Browsing Naturhistorisk museum by Title

Now showing items 169-188 of 338

  • Large-sized ichthyosaurs from the Lower Saurian niveau of the Vikinghøgda Formation (Early Triassic), Marmierfjellet, Spitsbergen 
    Engelschiøn, Victoria Sjøholt; Delsett, Lene Liebe; Roberts, Aubrey Jane; Hurum, Jørn Harald (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Humeri of Pessopteryx nisseri and vertebrae referred to Cymbospondylus sp. are described from the Lower Saurian niveau at Marmierfjellet, Spitsbergen. This is the most well-preserved Cymbospondylus material described from ...
  • layeranalyzer: Inferring correlative and causal connections from time series data in R 
    Reitan, Trond; Liow, Lee Hsiang (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    1. Distinguishing correlative and causal connections among time series is an important challenge in evolutionary biology, ecology, macroevolution and palaeobiology. 2. Here, we present layeranalyzer, an r package that ...
  • Lecidea toensbergii, the first described sorediate species in Lecidea sensu stricto 
    Haugan, Reidar; Timdal, Einar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    A molecular phylogenetic analysis based on the DNA barcode marker (nrITS) of 12 specimens of Lecidea leucothallina revealed three monophyletic clades, two apotheciate and one sorediate. The sorediate clade is described as ...
  • Lecidella varangrica sp. nov. from the Varanger Peninsula, northernmost Norway 
    Haugan, Reidar; Tønsberg, Tor (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The new species Lecidella varangricaHaugan & Tønsberg is described from the northern shores of the Varanger Peninsula, Finnmark, Norway. It probably belongs to the saxicolous L. asemagroup by having ...
  • Ledra aurita (Linnaeus, 1758) (Hem., Cicadellidae) rediscovered in Norway 
    Hansen, Lars Ove; Fjellstad, Bjørn, M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1998)
    The remarkable leafhopper Ledra aurita (Linnaeus, 1758) has been rediscovered in Norway. Three specimens were captured at light at Ø, Hvaler: Asmaløy (EIS 12) in July-Aug. 1995. An unpublished record from AK, Frogn: Drøbak ...
  • Linking geology and microbiology: Inactive pockmarks affect sediment microbial community structure 
    Haverkamp, Thomas Hendricus Augustus; Hammer, Øyvind; Jakobsen, Kjetill Sigurd (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Pockmarks are geological features that are found on the bottom of lakes and oceans all over the globe. Some are active, seeping oil or methane, while others are inactive. Active pockmarks are well studied since they harbor ...
  • 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 / PublishedVersion; Peer reviewed, 2015)
    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 ...
  • Loss of semi-natural grassland in a boreal landscape: impacts of agricultural intensification and abandonment 
    Aune, Sigrun; Bryn, Anders; Hovstad, Knut Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The long history of human land use have had a strong influence on ecosystems and landscapes in the boreal forest region of Northern Europe and created semi-natural habitats of high conservation value. In this study, we ...
  • Major histocompatibility complex and mate choice in two passerine birds 
    Rekdal, Silje Larsen (Doctoral thesis / Doktoravhandling, 2020)
    All organisms need to fight pathogens to avoid infectious diseases. In vertebrates, two classes of polymorphic genes from the major histocompatibility complex (MHC) are crucial for triggering immune responses against ...
  • Making the case for a formal Anthropocene Epoch: An analysis of ongoing critiques 
    Zalasiewicz, Jan; Waters, Colin N.; Wolfe, Alexander P.; Barnosky, Anthony D.; Cearreta, Alejandro; Edgeworth, Matt; Ellis, Erle C.; Fairchild, Ian J.; Gradstein, Felix M; Grinevald, Jacques; Haff, Peter K.; Head, Martin J; do Sul, Juliana A. Ivar; Jeandel, Catherine; Leinfelder, Reinhold; McNeill, John R.; Oreskes, Naomi; Poirier, Clement; Revkin, Andrew; Richter, Daniel DeB.; Steffen, Will; Summerhayes, Colin; Syvitski, James P.; Vidas, Davor; Wagreich, Michael; Wing, Scott L.; Williams, Mark (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    A range of published arguments against formalizing the Anthropocene as a geological time unit have variously suggested that it is a misleading term of non-stratigraphic origin and usage, is based on insignificant temporal ...
