Nearly one third of the vascular plant species of the remote high arctic archipelago of Svalbard are listed on the regional Red List for Svalbard, and there is a need for information to evaluate their conservation status, ...

Bale-apen (Chlorocebus djamdjamensis) er en lite kjent, endemisk primat fra det etiopiske høylandet. Apen er klassifisert som "Vulnerable" under IUCNs Rødliste for truede arter, og er truet av et stadig økende antropogent ...

Homoploid hybrid speciation in animals is poorly understood compared to the classic bifurcating mode of species diversification, mainly because of the scarcity of well-documented cases. Here, I presents the results of a ...

Environmental variables and epiphytic lichen flora of 279 deciduous rich bark trees of a boreonemoral rainforest in the oceanic region of Western Norway were studied. The lichen flora from base to breast height of the tree ...

Polyploidi er en sentral drivkraft for evolusjon hos dekkfrøede planter, og polyploide linjer er spesielt tallrike i arktiske strøk. I denne studien undersøkte jeg di- og tetraploide populasjoner av arten Jåblom, Parnassia ...

Around 11000 years ago the first domesticated mammals emerged in the Fertile Crescent. Over time, these animals spread to fertile regions both to the east and west of their domestic centre of origin. By 6000 BP, animal ...

Preliminary results from DNA-barcoding of Scandinavian butterflies and moths show high intraspecific sequence differences in the Autumnal moth, E. autumnata. One theory that might explain this finding is that E. autumnata ...

The climatic fluctuations of the Quaternary have greatly influenced the distribution, composition and genetic structure of plant populations. Dryas octopetala sensu lato is an arctic-alpine plant belonging to a circumpolar ...

Abstract 85 specimens from the genera Anthericum L. and Chlorophytum Ker Gawl. were analysed, and a phylogeny based on the nuclear ITS1 and chloroplast rps16 and trnL-F sequences was produced. The results are used to ...

Trichaptum fuscoviolaceum is a saprotrophic basidiomycete morphospecies growing on conifers. In the present study, the genetic structure in a circumboreal sample of T. fuscoviolaceum was analyzed using a multilocus sequencing ...

Fungal endophytes have been shown to be extremely widespread and abundant in terrestrial plants. It is also known that fungal endophytes may affect the grazing intensity of the host plant. In this study the occurrence of ...

Understanding the evolution of eukaryotes and resolving the Tree of Life is one of the major goals of biology. Protists (unicellular eukaryotes) play a crucial role in this quest being the earliest diverging eukaryotes and ...

Gloeoporus taxicola is a widespread saprotrophic polypore that occurs on a variety of coniferous substrates in the Northern Hemisphere. In this master thesis a multi-locus sequencing approach was used, on an extensive ...

Hybrid speciation has until recently been largely neglected by zoologists. This attitude is now changing. However, data is still scarce, and published examples include few taxa. In this thesis I present the first genetic ...

Following colonization of new habitats and subsequent strong selection, adaptation to environmental conditions might be expected to be rapid. In a mountainous lake in Norway, Lesjaskogsvatnet, more than 20 distinct spawning ...

Abstract Previous studies have revealed increased levels of germline mutations in minisatellite DNA in populations of herring gulls and mice sampled in Hamilton Harbour, Ontario Canada, an industrial area with high emissions ...

The ectomycorrhizal (ECM) dwarf shrub Dryas octopetala is one of the hardiest and most abundant of all woody plant groups in alpine and arctic environments. The main aim of this study was to characterise the fungal communities ...

Singing in the pied flycatcher, Ficedula hypoleuca, was examined in both intra- and intersexual contexts. Song responses to male intruders and prospecting females were investigated by introducing caged conspecific birds ...

Dryas octopetala L. is an arctic-alpine plant that belongs to a genus where the number and delimitation of species are not fully resolved. The plant is unusual, compared with most other arctic-alpine plants in its diploid, ...

Adaptation to different foraging resources is believed to be an important driving force of divergence between populations. Following colonization of freshwater, threespined sticklebacks (Gasterosteus aculeatus) have occupied ...

Oviraptorids are one of several groups of dinosaurs which have evolved beaks. Of extant beaked animals, birds and turtles are the best known. In this study, an anatomical comparison between oviraptorids, extant birds and ...

The control region (CR) of the mitochondrial DNA has been previously used to decipher the population structure of Holocene bowhead whales (Balaena mysticetus) from the Spitsbergen stock. The bone samples dated from recent ...

The Semi-collared flycatcher (Ficedula semitorquata) is a member of the black-and-white flycatcher species complex. It is poorly studied, rare, and is currently classified as “near threatened”, in the IUCN red lists of ...

Numerous scientific investigations have been undertaken to answer the question of Polynesian origins. Most archaeological and linguistic evidence and previous studies in population genetics suggested that Remote Oceania ...

Abstract The Atlas flycatcher (Ficedula speculigera) is a poorly studied species in an otherwise thoroughly studied species complex. In this study I attempt to reconstruct the evolutionary history of this species, I look ...

A Moroccan polycotylid plesiosaur from the early Turonian (Upper Cretaceous) of the Goulmima Formation is described. The specimen, bought from an American fossil dealer in 2002 by the Museum of Natural History, Oslo, is a ...

The monocot genera Ledebouria and Drimiopsis belong to the family Hyacinthaceae in the order Asparagales. The aim of this study was to investigate the generic delimitation between the two genera using DNA sequencing, and ...

Ornithomimosaurs are only one out of several dinosaurian groups that at some point evolved beaks. The morphology of this beak and its relation to dietary habits have long been debated.Birds and turtles are the primary ...

Summary. This work arose from a collaborative project between the University of Western Cape and the University of Oslo, funded by the Research Council of Norway. The original project was set up to identify informative ...

Abstract Up until now, there have not been many studies of single Gyrodactylus manipulations on salmonids performed in order to study the establishment, development and reproduction of the parasites. The results of the ...

Over the past 2 decades major advancements in phylogenetics have been made and this in turn has influenced our understanding of eukaryotic evolution. The use of morphological data combined with sequence data has been the ...

Four arctic, obligate parthenogenetic populations assumed to be polyploid and one temperate, cyclic parthenogenetic, diploid population were used to compare life history traits, growth rates and content of nucleic acids ...

Climatic fluctuations characterized the climate in East Africa during the Plio-Pleistocene. These variable conditions established opportunities for ecological fragmentation with subsequent genetic isolation of species ...

Fluctuating asymmetry (FA) as a measure of environmental stress was studied in polar bear (Ursus maritimus) skulls from East Greenland (n = 300, collected during the period 1892-2004) and Svalbard (n = 391, collected during ...

Introduced plant species may lead to negative consequences for the local community by outcompeting other species, and in extreme situations decrease biodiversity. It is well known that once an invasive species becomes ...

In this study I examined intra-specific variation in primary sex traits in male bluethroats (Luscinia svecica svecica), a passerine species with a high intensity of sperm competition, The single most important predictor ...