Now showing items 107-126 of 223

    • Lake sedimentary DNA accurately records 20th Century introductions of exotic conifers in Scotland 

      Sjøgren, Per Johan; Edwards, Mary Elizabeth; Gielly, Ludovic; Langdon, Cathrine; Croudace, I.W.; Merkel, Marie Kristine Føreid; Thierry, Fonville; Alsos, Inger Greve (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-28)
      Sedimentary DNA (sedDNA) has recently emerged as a new proxy for reconstructing past vegetation, but its taphonomy, source area and representation biases need better assessment. We investigated how sedDNA in recent sediments of two small Scottish lakes reflects a major vegetation change, using well-documented 20th Century plantations of exotic conifers as an experimental system. We used next-generation ...
    • Landsmøtet 1917 og samebevegelsen i nord 

      Bjørklund, Ivar (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      THE SÁMI NATIONAL ASSEMBLY IN 1917 AND THE SÁMI MOVEMENT IN THE NORTH <br> The Sámi national assembly held in Trondhjem in 1917 is considered to be the very first organized political opposition from the Norwegian Sámi. However, among the 150 persons attending, only three Sámi were from Northern Norway – an area where 90% of the Sámi population lived. The participants were Sámi from the southern parts ...
    • Later at higher latitudes: large-scale variability in seabird breeding timing and synchronicity 

      Burr, Zofia M.; Varpe, Øystein; Anker-Nilssen, Tycho; Erikstad, Kjell E; Descamps, Sébastien; Barrett, Robert T.; Bech, Claus; Christensen-Dalsgaard, Signe; Lorentsen, Svein-Håkon; Moe, Børge; Reiertsen, Tone Kristin; Strøm, Hallvard (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-28)
      In seasonal environments, organisms are expected to optimally schedule reproduction within an annual range of environmental conditions. Latitudinal gradients generate a range of seasonality to which we can expect adaptations to have evolved, and can be used to explore drivers of timing strategies across species’ distribution ranges. This study compares the timing of egg hatching in four seabird ...
    • Levedyktighetsanalyser for norske lomvibestander 

      Erikstad, K.E.; Reiertsen, T.K.; Anker-Nilssen, Tycho; Barrett, Robert T.; Lorentsen, Svein-Håkon; Strøm, H.; Systad, G.H. (Research report; Forskningsrapport, 2007-03)
      Hekkebestandene av lomvi (Uria aalge) langs norskekysten har hatt en sterk nedgang i løpet av de siste 45 årene. Den norske fastlandsbestanden utgjør i dag ikke mer enn ca 15 000 par, mens den til sammenligning ble beregnet til 120-160 000 par i begynnelsen av 1960-årene. Den største bestanden i norske områder finnes i dag på Bjørnøya hvor det hekker ca 100 000 par, men også her er bestanden ...
    • Liberating Mimesis: Between Art and Anthropology 

      Ragazzi, Rossella (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
    • Limited Phylogeographic Signal in Sex-Linked and Autosomal Loci Despite Geographically, Ecologically, and Phenotypically Concordant Structure of mtDNA Variation in the Holarctic Avian Genus Eremophila 

      Drovetski, Sergei V.; Rakovic, Marko; Semenov, Georgy; Fadeev, Igor V.; Red'kin, Yaroslav A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Phylogeographic studies of Holarctic birds are challenging because they involve vast geographic scale, complex glacial history, extensive phenotypic variation, and heterogeneous taxonomic treatment across countries, all of which require large sample sizes. Knowledge about the quality of phylogeographic information provided by different loci is crucial for study design. We use sequences of one mtDNA ...
    • Living on the edge: conservation genetics of seven thermophilous plant species in a high Arctic archipelago 

      Birkeland, Siri; Skjetne, Idunn Elisabeth Borgen; Brysting, Anne Krag; Elven, Reidar; Alsos, Inger Greve (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-19)
      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 ...
    • Long-distance plant dispersal to North Atlantic islands: colonization routes and founder effect 

      Alsos, Inger Greve; Ehrich, Dorothee; Eidesen, Pernille Bronken; Solstad, Heidi Merethe; Westergaard, Kristine Bakke; Schonswetter, Peter; Tribsch, Andreas; Birkeland, Siri; Elven, Reidar; Brochmann, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-15)
      Long-distance dispersal (LDD) processes influence the founder effect on islands.We use genetic data for 25 Atlantic species and similarities among regional floras to analyse colonization, and test whether the genetic founder effect on five islands is associated with dispersal distance, island size and species traits. Most species colonized postglacially via multiple dispersal events from several ...
    • Long-term decline in egg size of Atlantic puffins Fratercula arctica is related to changes in forage fish stocks and climate conditions 

      Barrett, Robert T.; Nilsen, Erlend Birkeland; Anker-Nilssen, Tycho (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      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 ...
    • Lophium elegans (Ascomycota), a rare European species 

      Mathiassen, Geir Harald; Granmo, Alfred; Rämä, Teppo (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-08)
    • "Lærerforum". Læreres bruk av og vurdering av et nettbasert veiledningstilbud. 

