Sökning: "Mountain Birch"

Visar resultat 1 - 5 av 26 uppsatser innehållade orden Mountain Birch.

  1. 1. Småbrukarkultur i björkskogsregionen : historiska bilder från Jämtlands län

    Kandidat-uppsats, Göteborgs universitet/Institutionen för kulturvård

    Författare :Catalina Valencia Gallego; [2023-04-20]
    Nyckelord :Smallholder culture; birch forest region; mountain birch forest; pastoral farming; photography; fences; buildings; Småbrukarkultur; björkskogsregion; fjällbjörkskog; fäboddrift; fotografi; hägnader; byggnader;

    Sammanfattning : In the Swedish mountains there are three different vegetation zones, the prealpine, subalpine and bare mountain. Between the prealpine zone, where the coniferous forest ends, and the bare mountain, there is the subalpine zone, or birch forest region. LÄS MER

  3. 2. Trends in mountain birch seed abundance and its relation to temperature and moth abundance: a ten-year study from Swedish Lapland

    Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Författare :Frida Gustafsson; [2023-02-09]
    Nyckelord :Betula pubescens; climate change; seed production; Epirrita autumnata; Operophtera brumata; subarctic ecology; folivory; larval abundance;

    Sammanfattning : Boreal forest is the world’s largest terrestrial biome. Being one of the most ubiquitous and coldtolerant tree species in Sweden, the mountain birch forms a unique deciduous treeline and marks the forest-tundra ecotone. LÄS MER

  4. 3. Reindeer induced changes in vegetation composition and plant traits on a tundra-forest border

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

    Författare :Femke Pijcke; [2019]
    Nyckelord :physical geography; ecosystem analysis; plant functional traits; nutrient allocation; grazing; reindeer; Earth and Environmental Sciences;

    Sammanfattning : Reindeer (Rangifer tarandus) are the most common large herbivores in the arctic. With a habitat spreading over the entire circumpolar region, they can have a substantial effect on plant species composition and ecosystem processes and functions. LÄS MER

  5. 4. PLANT MIGRATION AT THE END OF THE WEICHSELIAN GLACIATION : Macrofossil evidence of early coniferous trees at two northern Swedish sites

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Karan Zakrzewski-Sharma; [2019]
    Nyckelord :Scandinavia; Weichselian; plant migration; macrofossils; climate change;

    Sammanfattning : Studies of vegetation history bring a new incentive to our understanding of plant survival and migration in arctic environments. For decades, environmental research was based on palynological data and these studies created a notion that tree species such as larch (Larix sibirica) and Scots pine (Pinus sylvestris) did not grow in northern Scandinavia at the end of Weichselian glaciation. LÄS MER

  7. 5. Fjällbjörkmätarlarvers påverkan på fjällbjörkskog : en fjärranalysstudie om markvegetationsförhållanden i subalpin miljö

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

    Författare :Melvin Moon; [2018]
    Nyckelord :Fjärranalys; NDVI; fjällbjörkmätare; Abisko; fjällbjörkskog; Earth and Environmental Sciences;

    Sammanfattning : Since the mid-1950s, studies have frequently been conducted on couplings between geometrid moth outbreaks and mountain birch, though not nearly as much focus has been on connections between geometrid moth outbreaks and ground cover. Previous studies have shown that major outbreaks of Epirrita autumnata occur in 9 – 10-year cycles (Karlsson et al. LÄS MER