Sökning: "taiga"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet taiga.

  1. 1. Interactions between climate, natural disturbances, and regeneration in boreal and hemi-boreal forests

    Författare :Igor Drobyshev; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conservation strategies; Plant ecology; Växtekologi; taiga; seasonal climate; shoot increment; larch; reconstruction; human; canopy gap; fire history; boreal; natural disturbances; dendrochronology;

    Sammanfattning : Natural disturbance is an important driving force of community dynamics in many forest types around the globe. Understanding spatial and temporal properties of disturbance events in the present and in the past is important in formulating the nature conservation strategies as well as for the modeling of climate and human impacts on forest vegetation. LÄS MER

  3. 2. Predator-prey dynamics in small mammals along gradients of primary productivity

    Författare :Tarja Oksanen; Christian Otto; N. C. Stenseth; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; cycles; herbivory; lemmings; mustelids; predation; productivitly; spatial heterogeneity; taiga; trophic exploitation; tundra;

    Sammanfattning : .... LÄS MER

  4. 3. Linking landscape variables, hydrology and weathering regime in Taiga and Tundra ecoregions of Northern Sweden

    Författare :Erik Smedberg; Christoph Humborg; Robert Striegl; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Taiga and tundra; high-latitude; carbon fluxes; weathering; hydrological alterations; Earth sciences; Geovetenskap; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : High-latitude watersheds have been regarded as a carbon sink with soil carbon accumulating at low temperature. This sink is now believed to turn into a source, acting as positive feedback to climate warming. LÄS MER

  5. 4. High-resolution mapping and spatial variability of soil organic carbon storage in permafrost environments

    Författare :Matthias Benjamin Siewert; Gustaf Hugelius; Peter Kuhry; Iain Hartley; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; carbon; soil organic carbon; permafrost; soil; land cover classification; digital soil mapping; machine-learning; ecosystem; mapping; landscape studies; Siberia; Arctic; Physical Geography; naturgeografi;

    Sammanfattning : Large amounts of carbon are stored in soils of the northern circumpolar permafrost region. High-resolution mapping of this soil organic carbon (SOC) is important to better understand and predict local to global scale carbon dynamics. LÄS MER

  7. 5. Animals and Humans : Human-animal interaction in northern Sweden during the late glacial and postglacial time

    Författare :Therese Ekholm; Sabine Sten; Carl-Gösta Ojala; Ola Magnell; Uppsala universitet; []
    Nyckelord :Mesolithic; fauna; radiocarbon dating; northern Sweden; calcined bones; pioneers; hunter-gatherers; zooarchaeology; lithic technology; taphonomy; 8.2 k BP cold event; prey.; Archaeology; Arkeologi;

    Sammanfattning : When the last remnant of the Weichsel glacier melted in northern Sweden, around 7000 BC, pioneer settlers entered virgin land, following their prey, which in turn followed the vegetation dispersion. Some of the settlers derived from the east and the northeast and spread from the Russian taiga, through Finland and into northern Sweden, the study area for this thesis. LÄS MER