Browsing Brage NMBU by Author "Ohlson, Mikael"
Now showing items 21-34 of 34
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Multiscale vibrational spectroscopy of pollen
Bağcıoğlu, Murat (PhD Thesis;2016:10, Doctoral thesis, 2020-11-19)Pollen has a vital role in the reproduction of flowering plants by producing genetically diverse offspring via pollination. Environmental effects have strong influence on reproductive structures of plants, including on ... -
Naturskogsbegrepet i "Natur i Norge" (NiN) og sammenheng med målt epifyttisk lavbiomasse
Fjellberg, Elise Kittelsen (Master thesis, 2018)Mer enn 40 % av Norges landareal er dekket av skog og omtrent 60% av alle landets kjente arter er knyttet til dette biomet. Skogbruk har vært en viktig næring i landet i lengre tid, og skogbruket i Norge og Fennoskandia ... -
Phenotypic responses to light, water, and nutrient conditions in the allopolyploid Arabidopsis suecica and its parent species A. thaliana and A. arenosa: Does the allopolyploid outrange its parents?
Kornstad, Torbjørn H; Ohlson, Mikael; Fjellheim, Siri (Peer reviewed; Journal article, 2022) -
Seasonal variation in chemical composition of Chamerion angustifolium pollen as measured by Fourier-Transform Infrared Spectroscopy
Kirkhorn, Simen Arne (Master thesis, 2019)The quality of pollen is of fundamental importance for male reproductive success in spermatophytes, but our knowledge as to whether pollen quality is plastic and varies throughout the flowering season is limited. Pollen ... -
Seed dispersal and phenology of the invasive plant species Bunias orientalis and Lupinus polyphyllus in South-East Norway
Rask-Jensen, Cathrine (Master thesis, 2018)The alien, invasive species Bunias orientalis and Lupinus polyphyllus are in expansion in Norway and pose an ecological threat to native species. The species form large and dense populations on wastelands, previous ... -
Small-scale spatial variation in soil properties within an old-growth European beech forest and two Norway spruce forests
Thomassen, Eivind (Master thesis, 2016-09-02)The aim of this study was to investigate species related differences in soil carbon and nitrogen concentration, pH and condensed tannin content in topsoil’s in Norway spruce (Picea abies) European beech (Fagus sylvatica) ... -
Soil carbon stocks in different vegetation classes across the treeline ecotone in central- and southern Norway
Aasgård, Olav With (Master thesis, 2022)The expansion of the treeline into the currently treeless alpine tundra may have considerable impacts on carbon storage. Recent studies have shown that the expansion of trees into the alpine tundra could lead to an increase ... -
Soil carbon storage in the forest-tundra ecotone : insights from field- and remotely sensed data
Devos, Claire Céline (PhD Thesis;2023:84, Doctoral thesis, 2023)Due to climate warming, forests are moving to higher elevations and latitudes at the expense of treeless tundra. Recent studies suggest that these vegetation shifts promote soil organic carbon (SOC) losses that exceed ... -
Spatial variation of surface soil carbon in a boreal forest – the role of historical fires, contemporary vegetation, and hydro-topography
Haukenes, Vilde Lytskjold; Åsgård, Lisa; Asplund, Johan; Nybakken, Line; Rolstad, Jørund; Storaunet, Ken Olaf; Ohlson, Mikael (Peer reviewed; Journal article, 2022)Knowledge about the spatial variation of boreal forest soil carbon (C) stocks is limited, but crucial for establishing management practices that prevent losses of soil C. Here, we quantified the surface soil C stocks across ... -
Temperature, precipitation and biotic interactions as determinants of tree seedling recruitment across the tree line ecotone
Tingstad, Lise; Olsen, Siri Lie; Klanderud, Kari; Vandvik, Vigdis; Ohlson, Mikael (Journal article; Peer reviewed, 2015)Seedling recruitment is a critical life history stage for trees, and successful recruitment is tightly linked to both abiotic factors and biotic interactions. In order to better understand how tree species’ distributions ... -
Tree species effects on litter decomposition and soil carbon
Ransedokken, Yngvild (PhD thesis;2022:18, Doctoral thesis, 2022)Boreal forests soils play an important role in mitigating climate change as they are the largest terrestrial carbon pool. The accumulation of soil carbon is regulated by the balance of carbon and nitrogen input from plant ... -
Treeline dynamics in Trillemarka - Rollagsfjell
Mortensen, Adrian (Master thesis, 2016-09-02)The environmental effects that determine the altitude of the tree line have been discussed for a long time. Alpine ecosystems are known to be particularly sensitive to climate warming, and both biotic interactions as well ... -
Variable soil carbon stocks across fine spatial scales in a natural boreal forest landscape
Åsgård, Lisa (Master thesis, 2021)Boreal forests, and especially boreal forest soils, are of considerable importance in global carbon dynamics and climate regulation. There are several studies that have modelled and quantified boreal soil carbon stocks, ... -
Viltlevende dyrs bruk av norske veiunderganger : med fokus på småvilt, amfibier og etiske betraktninger
Ellingsen, Vanessa Marie (Master thesis, 2018)The construction of road infrastructure leads to negative effects on animals, such as wildlife-vehicle collisions, fragmentation, degradation of habitats and increased levels of disturbance. Amphibians are of a special ...