  • Mapping of marine benthic invertebrates in the Oslofjord and the Skagerrak: sampling data of museum collections from 1950–1955 and from recent investigations 
    Oug, Eivind; Christiansen, Marit Ellen; Dobbe, Kristine; Rønning, Ann-Helen; Bakken, Torkild; Kongsrud, Jon Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Data from large sampling programmes for the mapping of marine invertebrates in the Oslofjord, Norway, and the Skagerrak, spanning more than six decades, are compiled and digitized to provide easy access in modern data ...
  • Marine connectivity dynamics: clarifying cosmopolitan distributions of marine interstitial invertebrates and the meiofauna paradox 
    Cerca De Oliveira, Josè; Purschke, Günter; Struck, Torsten H (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    Many interstitial species were first described as widely distributed, often cosmopolitan or amphi-oceanic, contrasting with descriptions of a sedentary life style and the general absence of pelagic dispersal stages. These ...
  • Measuring sperm swimming performance in birds: effects of dilution, suspension medium, mechanical agitation, and sperm number 
    Cramer, Emily Rebecca A; Rowe, Melissah; Eroukhmanoff, Fabrice; Lifjeld, Jan Terje; Sætre, Glenn-Peter; Johnsen, Arild (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Sperm swimming performance, including swimming speed and the proportion of motile cells, may strongly affect fertilization success. However, little is known about how methodological factors affect in vitro measurement of ...
  • Medicinal and aromatic plant cultivation in the Swat valley, north-western Pakistan, for economic development and biodiversity conservation 
    Sher, Hassan; Barkworth, Mary E.; de Boer, Hugo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Most people in the Swat valley of northwest Pakistan practice subsistence farming, supplementing their income by collecting and selling wild harvested plants for use in herbal medicine. Previous work showed that the ...
  • Meeting Report: GBIF hackathon-workshop on Darwin Core and sample data (22-24 May 2013) 
    Wieczorek, John; Bánki, Olaf; Blum, Stan; Deck, John; Döring, Markus; Dröge, Gabriele; Endresen, Dag Terje Filip; Goldstein, Philip; Leary, Patrick; Krishtalka, Leonard; Ó Tuama, Éamonn; Robbins, Robert J.; Robertson, Tim; Yilmaz, Pelin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    The workshop-hackathon was convened by the Global Biodiversity Information Facility (GBIF) at its secretariat in Copenhagen over 22-24 May 2013 with additional support from several projects (RCN4GSC, EAGER, VertNet, BiSciCol, ...
  • Mesozoic marine reptiles from Spitsbergen and their ecosystems 
    Delsett, Lene Liebe; Druckenmiller, Patrick Scott; Hammer, Øyvind; Hryniewicz, Krzysztof; Knutsen, Espen Madsen; Koevoets, Maayke Jacqueline; Nakrem, Hans Arne; Roberts, Aubrey Jane; Hurum, Jørn Harald (Journal article / Tidsskriftartikkel / SubmittedVersion, 2019)
    In the Mesozoic seas, the apex predators were reptiles. From the Arctic archipelago of Svalbard, the Spitsbergen Mesozoic Research Group has excavated numerous well preserved marine reptile skeletons in order to understand ...
  • The MIAmaxent R package: Variable transformation and model selection for species distribution models 
    Vollering, Julien; Halvorsen, Rune; Mazzoni, Sabrina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The widely used “Maxent” software for modeling species distributions from presence‐only data (Phillips et al., Ecological Modelling, 190, 2006, 231) tends to produce models with high‐predictive performance but low‐ecological ...
  • MIAT: Modular R-wrappers for flexible implementation of MaxEnt distribution modelling 
    Mazzoni, Sabrina; Halvorsen, Rune; Bakkestuen, Vegar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The maximum entropy (MaxEnt) method has gained widespread use for distribution modelling, mostly because of the practical simplicity offered by the maxent.jar software. Whilst MaxEnt was originally described as a machine ...
  • Microhabitat change drives diversification in pholcid spiders 
    Eberle, Jonas; Dimitrov, Dimitar; Valdez-Mondragón, Alejandro; Huber, Bernhard A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Background Microhabitat changes are thought to be among the main drivers of diversification. However, this conclusion is mostly based on studies on vertebrates. Here, we investigate the influence of ...
  • MicroRNA preparations from individual monogenean Gyrodactylus salaris-a comparison of six commercially available totalRNA extraction kits 
    Fromm, Bastian; David Harris, Philip; Bachmann, Lutz (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 ...