Sökning: "extinction debt"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden extinction debt.

  1. 1. Effects of past fragmentation and habitat loss and current management methods on the changes in vascular plant communities. : An evaluation of extinction debt in semi-natural grasslands in Sweden

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Adina Sennblad; [2021]
    Nyckelord :;

    Sammanfattning : Habitat loss and fragmentation are believed to be two of the main reasons for high extinction rates of species, resulting in decreased biodiversity. According to the island biogeography theory, the species richness in a patch, here a semi-natural grassland, is dependent on the landscape composition, and therefore changes in the landscape composition will result in changes in the species richness of the grassland. LÄS MER

  3. 2. All scales matter : effects on the landscape-, stand-, substrate- and temporal scale on occurrence of two deadwood living microlichens

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Edith Bremer; [2021]
    Nyckelord :extinction debt; deadwood; microlichens; continuity forest; landscape structure;

    Sammanfattning : Understanding extinction debt and how species are affected by landscape structure is important knowledge in order to form strategies for species protection in forestry and conservation. In this study, I investigate whether an extinction debt can be detected in two deadwood living lichen species by modelling their occurrence against past and present habitat amount in the landscape as well as amount of continuity forest (i. LÄS MER

  4. 3. Eneskogen i Anderstorp : en studie om Juniperus communis föryngringsproblematik

    Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Linn Jonsson; [2017]
    Nyckelord :Enefälad; föryngring; en; könsfördelning; enbär; årsringsanalys; enbestånd; utdöendeskuld;

    Sammanfattning : Eneskogen ligger i Anderstorp, Klippans kommun i Skåne. Platsen är cirka 6ha och domineras av ett stort enbestånd där många individer är gamla, vissa med en höjd på 14 meter. Tyvärr har stora delar av beståndet försämrad vitalitet, vilket har lett till att under de senaste 15 åren har många träd knäckts på mitten och dött. LÄS MER

  5. 4. Deforestation patterns and hummingbird diversity in the Amazon rainforest

    Kandidat-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Felicia Labor; [2016]
    Nyckelord :Landscape fragmentation; deforestation; extinction debt; hummingbirds; biodiversity database; spatial landscape analysis; the Amazon rainforest; land-cover change.;

    Sammanfattning : In recent decades expanding land-use change has caused extensive deforestation of the tropical rainforestinducing large-scale transformation of the landscape patterns across the South American continent. Landscapechange is a modification process of the natural forest cover into fragments which generate various ecologicalimpacts. LÄS MER

  7. 5. The link between the incurrence of customs debt and VAT - and the consequences and impact thereof

    Magister-uppsats, Lunds universitet/Institutionen för handelsrätt

    Författare :Ossama Shaaban; [2015]
    Nyckelord :import VAT; customs debt; custom duties; principle of fiscal neutrality; the right to deduct; illegal goods; unlawful introduction of goods; stolen goods; CCC; UCC; Law and Political Science;

    Sammanfattning : The link between the incurrence of a customs debt and the incurrence of the Value Added Tax on importation, have a parallel nature, as they arise from the importation of goods into the territory of the Community. This link is a result of Article 71 (1) of the VAT Directive. LÄS MER