Sökning: "Dryas"

Visar resultat 1 - 5 av 20 uppsatser innehållade ordet Dryas.

  1. 1. The bzzzt of frirends. Interspecific competition in Arctic plants for pollination services.

    Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Malin Olsson; [2023-06-27]
    Nyckelord :the Arctic; pollinator networks; competition; autonomous selfing; Arktis; pollinationsnätverk; konkurrens; autonom självpollinering;

    Sammanfattning : The Arctic has a harsh environment that is challenging for the flora and fauna that inhabits the region. The ruling abiotic factors of the region results is a low species richness that creates a potential challenge for the region’s plant species. LÄS MER

  3. 2. Födovalspreferenser hos en arktisk specialist : vad föredrar Gynaephora groenlandica (Lepidoptera:Erebidae) att äta på Wrangelön?

    Kandidat-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Beatrice Elfvenfjärd; Erika Åmansson; [2022]
    Nyckelord :Gynaephora groenlandica; arktisk ullbjörnslarv; födopreferenser; arktisk tundra; arktisk specialist; växtegenskaper;

    Sammanfattning : The Arctic tundra has many unexplored areas. Due to the harsh climate and the difficult accessibility, there is a lack of knowledge about the different species that live under these circumstances. Herbivores in this environment have a large effect on the plant community, one of these is the moth butterfly larva Gynaephora groenlandica. LÄS MER

  4. 3. Åsars bildning och modellering av isälvar under äldre och yngre Dryas i Svealand

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Emilie Åström; [2020]
    Nyckelord :esker; channel ice stream; Weichsel; Dryas; flow accumulation; Svealand; åsar; isälvar; Weichsel; Dryas; flödesackumulation; Svealand;

    Sammanfattning : Sveriges geomorfologi har till största del bildats under den senaste glaciationens erosion och depositions processer. Vid denna glaciations avsmältning rann smältvattnet bort från glaciären i isälvarna genom tunnlar under inlandsisen. LÄS MER

  5. 4. Impactites from the Hiawatha crater, North-West Greenland

    Master-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

    Författare :Jacob Gustafsson; [2020]
    Nyckelord :Hiawatha; impact crater; Cape York; Baffin Bay; Greenland Ice Sheet; Younger Dryas; meteorite; impactite; organic carbon; conifer; vitrinite reflectance; Ro; cellular texture; chromite; chromium isotope; toasted quartz; ballen quartz; melted carbonate; granular zircon; planar deformation feature;

    Sammanfattning : The recent discovery of the 31-km-wide Hiawatha impact crater has raised unanswered questions about its age, impactor and highly unusual organic carbon component. Previous research suggests a fractionated iron meteorite impactor, a probable maximum 3–2.4 Ma impact age and a possible Younger Dryas impact age. LÄS MER

  7. 5. Reforestation in the far north : comparing effects of the native tree species Betula pubescens and the non-native Pinus contorta in Iceland

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

    Författare :Elin Fries; [2017]
    Nyckelord :Iceland; non-native tree species; understory vegetation; P. contorta; B. pubescens;

    Sammanfattning : The use of non-native tree species in forestry is both praised and questioned. Foresters have often promoted their use, mainly because of higher growth rates, resilience to pests and diseases and improved survival under harsh conditions. LÄS MER