9. Sensitivity, Variation, and Application of Least-Cost Path Models in Landscape Connectivity Analysis and Corridor Planning

    Författare :Rachel Mundeli Murekatete; Takeshi Shirabe; Gyözö Gidofalvi; Jean Pierre Bizimana; Gerhard Navratil; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Landscape connectivity; Conservation corridor; Stepping stones; Effective distance; Geographic Information Systems; Raster data; Land evaluation; Suitability analysis; Cost surface; Suitability surface; Ordinal scale; Least-cost path; Spatial resolution; Landskapsanslutning; Bevarandekorridor; Stegbräda; Effektivt avstånd; Geografiska informationssystem; Rasterdata; Markutvärdering; Lämplighetsanalys; Kostnadsyta; Lämplighetsyta; Ordinal skala; Lägsta kostnadsväg; Rumslig upplösning; Geoinformatik; Geoinformatics;

    Sammanfattning : In recent decades, Rwanda has been affected by the loss and fragmentation of natural habitats for native species of animals and plants. As a consequence, landscape connectivity—i.e. LÄS MER

  7. 10. Semi-natural grasslands: landscape, history and plant species diversity

    Författare :Lotten Jönsson; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aerial photographs; Land-use history; cadastral maps; habitat continuity; fragmentation; landscape context; habitat connectivity;

    Sammanfattning : This thesis explores the impact of past and present landscape and habitat structure on present levels of vascular plant species diversity within fragmented semi-natural grasslands. Within the Jordtorp-area, a mosaic agricultural landscape on the island of Öland (Sweden), historical land-use changes and the development of semi-natural grasslands was characterized, over a time-period of almost 300 years, using historical maps, aerial photographs and a high-resolution imagery. LÄS MER