Small, isolated and/or peripheral populations are expected to harbour low levels of genetic variation and may therefore have reduced adaptability to environmental change, including climate warming. In the Arctic, global warming has already caused vegetation change across the region and is acting as a significant stressor on Arctic biodiversity. Many of the rare plants in the Arctic are relicts from ...

Due to major shifts in the marine ecosystem, many seabirds in the NE Atlantic have experienced short- and long-term breeding failures and population changes. One such seabird is the Atlantic puffin Fratercula arctica, the populations of which have declined in Norway at an annual rate of 2% over a ~30 yr period. Parallel to this decline, we found a significant decline in egg volume at 2 widely ...

Mange tiltak foreslås for å ruste norske lærere til å møte stadig større pedagogiske utfordringer. Nettbasert veiledning er ett slikt tiltak, og forventningene til de teknologibaserte løsningene har vært store. Imidlertid mangler forskning på hvordan lærere anvender, og vurderer tilbud om nettbasert faglig støtte. Artikkelen belyser funn fra en studie av læreres bruk av det nettbaserte veiledningstilbudet ...

«Margrete Kreutz’ historie» (Margrete Kreutzen jieleden bïjre) er ei vandreutstilling som jeg produserte i samarbeid med billedkunstner Elin Andreassen og Tromsø Museum – Universitetsmuseet sommeren 2012. Utgangspunktet for utstillinga var den da nylig avleverte doktorgradsavhandlinga mi om levende utstillinger av samer på verdensutstillinger, i dyrehager, fornøyelsesparker og andre steder i Europa ...

From the late 1800s and until the protection of polar bears came into force in 1973, there were regular private hunting expeditions to the Arctic by boat, including several from Tromsø. In this article, I investigate how masculinity is manifested in specific empirical evidence: a trophy hunting expedition with the Sutton family that left from Tromsø in the summer of 1932. Using masculinity as a lens ...

Density-dependent feedback is recognized as important regulatory mechanisms of population size. Considering the spatial scales over which such feedback operates has advanced our theoretical understanding of metapopulation dynamics. Yet, metapopulation models are rarely fit to time-series data and tend to omit details of the natural history and behavior of long-lived, highly mobile species such as ...

Whole-genome duplications (WGDs) have long been considered the causal mechanism underlying dramatic increases to morphological complexity due to the neo-functionalization of paralogs generated during these events. Nonetheless, an alternative hypothesis suggests that behind the retention of most paralogs is not neo-functionalization, but instead the degree of the inter-connectivity of the intended ...

DNA i vannprøver og jordprøver kan gi verdifull informasjon om hvilke organismer som er til stede i økosystemene i dag, og hvordan livet har utviklet seg over tid.