Browsing Økologi og evolusjon by Issue Date
Now showing items 21-40 of 170
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Fine-scale spatial structure of root-associated fungi within a single plant root systemRestricted 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 ...
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(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 ...
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(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 ...
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(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 ...
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(Master thesis / Masteroppgave, 2014)Elettaria Maton is a small genus in the pantropical Zingiberaceae, comprising 11 species. Molecular data analyses have been widely used to reconstruct evolutionary history and to infer phylogenetic relationships, but to ...
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(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 ...
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(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 ...
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(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 ...
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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 ...
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(Master thesis / Masteroppgave, 2014)
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(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 ...
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(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 ...
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(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 ...
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Population dynamics, size hierarchy and neighbour interactions of early colonizing vascular plants in a Norwegian glacier forelandRestricted 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 ...
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(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 ...
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(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. ...
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(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 ...
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(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 ...
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(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 ...
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(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. ...