Sökning: "tundra plants"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden tundra plants.

1. 1. Applying LPJ-GUESS on the Arctic: A model evaluation and benchmarking study

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

   Författare :Margot Jeanne Knapen; [2023]
   Nyckelord :Physical Geography and Ecosystem Analysis; LPJ-GUESS; Arctic; FLUXNET; Gross Primary Productivity; Ecosystem Respiration; Permafrost; Active Layer Thickness; Snow Depth; Earth and Environmental Sciences;

   Sammanfattning : Warming in the Arctic occurs at a much higher rate than the global average, which has a considerable impact on the Arctic terrestrial carbon cycle. Permafrost thawing can release substantial amounts of carbon, whilst tundra shrubification and tree-line advance, on the other hand, may compensate for this. LÄS MER

3. 2. Forest, Tree, and Shrub limit responses to a century of climate change in Northern Norway

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

   Författare :Ella Björsbo; [2023]
   Nyckelord :Climate warming; growing season length; forest limit; tree limit; shrub limit;

   Sammanfattning : Climate changes have been observed in the Northern Hemisphere during the last century, causing a longer growing season and upslope expansion of forest, tree, and shrub limits. Here, a long-term historical perspective was used as a tool for investigating how climate change has impacted woody plants at the forest, tree, and shrub limits across the study region. LÄS MER

4. 3. Reindeer grazing, soil wetness and aspect interact to drive tundra plant community structure in northern Sweden

   Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

   Författare :Emma Gemal; [2023]
   Nyckelord :tundra plants; vegetation; abiotic vs. biotic effects; community composition; diversity; reindeer herbivory; accelerometry; grazing;

   Sammanfattning : The relative importance of abiotic versus biotic top-down factors on structuring tundra plant communities is debated. With climate change already strongly affecting the tundra ecosystem, understanding which factors will prevail is vital. LÄS MER

5. 4. 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

7. 5. Quantifying changes in soil bioporosity in subarctic soils after earthworm invasions

   Kandidat-uppsats,

   Författare :Joel Fransson Forsberg; [2021]
   Nyckelord :Biopores; macropores; geoengineering earthworms; X-ray tomography;

   Sammanfattning : Pores provide important hotspots for chemical and biological processes in soils. Earthworm burrows affect the macropore structure and their actions may create new preferential pathways for water and gas flow within soils. This, in turn, indirectly affect plants, nutrient cycling, hydraulic conductivity, gas exchange, and soil organisms. LÄS MER