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(Master thesis / Masteroppgave, 2014)
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
I present a model of chiasma interference and recombination in homo- and heterokaryotypes and a model of nonrandom mating. These two models form the basis of a general-purpose deterministic multilocus evolution simulator, ...
(Master thesis / Masteroppgave, 2013)
Speciation involves the evolution of reproductive barriers that maintain the genetic integrity of species. Premating barriers, in particular, have been referred to as one of the most important mechanisms in keeping species ...
(Master thesis / Masteroppgave, 2019)
Human activities have historically influenced the evolution of other species. Dramatic modifications in land-use and extreme urbanization have increased not only the amount of species associated with human environments, ...
(Master thesis / Masteroppgave, 2019)
The INFLORESCENCE DEFICIENT IN ABSCISSION (IDA)/IDA-LIKE gene family encodes peptides hypothesized to be involved in different cell-separation events in plants. A phylogenetic analysis was performed to elucidate the ...
(Master thesis / Masteroppgave, 2014)
As molecular and bioinformatics techniques are used more frequently and new marine habitats are analysed, a constant increase of marine fungal diversity has been reported, suggesting that marine fungi are a diverse but ...
(Master thesis / Masteroppgave, 2014)
(Master thesis / Masteroppgave, 2013)
Sorghum is ranked the fifth most produced food crop in the world, and is a dietary staple for over 500 million people in over 30 countries. It is the second most produced food crop in Africa, where cultivation of local ...
(Master thesis / Masteroppgave, 2014)
The three-spine stickleback is an adaptable fish with variation in morphology and behaviour, inhabiting saltwater, brackish water and fresh water. It is armoured with 30-35 bone plates along its lateral line. In addition, ...
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2015)
Hybridization is increasingly recognized as a source of novel variation, but how hybridization can contribute to evolution is still not fully understood. Insights into the evolutionary potential of hybrid species, and the ...
(Master thesis / Masteroppgave, 2013)
The dry rot fungus Serpula lacrymans is known as one of the most aggressive fungal house invaders in temperate regions. Recent genetic and phylogeographic studies have shed light on the distribution, colonisation and ...
(Master thesis / Masteroppgave, 2013)
This thesis presents a synthesis of experimental studies with Daphnia, in a multigenerational perspective. The main goal of the thesis was to investigate the role of diet (phosphorous (P) limitation) and temperature (10 ...
Low host specificity among arctic ectomycorrhizal fungi Restricted Access
(Master thesis / Masteroppgave, 2013)
Host specificity among ectomycorrhizal (ECM) fungi seems to vary among different habitats, and it is difficult to draw general conclusions across environments. Little is known about the host specificity among arctic ECM ...
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2013)
The epiphytic bryophyte composition between and within 73 ash trees (minimum stem diameter at breast height 20 cm) at Tungesvik, Etne, West Norway was investigated. The main aim of the study was to investigate patterns of ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2013)
The common chaffinch (Fringilla coelebs) is a widespread passerine species in the West Palearctic, and is a common breeder in most of Europe, western Asia, northern Africa, and the Macaronesian islands in the Atlantic ...
(Master thesis / Masteroppgave, 2017)
Population Dynamics, Size Hierarchies and Neighbour Interactions of Early Colonizing Vascular Plants of a Norwegian Glacier Foreland Restricted Access
(Master thesis / Masteroppgave, 2014)
The population dynamics of the three early colonizing vascular plant species Oxyria digyna, Poa alpina and Ranunculus glacialis was studied in a chronosequence in the glacier foreland of Hellstugubreen in Jotunheimen ...
(Master thesis / Masteroppgave, 2014)
Reproductive barriers between diverging taxa are necessary for speciation to occur. Premating barriers are thought to be of especially great importance, such as plumage colour which is often used in species recognition and ...
(Master thesis / Masteroppgave, 2015)
Ticks are important vectors for a variety of pathogens of medical and veterinary importance worldwide. Small rodents and shrews are widely distributed, and can harbour several species of ticks and substantial tick burdens. ...
