Browsing Museene by Author "Halvorsen, Rune"

Now showing items 1-20 of 36

  • A comparison of three ways to assemble wall-to-wall maps from distribution models of vegetation types 
    Horvath, Peter; Halvorsen, Rune; Simensen, Trond; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Distribution modeling methods are used to provide occurrence probability surfaces for modeled targets. While most often used for modeling species, distribution modeling methods can also be applied to vegetation types. ...
  • Advancing restoration ecology: A new approach to predict time to recovery 
    Rydgren, Knut; Halvorsen, Rune; Töpper, Joachim Paul; Auestad, Inger; Hamre, Liv Norunn; Jongejans, Eelke; Sulavik, Jan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    1. Species composition is a vital attribute of any ecosystem. Accordingly, ecological restoration often has the original, or “natural,” species composition as its target. However, we still lack adequate methods for predicting ...
  • Age matters: Demographic senescence in the moss Polytrichastrum formosum 
    Tholstrup, Ditte Wiig; Halvorsen, Rune; Dahlgren, Johan P. (Journal article / Tidsskriftartikkel / SubmittedVersion, 2021)
    1. It is known that many animal species senesce demographically, showing a decrease in survival and/or fertility with age. Although there is mounting evidence for and against senescence in various flowering plant species, ...
  • Assessing recovery of alpine spoil heaps by vascular plant, bryophyte, and lichen functional traits 
    Sulavik, Jan; Auestad, Inger; Halvorsen, Rune; Rydgren, Knut (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Functional traits are linked to ecosystem processes and services and therefore relevant in recovery assessment. However, traits of bryophytes and lichens, important components of many ecosystems, have received less attention ...
  • Assessing restoration success by predicting time to recovery- But by which metric? 
    Rydgren, Knut; Auestad, Inger; Halvorsen, Rune; Hamre, Liv Norunn; Jongejans, Eelke; Töpper, Joachim Paul; Sulavik, Jan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    1. Restoration of degraded ecosystems may take decades or even centuries. Accordingly, information about the current direction and speed of recovery provided by methods for predicting time to recovery may give important ...
  • Bunching up the background betters bias in species distribution models 
    Vollering, Julien Martin Marie; Halvorsen, Rune; Auestad, Inger; Rydgren, Knut (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Sets of presence records used to model species’ distributions typically consist of observations collected opportunistically rather than systematically. As a result, sampling probability is geographically uneven, which may ...
  • Characterisation and mapping of landscape types, a case study from Norway 
    Erikstad, Lars; Uttakleiv, Lars Andre; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The European Landscape Convention emphasises the human perception of landscapes in its definition of the landscape, and promotes citizen participation in landscape management processes. On the other hand, landscape definitions ...
  • Climate change drives substantial decline of understorey species richness and abundance in Norway spruce forests during 32 years of vegetation monitoring 
    Økland, Tonje; Halvorsen, Rune; Lange, Holger; Nordbakken, Jørn-Frode; Clarke, Nicholas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Questions Observations in permanent forest vegetation plots in Norway and elsewhere indicate that complex changes have taken place over the period 1988–2020. These observations are summarised in the “climate-induced ...
  • Composite landscape predictors improve distribution models of ecosystem types 
    Simensen, Trond; Horvath, Peter; Vollering, Julien; Erikstad, Lars; Halvorsen, Rune; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aim: Distribution modelling is a useful approach to obtain knowledge about the spatial distribution of biodiversity, required for, for example, red-list assessments. While distribution modelling methods have been applied ...
  • Different bacterial communities in ectomycorrhizae and surrounding soil 
    Vik, Unni; Logares, Ramiro; Blaalid, Rakel; Halvorsen, Rune; Carlsen, Tor; Bakke, Ingrid; Kolstø, Anne-Brit; Økstad, Ole Andreas Løchen; Kauserud, Håvard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Several eukaryotic symbioses have shown to host a rich diversity of prokaryotes that interact with their hosts. Here, we study bacterial communities associated with ectomycorrhizal root systems of Bistorta vivipara compared ...
  • Diversity and distribution of landscape types in Norway 
    Simensen, Trond; Erikstad, Lars; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Norwegian landscapes are changing at an increasingly rapid rate and therefore systematically structured information about observable landscape variation is required for knowledge-based management of landscape diversity. ...