      Lund, Øystein (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      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 ...
    • Maskulinitet og trofejakt i Arktis 

      Aarekol, Lena (Journal article; Tidsskriftartikkel; Peer reviewed, 2015)
      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 ...
    • The Meanings of Landscape: Historical Development, Cultural Frames, Linguistic Variation, and Antonyms 

      Bigell, Werner; Chang, Cheng (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • Melsvik - Brudd og boplass gjennom 8000 år 

      Niemi, Anja Roth; Kjellman, Erik; Oppvang, Janne; Nergaard, Ragnhild Holten (Conference object; Konferansebidrag, 2014)
    • Microsatellite markers for Heracleum persicum (Apiaceae) and allied taxa: application of next-generation sequencing to develop genetic resources for invasive species management 

      Rijal, Dilli Prasad; Falahati-Anbaran, Mohsen; Alm, Torbjørn; Alsos, Inger Greve (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • Minimizing polymerase biases in metabarcoding 

      Nichols, Ruth V.; Vollmers, Christopher; Newsom, Lee A.; Wang, Yue; Heintzman, Peter D.; Leighton, McKenna; Green, Richard E.; Shapiro, Beth (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-24)
      DNA metabarcoding is an increasingly popular method to characterize and quantify biodiversity in environmental samples. Metabarcoding approaches simultaneously amplify a short, variable genomic region, or “barcode,” from a broad taxonomic group via the polymerase chain reaction (PCR), using universal primers that anneal to flanking conserved regions. Results of these experiments are reported as ...
    • Modelled drift patterns of fish larvae link coastal morphology to seabird colony distribution 

      Sandvik, Hanno; Barrett, Robert T.; Erikstad, Kjell E; Myksvoll, Mari Skuggedal; Vikebø, Frode Bendiksen; Yoccoz, Nigel Gilles; Anker-Nilssen, Tycho; Lorentsen, Svein-Håkon; Reiertsen, Tone; Skardhamar, Jofrid; Skern-Mauritzen, Mette; Systad, Geir Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-13)
      Colonial breeding is an evolutionary puzzle, as the benefits of breeding in high densities are still not fully explained. Although the dynamics of existing colonies are increasingly understood, few studies have addressed the initial formation of colonies, and empirical tests are rare. Using a high-resolution larval drift model, we here document that the distribution of seabird colonies along the ...
    • Monument og minne. Mobilisering av fortid - argument for fremtid? 

      Aarekol, Lena (Journal article; Tidsskriftartikkel; Peer reviewed, 2007)
      In 1977 a monument in memory of the Finnish immigrants was erected in Vadsø, the capital town of the county of Finnmark. The unveiling ceremony of the monument was an exceptional event, where the Norwegian king Olav, the Swedish king Carl Gustav and the Finnish president Uhro Kekkonen attended. The purpose of the monument was to pay tribute to the Finnish immigrants and their contribution to the ...
    • The moose throat bot fly Cephenemyia ulrichii larvae (Diptera: Oestridae) found developing in roe deer (Capreolus capreolus) for the first time 

      Isomursu, Marja; Nilssen, Arne C.; Oksanen, Antti (Journal article; Tidsskriftartikkel; Peer reviewed, 2008-06-02)
      About fifty larvae of Cephenemyia ulrichii Brauer (Diptera: Oestridae), some of them nearly fullgrown third instars, were found in the throat of a roe deer (Capreolus capreolus) in June 2007 near Helsinki in Finland. The parasite is considered to be host specific, occurring only in the moose (Alces alces), and this paper is apparently the first report of a successful infestation in an aberrant host.
    • MtDNA ND2 sequence identifies Streaked Horned Lark (Eremophila alpestris strigata) from birdstrike to US Air Force F-15 at Portland International Airport, Oregon 

      Dove, Carla J.; Dahlan, Nor Faridah; Drovetski, Sergei V. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      The Streaked Horned Lark (SHL: Eremophila alpestris strigata) is the Northwest subspecies of the Horned Lark listed as endangered in Washington State, critical in Oregon, and is now being considered for listing as threatened by the US Fish & Wildlife Service. Some of the important breeding areas of SHL are associated with airports in western Washington and Oregon which raises concern over possible ...