(Master thesis / Masteroppgave, 2015)
Section Cochlearia (Brassicaceae) includes highly polymorphic species complexes with regard to ploidal level, ecological adaptation and distribution. Low levels of chloroplast DNA divergence suggest that taxa most likely ...
(Master thesis / Masteroppgave, 2016)
Fragmentation of habitats is one of the major threats to biodiversity. Fragmentations will reduce connectivity and consequently affect the genetic population structure particularly in rivers. In the current study the genetic ...
(Master thesis / Masteroppgave, 2015)
Nutrient availability is important for microbes in soil environments. When an animal dies and decomposes, nutrients are released into the soil. This may cause a shift in the diversity of microbes present, as well as lead ...
(Master thesis / Masteroppgave, 2016)
Bird song is used for both intra-sexual and inter-sexual interactions, in male-male competition and for attracting females. In species that use song for attraction, the females often prefer males with larger repertoires ...
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
Genomic Analyses of Bowhead Whale (Balaena mysticetus) individuals Restricted Access
(Master thesis / Masteroppgave, 2017)
Climate change effects on substrate affinity and trait-dependent responses in wood-decomposing fungi
(Master thesis / Masteroppgave, 2016)
Climate change is the effect of rapid and recent change in global climate variables, affecting all species in all ecosystems. Fungi are no exception, fulfilling a variety of important roles as decomposers, parasites and ...
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2014)
Polyploidy and ecotypic differentiation are important aspects of plant evolution. The present study has applied molecular methods to investigate the polyploid origin and ecotypic differentiation of the tetraploid Cochlearia ...
(Master thesis / Masteroppgave, 2014)
European grayling from a common-gene pool and with a known ancestry were released into headwaters of a river system in Lesja, Oppland, Norway, about a century ago. These grayling dispersed downstream, and as a result there ...
Effekt av temperatur og fosforkonsentrasjon på celle- og genomstørrelse av Chlamydomonas reinhardtii
(Master thesis / Masteroppgave, 2014)
Temperatur og fosforkonsentrasjon spiller inn på cellesyklus til C. reinhardtii. Ikke-synkron cellesyklus gjør størrelsesendringer vanskelig å detekterer. Mulig genomstørrelse endring som følge av reallokasjon av P fra DNA ...
(Master thesis / Masteroppgave, 2014)
Interspecific hybridization has intrigued evolutionary biologists since Darwin s time. New genetic combinations can arise from hybridization, leading to offspring sometimes able to adapt to different niches than their ...
(Master thesis / Masteroppgave, 2014)
Extractive foraging of underground storage organs (USOs) is believed to have played an important role in human evolution. This behavior is also present in wild chimpanzees (Pan troglodytes), who sometimes use tools in the ...
(Master thesis / Masteroppgave, 2014)
The taxonomy of the staphylinid genus Mocyta was explored using molecular markers, in addition to a thorough investigation of the published literature regarding this genus and its proposed morphospecies. The aim was to ...
(Master thesis / Masteroppgave, 2014)
(Master thesis / Masteroppgave, 2014)
Phenotypic plasticity allows organisms with identical genotypes to develop different phenotypes in response to different environmental cues. Phenotypic plasticity is a trait in itself, and can be either adaptive or ...
Description of a new Upper Jurassic ophthalmosaurid ichthyosaur from the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen Restricted Access
(Master thesis / Masteroppgave, 2013)
Ichthyosaurs were a group of marine reptiles that thrived in the Mesozoic seas. They evolved to be highly specialized marine predators, and were the first reptilian group to be entirely aquatic. This project’s goal was to ...
(Master thesis / Masteroppgave, 2013)
The main objective of the present study is to describe and compare the morphology of the female genitalia within a selected number of species and families of the lower Diptera. The results are presented as two papers with ...
(Master thesis / Masteroppgave, 2013)
(Master thesis / Masteroppgave, 2013)
(Master thesis / Masteroppgave, 2020)
As an effect of climate change and alterations in land use, the ranges of roe deer and also that of their ectoparasites, like the sheep tick (Ixodes ricinus) are expanding. This has also increased the occurrence of tick-borne ...
(Master thesis / Masteroppgave, 2013)
The ridge-snowbed gradient is of high importance in alpine areas in structuring the vegetation cover. However, to what degree belowground fungal communities are affected by the gradient is much poorer understood. In this ...
