Browsing Naturhistorisk museum by Issue Date
Now showing items 21-40 of 761
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(Doctoral thesis / Doktoravhandling, 2009)This thesis presents a study of vegetation and plant population dynamics in a local vegetation–environment context, and examines the importance of management regimes for the maintenance of grassland species. In the modern, ...
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(Doctoral thesis / Doktoravhandling, 2009)The Gardnos structure in Hallingdal, Norway is an eroded impact crater, presently consisting of impactites and crater infill sediments exposed within a roughly circular area of about five km diameter. Investigations in ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)We describe an incomplete postcranial skeleton of Catopsbaatar catopsaloides from the ?late Campanian red beds of Hermiin Tsav I, in the Gobi Desert, Mongolia. The skeleton is fragmentary and the preservation of bone surface ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)Background Non-coding satellite DNA (satDNA) usually has a high turn-over rate frequently leading to species specific patterns. However, some satDNA families evolve more slowly and can be found in several ...
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(Doctoral thesis / Doktoravhandling, 2009)Large herbivores such as sheep affect plants directly and indirectly through selective foraging, trampling, urination and defecation, thereby modifying intra- and interspecific interactions and altering resource availability ...
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(Doctoral thesis / Doktoravhandling, 2009)As a starting point GIS (geographical information systems) seem intuitively to be a practical tool for biologists performing ecological research. GIS conveniently stores, explores, analyses and visualizes biological/ecol ...
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(Doctoral thesis / Doktoravhandling, 2010)This thesis addresses the spatial distribution and dynamics of vascular plant species in modern agricultural landscapes in SE Norway. This is done by analysing several data sets for species composition and environmental ...
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Stauropoctonus bombycivorus (Gravenhorst, 1829) in Norway (Hymenoptera, Ichneumonidae, Ophioninae) (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)The conspicuous icneumonid fly Stauropoctonus bombycivorus (Gravenhorst, 1829) is recorded for the first time in Norway. Four specimens have been captured in light-traps at three different localities in 2007: Hvaler in ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)The cynipoid family Ibaliidae is revised for Norway. Eight specimens where traced, all belonging to Ibalia rufipes Cresson, 1879. Records are present from Rollag municipality in Buskerud, Ullensaker, Sørum, and Skedsmo in ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background The great variety in sequence, length, complexity, and abundance of satellite DNA has made it difficult to ascribe any function to this genome component. Recent studies have shown that satellite ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background During the last 15 years the internal transcribed spacer (ITS) of nuclear DNA has been used as a target for analyzing fungal diversity in environmental samples, and has recently been selected as ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background The temporal origin and diversification of orchids (family Orchidaceae) has been subject to intense debate in the last decade. The description of the first reliable fossil in 2007 enabled a direct ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Crustose lichen communities on rocks exhibit fascinating spatial mosaics resembling political maps of nations or municipalities. Although the establishment and development of biological populations are important themes in ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background Major Histocompatibility Complex (MHC) has drawn the attention of evolutionary biologists due to its importance in crucial biological processes, such as sexual selection and immune response in ...
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(Doctoral thesis / Doktoravhandling, 2010)Sperm cells are the most variable animal cells, and a tremendous variation in sperm phenotypes exists among species, from minute amoeboid sperm to giant sperm in some species of fruit flies. Much effort has been devoted ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)The present survey reports 58 species of wasps belonging to the family Ichneumonidae hitherto not reported from Norway. The subfamilies Cryptinae, Ctenopelmatinae, Ichneumoninae, Microleptinae, Orthocentrinae, Pimplinae ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)Background Describing and evaluating miRNA inventories with Next Generation Sequencing is a goal of scientists from a wide range of fields. It requires high purity, high quality, and high yield RNA extractions ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)Background Cyanobacteria belong to an ancient group of photosynthetic prokaryotes with pronounced variations in their cellular differentiation strategies, physiological capacities and choice of habitat. ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)Background The fungal genus Serpula (Serpulaceae, Boletales) comprises several saprotrophic (brown rot) taxa, including the aggressive house-infecting dry rot fungus Serpula lacrymans. Recent phylogenetic ...
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(Doctoral thesis / Doktoravhandling, 2011)Genetic variation is a prerequisite for evolution. The present thesis examines how genetic diversity arises and is maintained. The thesis can be divided into two subprojects, addressing neutral and functional genetic ...