Sökning: "shrub encroachment"

Hittade 5 uppsatser innehållade orden shrub encroachment.

  1. 1. Looking for shrubs in an alvar: Investigating classification of orthophotos as a way of mapping shrub species Juniperus communis and Dasiphora fruticose on Stora Alvaret, Öland

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap; Lunds universitet/Lantmäteri (CI)

    Författare :Jorun Westman; [2022]
    Nyckelord :Physical Geography; Orthophoto; Stora Alvaret; Shrub; Monitoring; Earth and Environmental Sciences; Technology and Engineering;

    Sammanfattning : Loss of biodiversity is an immediate threat to the planet and if no actions are taken it is expected to accelerate. The highest species richness on smaller scale is found in semi-natural temperate grasslands, with one of the documented records from Stora Alvaret on Öland, Sweden. LÄS MER

  3. 2. Remotely sensed estimation of shrub encroachment : a case study on the Great Alvar, Öland, Sweden

    Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Franziska Weichert; [2018]
    Nyckelord :Great Alvar; shrub encroachment; species richness; growth rate; Earth and Environmental Sciences;

    Sammanfattning : The increase of shrub extent in arid and semi-arid environments is reducing the species richness all over the globe. This process of shrub encroachment was found to result from changes in anthropogenic land use, especially from too high or too low grazing intensity. LÄS MER

  4. 3. Grazing impacts on savanna vegetation states and its role in albedo changes

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Joana Fernandes; [2018]
    Nyckelord :albedo; grazing; grazing lawn; white rhino; shrub encroachment; Hluhluwe-iMfolozi;

    Sammanfattning : Albedo, i.e., the fraction of the incoming sunlight that a surface reflects, has been previously shown to play a key role on the climate system by influencing the energy balance of the Earth’s ecosystems. LÄS MER

  5. 4. Grazing increases albedo of savanna grasslands

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Linda Vedin; [2017]
    Nyckelord :albedo; grazing; savanna grassland; grazing lawn; shrub; Hluhluwe-iMfolozi;

    Sammanfattning : Earlier studies done in the north have shown that grazing increases surface albedo by reducing shrub height and abundance, and thus have the potential to cool down the local climate. But what about effect of grazing in other systems? In African savanna grasslands some grazers are able to transform grass swards into a lawn-like state by regular grazing. LÄS MER

  7. 5. Kan man genom kartstudier förutse häckningsframgång för ängshök (Circus pygargus) i Uppland?

    L3-uppsats, SLU/Dept. of Ecology

    Författare :Fredrik Litsgård; [2008]
    Nyckelord :ängshök; häckningsframgång; häckningshabitat; födohabitat;

    Sammanfattning : Montagu´s harrier (Circus pygargus) is a diurnal, Eurasian raptor, which migrates from its northern breeding grounds to winter in sub-Saharan Africa. In Sweden, its core breeding area is centred on the island of Öland, with a stable breeding population of approximately 40 pairs. LÄS MER