(Master thesis / Masteroppgave, 2015)
Fisheries activities and the development of more efficient fishing gear, have had detrimental effects in commercial stocks. This occurs largely as a result of negative selection acting on certain individuals during the ...
Vegetation-environment relationships of a kettle-hole floodplain at Øvre Romerike, SE Norway Restricted Access
(Master thesis / Masteroppgave, 2015)
Sandtjern nature reserve, located on the Gardermoen Delta, SE Norway, consists of a series of kettle holes that are subjected to severe annual wet-dry cycles due to flooding. In the rainy season in late autumn, the kettle ...
(Master thesis / Masteroppgave, 2015)
Hybridization is a common phenomenon within the genus Canis. The recently discovered African wolf (Canis lupaster), is sympatric with several closely related species; the Ethiopian wolf (Canis simensis), the side-striped ...
Population dynamics, size hierarchy and neighbour interactions of early colonizing vascular plants in a Norwegian glacier foreland Restricted Access
(Master thesis / Masteroppgave, 2014)
The population dynamics of the three early colonizing plant species Saxifraga stellaris, Arabis alpina and Cerastium cerastoides was studied in the Hellstugubreen glacier foreland in Jotunheimen National Park in southern ...
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2015)
When facing life-threatening perturbation the following stress reaction will usually turn current behavior towards survival behaviors. However, this can have a potential fitness trade-off if it turns behavior away from ...
(Master thesis / Masteroppgave, 2015)
The Black Death pandemic swept through Europe during the Middle Ages leading to high mortality from plague, caused by the bacterium Yersinia pestis. How the disease was transmitted in Europe is not fully elucidated, and ...
(Master thesis / Masteroppgave, 2015)
Juncus bulbosus Growth Experiment performed over 13 weeks to establish its response to anoxic conditions over root system. 20 of 40 plants were grown hydroponically with oxygen deprived water supplied to the root system. ...
(Master thesis / Masteroppgave, 2015)
Repeatable behavioural variation within individuals that is consistent over time and across contexts is often defined as non-human animal personality. Individuals may be classified as having a shy or bold personality. Shy ...
(Master thesis / Masteroppgave, 2016)
The regular movement of animals between summer and winter ranges, termed seasonal migration, is a common phenomenon among ungulates at northern latitudes. The most prominent hypothesis to explain seasonal migration is the ...
(Master thesis / Masteroppgave, 2014)
Plant reproduction in the Arctic is challenging, and tight energy budgets, short growing season and the limited number of pollinators favour self-pollination. Self-pollination over time will, however, have a negative effect ...
(Master thesis / Masteroppgave, 2014)
Heterozygosity is often shown to have a positive relationship with fitness-related characters. Sperm cells are fitness-related characters that show great variation among species, population's males and even within individual ...
(Master thesis / Masteroppgave, 2014)
A set of life history traits were studied in order to compare the thermal responses of two populations of the surface living Collembolan Hypogastrura viatica, from the highly contrasting climates of north east Svalbard and ...
(Master thesis / Masteroppgave, 2015)
Across the avian lineage, closely related species, or even populations within the same species may display differing migratory phenotypes. The many components of migratory behaviour are inherited as one migratory gene ...
Effects of marine protected areas and selective fishing on abundance, age and size structure of goldsinny wrasse (Ctenolabrus rupestris) populations. Restricted Access
(Master thesis / Masteroppgave, 2015)
Wrasse species went from having almost no commercial value in Norway, and not being fished, to a landing of 21.2 million individuals in 2014 with 11.68 million of these being goldsinny. This explosive growth in fishing ...
(Master thesis / Masteroppgave, 2015)
Various stressors such as higher temperatures, grazing by sea urchins, and anthropogenic effects may threaten kelp forests around the world. Conservation efforts can benefit from an understanding of current and historic ...
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
Fine-scale spatial structure of root-associated fungi within a single plant root system Restricted Access
(Master thesis / Masteroppgave, 2014)
Ectomycorrhiza (ECM) is an ancient and prevalent symbiosis between plants and fungi, and is crucial for growth and survival for a number of plants. Host plants can form ECM with multiple fungi, yet little is known about ...
