Browsing Faculty of Environmental Sciences and Natural Resource Management (MINA) by Document Types "Doctoral thesis"
Now showing items 61-80 of 135
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How termites and large mammalian herbivores influence tree communities, seed removal and wood decomposition in an African savanna
(PhD Thesis;2018:71, Doctoral thesis, 2018)The heterogeneity and extent savannas makes them resilient, diverse and socioeconomically important. Abiotic factors determine large-scale variation on a, but biotic factors matter at small-scales. In the African savannas, ... -
Human-mediated effects on brown bear behavior and potential cascading effects
(PhD Thesis;2018:79, Doctoral thesis, 2018)Human disturbance has been found to influence wildlife in various ways, e.g., changing their distribution in the landscape or other behavioral traits as a response to the perceived predation risk. Brown bears (Ursus arctos) ... -
Impact of biochar on soil physical characteristics and greenhouse gas emissions
(PhD Thesis;2015:100, Doctoral thesis, 2015)Climate change and production of adequate amounts of food to feed the growing human population are key challenges facing the modern world. These two challenges often involve a trade-off between solving the one, while ... -
Impact of climate and agricultural management on hydrology and water quality : a headwater catchment scale approach
(PhD Thesis;2021:77, Doctoral thesis, 2021)Eutrophication and degradation of water quality are global problems and affect many freshwater and coastal systems. Agricultural areas are major contributors of nutrients and soil particles in streams and lakes. The ... -
Impact of low dose rate ionising radiation : studies in mice evaluating immediate and long-term molecular responses and transgenerational genomic instability
(PhD Thesis;2023:40, Doctoral thesis, 2023)Mye av det vi vet om risiko for helseeffekter etter å ha blitt usatt for ioniserende stråling er kunnskap lært fra de som overlevde atombombene i Hiroshima og Nagasaki. Imidlertid er denne kunnskapen basert på effekter ... -
Impediments to forest recovery in bracken-dominated clearings in the African Highlands
(PhD Thesis;2018:70, Doctoral thesis, 2018)Vegetation dynamics in disturbed forested landscapes remain incompletely understood. Considerable areas with stalled forest recovery occur worldwide and may reflect the effects of dense and persistent understorey plants ... -
The importance of invertebrates on fungi in dead wood
(PhD Thesis;2022:43, Doctoral thesis, 2022)Dead wood is an important energy source in boreal forests and it hosts a high biodiversity dominated by fungi and invertebrates. Wood decay fungi are the initial decomposers of dead wood and invertebrates interact with ... -
Improving forest inventory and monitoring by combining remotely sensed three-dimensional and spectral information
(PhD Thesis;2011:22, Doctoral thesis, 2011)Forest inventory has benefited from remote sensing for more than 80 years. Spectral information from aerial cameras has been the dominant data source during this period. However, over the past decade the use of three-dimensional ... -
In vivo studies of respiratory physiology in Arctic charr (Salvelinus alpinus) and Atlantic cod (Gadus morhua) exposed to aquaculture relevant levels of hypoxia, hyperoxia and hypercapnia
(PhD Thesis;2010:34, Doctoral thesis, 2010)Fish in aquaculture will be exposed to water oxygen and carbon dioxide levels that they do not normally encounter in the wild. These unnatural environmental conditions may be challenging to fish as they may lack the proper ... -
Integrating life cycle assessment and forest modelling for environmental and economic assessment of forest based bioenergy in Norway
(PhD Thesis;2015:11, Doctoral thesis, 2018-12-19)There is a growing interest in bioenergy, both nationally and internationally, due to the increasing emissions of greenhouse gases. The Norwegian forest growing stock is increasing and can be used to produce a range of ... -
Invasion potential and host suitability for selected bark- and wood-boring insect pests
(PhD Thesis;2016:72, Doctoral thesis, 2016)Introduction of nonnative species is often a by-product of increasing global trade. Some nonnative species may reach extremely high population densities, deplete resources and cause extensive economic and ecological damage ... -
Investigating sensitivity and tolerance to chronic gamma irradiation in the nematode Caenorhabditis elegans
(PhD Thesis;2020:8, Doctoral thesis, 2020)At the cellular level, excitation and ionization of atoms and molecules constitute the fundamental processes leading to harmful effects induced by exposure to ionizing radiation. However, radiosensitivity, defined as the ... -
Landscape-scale determinants and dynamics of large carnivore density
(PhD Thesis;2023:36, Doctoral thesis, 2023)1. Wildlife populations live in increasingly human-altered landscapes. Either because of their intrinsic values or due to instrumental values to humans, wildlife populations are monitored to inform about their current ... -
Large carnivore responses to human activity and infrastructure at multiple scales in Scandinavia
(PhD Thesis;2021:94, Doctoral thesis, 2021) -
Large-area forest productivity estimation using bitemporal data from airborne laser scanning and digital aerial photogrammetry
(PhD Thesis;2020:37, Doctoral thesis, 2020)Site index (SI) indicates the magnitude of timber production that can be realized at a given site and is a crucial variable in forest planning. In Norwegian forest management inventories, SI is commonly quanti ed with large ... -
Late Weichselian glacial dynamics and retreat patterns of the Fennoscandian Ice Sheet in Gausdal Vestfjell, southcentral Norway, acquired from spatial data
(PhD thesis;2018:68, Doctoral thesis, 2018)Evidence-based geomorphological research (analyses of glacial landform record) is one of the commonly used types of glacial reconstructions applied for studying the past ice sheets. The work covered by this thesis contains ... -
Learning from the past : using lake sediments as chemical and biological archives
(PhD Thesis;2015:27, Doctoral thesis, 2017-07-12)This thesis advances the analysis of the organic fraction of sediment to reconstruct lake history using DNA fragments and algal pigments in combination with available monitoring data. These methods were tested in southern ... -
Leveraging non-invasive monitoring of carnivores using hierarchical models
(PhD thesis;2020:59, Doctoral thesis, 2020)The development of non-invasive approaches for monitoring wildlife populations made it feasible to obtain ecological parameters across landscapes and populations, rather than a few locations or individuals. The two most ... -
Lichen-gastropod interactions : Chemical defence and ecological consequences of lichenivory
(PhD Thesis;2010:2, Doctoral thesis, 2010)Herbivory are considered a significant factor regulating plant communities. Some mammals, e.g. reindeers, substantially influence lichen-dominated communities. The impact on lichens posed by invertebrate grazers is less ... -
LiDAR, habitat structure and the ecology of ungulates in a landscape of fear
(PhD Thesis;2015:5, Doctoral thesis, 2020-11-10)The expression ‘landscape of fear’ describes a situation in which prey behavior and space use across the landscape are shaped by spatial and temporal patterns in predation risk. Yet such behavioral and indirect effects of ...