Sökning: "sedge"

Visar resultat 6 - 10 av 11 uppsatser innehållade ordet sedge.

  1. 6. Makrofossilanalys som ekologiskt verktyg : En metodutvärdering

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Siri Pettersson; [2017]
    Nyckelord :macro fossil analysis; cyperaceae; sedge; seed; archaeobotanic; paleo ecology; sweden; conservation; makrofossilanalys; arkeobotanik; paleoekologi; växtekologi; ekologi; historisk ekologi; cyperaceae; halvgräs; makrofossil; subfossil; achen; nöt; frukt; frö; metodutvärdering; artidentifiering; identifiering; järnålder; vikingatid; romersk järnålder; Gilltuna; västerås län; naturvård; äng; ängsmark; hage; gräsmark;

    Sammanfattning : Approximately 50 percent of all endangered species in Scandinavia are associated with old agricultural landscapes. During the agricultural industrialization of the past century the traditional practices and methods that created these environments have been phased out. LÄS MER

  3. 7. Is above- and belowground phenology of Eriophorum vaginatum in sync in a peatland underlain by permafrost?

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

    Författare :Amanda Ögren; [2017]
    Nyckelord :phenology; root growth; NDVI; permafrost; northern ecosystem;

    Sammanfattning : The phenology of plants in northern ecosystems is currently changing. Roots have a key role in these ecosystems, though the phenology of roots is still poorly understood. LÄS MER

  4. 8. Warming alters photosynthetic rates of sub-boreal peatland vegetation

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Arvo Aljaste; [2011]
    Nyckelord :Peatlands; CO2 uptake; Climate change; microtopography;

    Sammanfattning : Boreal peatlands are important in the global carbon cycle. Despite coveringonly 3% of the global land area, peatlands store approximately one third of all soilcarbon. Temperature is one of the major drivers in peatland carbon cycling as itaffects both plant production and CO2 fluxes from soils. LÄS MER

  5. 9. Biogaspotential hos våtmarksgräs

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för geovetenskaper

    Författare :Marvin Martins; [2009]
    Nyckelord :haymaking; biogas potential; co-digestion; retention time; grass; sedge; energy value; heating value; TUVA; VMI; wetland; meadow marsh; wet meadow; cultivation; restoration; wildlife; GIS; SMD; economy; maps; slåtter; biogaspotential; samrötning; uppehållstid; gräs; starr; energivärde; värmevärde; TUVA; VMI; våtmark; mad; strandäng; fuktäng; hävd; restaurering; djurliv; GIS; SMD; ekonomi; kartor;

    Sammanfattning : BIOGAS POTENTIAL IN GRASSES FROM WETLANDS Marvin Martins The purpose of this study has been to survey wetlands that are suitable for mowing and to analyze the biogas potential in the harvested grasses. A preformed investigation showed that there are suitable wetlands, which can be harvestable, namely those mowed formerly in traditional haymaking. LÄS MER

  7. 10. Plantering av gran (Picea abies) på kalhyggen och självföryngring under högskärmar av björk (Betula pendula och Betula pubescens) : föryngringsresultat 7-10 år efter avverkning

    L3-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Lars Johansson; [2008]
    Nyckelord :högskärm; plantering; markberedning; björk; gran; höjdtillväxt; naturlig föryngring; föryngringsresultat; beståndsföryngring;

    Sammanfattning : The aims of the silvicultural method natural regeneration of spruce (Picea abies L. Karst) in birch (Betula pendula and pubescens) shelterwoods are to establish a new stand of tree seedl-ings and to protect those from high groundwater levels, frost damages and grass competition during its first life years. LÄS MER