(Master thesis / Masteroppgave, 2015)
A permanent landscape scale grazing experiment was established at Hol, Buskerud, in a lower alpine ecosystem with a recent history of rather low grazing pressure. Since 2002, nine sub-enclosures has been permanently subjected ...
(Master thesis / Masteroppgave, 2015)
Animal personality can be defined as individual behavioural differences that are repeatable and consistent across time and/or contexts. In the model species great tit Parus major, studies on personality have shown consistent ...
Mycorrhiza and root-associated fungi of the ericaceous Arctic plant Cassiope tetragona after artificial warming and in the natural environment Restricted Access
(Master thesis / Masteroppgave, 2015)
Mycorrhizal associations are essential to most plant life on earth. Cassiope tetragona is a circumpolar Arctic plant in the Ericaceae family, which has been reported to form ericoid mycorrhiza as well as ectomycorrhiza, ...
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2017)
Abstract Rotifers and phytoplankton have been vastly used by scientists as model organisms in toxicological, eco-toxicological, ecological and other studies. In order to conduct experiments on interactions between animals ...
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
During the last century, the grey wolf (Canis lupus L.) was subject to extensive hunting pressure, which led to functional extinction of this species from the Scandinavian Peninsula around 1970. Wolves reappeared in ...
(Master thesis / Masteroppgave, 2018)
Phylotranscriptomics of Chlorophyta: Evolutionary interpretation of cytomorphologies and non-canonical codons in Ulvophyceae Restricted Access
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
In the Arctic tundra several different species of herbivores co-exist, with potentially large effects on tundra ecosystem functions and dynamics. Understanding the herbivores trophic interactions therefore provides essential ...
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2020)
Urban natur er lite forsket på sammenlignet med uberørt natur, men naturen i og rundt byene er viktig å ha kunnskap om for å kunne ta gode og bærekraftige avgjørelser i byplanlegging og vern av natur. Naturen i og rundt ...
Populasjonsundersøkelser av dragehode (Dracocephalum ruyschiana) - med fokus på isolasjon, areal, naturtyper og gjengroing på utvalgte lokaliteter i Sørøst-Norge Restricted Access
(Master thesis / Masteroppgave, 2020)
Sammendrag Mange arter er i dag truet med utrydning fordi stadig mer areal blir tatt i bruk eller endret av mennesker. En av disse artene er dragehode (Dracocephalum ruyschiana), som er i kategorien sårbar (VU) på rødlista ...
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2021)
Camera trapping is an increasingly important tool in animal ecology that is generally targeted towards large mammals, and especially large carnivores. Nonetheless, the cameras are triggered by all large and medium-sized ...
Molecular phylogeny and morphological variation of the genus Thymus (Lamiaceae) and its allies Restricted Access
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2022)
Den økende populariteten til sanking har gjort at tradisjonell kunnskap (TEK) om sanking i Norge nå blir diskutert gjennom mange steder, inkludert litteratur, litteratur på nettet, sosiale medier og in situ kurs. Bruken ...
(Master thesis / Masteroppgave, 2019)
Black-headed Gulls are in rapid decline in Norway and is categorized as VU (Vulnerable) on the national Red List. The Norwegian population has decreased from 30 000 pairs around 1990 to just 7000 pairs in 2011. In the study ...
(Master thesis / Masteroppgave, 2017)
In sexually reproducing taxa, normal sperm function is critical for successful reproduction, and pathogenic bacteria can prevent this. Thus, understanding the role of bacteria in ejaculates can have significant implications ...
(Master thesis / Masteroppgave, 2017)
I have addressed taxonomic affiliation, genus delimitation, and species delimitations in the lichen genus Eschatogonia. Preliminary parsimony analyses, based on one mitochondrial (SSU) ribosomal DNA-region, on a dataset ...
(Master thesis / Masteroppgave, 2022)
The major histocompatibility complex (MHC) genes are highly diverse in vertebrates and have demonstrated to yield a higher fitness with an optimal diversity that is neither too high nor too low. MHC based mate choice has ...