  • DNA Sequencing Historical Lichen Specimens 
    Kistenich, Sonja; Halvorsen, Rune; Schrøder-Nielsen, Audun; Thorbek, Birgitte Lisbeth Graae; Timdal, Einar; Bendiksby, Mika (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Biological specimens in natural history collections worldwide are increasingly being used in biogeographical, environmental, and taxonomic studies. For their meaningful use, correct species identification is crucial. For ...
  • Ectomycorrhizal and saprotrophic fungi respond differently to long-term experimentally increased snow depth in the High Arctic 
    Mundra, Sunil; Halvorsen, Rune; Kauserud, Håvard; Bahram, Mohammad; Tedersoo, Leho; Elberling, Bo; Cooper, Elisabeth J.; Eidesen, Pernille Bronken (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    Changing climate is expected to alter precipitation patterns in the Arctic, with consequences for subsurface temperature and moisture conditions, community structure, and nutrient mobilization through microbial belowground ...
  • European mushroom assemblages are darker in cold climates 
    Krah, Franz-Sebastian; Büntgen, Ulf; Schaefer, Hanno; Müller, Jörg; Andrew, Carrie; Boddy, Lynne; Diez, Jeffrey; Egli, Simon; Freckleton, Robert; Gange, Alan C.; Halvorsen, Rune; Heegaard, Einar; Heideroth, Antje; Heibl, Christoph; Heilmann-Clausen, Jacob; Høiland, Klaus; Kar, Ritwika; Kauserud, Håvard; Kirk, Paul M.; Kuyper, Thomas W.; Krisai-Greilhuber, Irmgard; Nordén, Jenni; Papastefanou, Phillip; Senn-Irlet, Beatrice; Bässler, Claus (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Thermal melanism theory states that dark-colored ectotherm organisms are at an advantage at low temperature due to increased warming. This theory is generally supported for ectotherm animals, however, the function of colors ...
  • European mushroom assemblages are phylogenetically structured by temperature 
    Bässler, Claus; Heilmann-Clausen, Jacob; Andrew, Carrie; Boddy, Lynne; Büntgen, Ulf; Diez, Jeffrey; Heegaard, Einar; Egli, Simon; Gange, Alan C.; Halvorsen, Rune; Kauserud, Håvard; Kirk, Paul M.; Krisai-Greilhuber, Irmgard; Kuyper, Thomas W.; Nordén, Jenni; Senn-Irlet, Beatrice; Krah, Franz-Sebastian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Recent global warming affects species compositions at an unprecedented rate. To predict climate-induced changes in species assemblages, a better understanding of the link between species occurrence and climate is needed. ...
  • Gradient analysis of landscape variation in Norway 
    Simensen, Trond; Halvorsen, Rune; Erikstad, Lars (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract A multitude of landscape characterisation and mapping methods exist, but few methods take into account that landscapes properties vary in a gradual, continuous manner along multiple directions of variation. ...
  • Hovedveileder for feltbasert kartlegging av terrestrisk, limnisk og marin naturvariasjon etter NiN 
    Bryn, Anders; Bekkby, Trine; Dervo, Børre Kind; Dolan, Margaret; Halvorsen, Rune (Research report / Forskningsrapport, 2020)
    Formålet med veilederen er å fylle det kunnskapsrommet som trengs for å bruke natursystemnivået i NiN til feltbasert kartlegging; både til opplæring av nye kartleggere, til hjelp ved utlysning av oppdrag, og som veiledning ...
  • Hovedveileder for kartlegging av terrestrisk naturvariasjon i Norge (Version 2.2.0). Utgave 1. NiN-artikkel 7. 
    Bryn, Anders; Halvorsen, Rune; Ullerud, Heidrun Asgeirsdatter (Research report / Forskningsrapport, 2018)
  • Improving procedures for obtaining Sanger sequences from old herbarium specimens 
    Bendiksby, Mika; Thorbek, Birgitte Lisbeth Graae; Bjorå, Charlotte Sletten; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Because DNA degrades over time, extracting DNA of sufficient quality for sequencing is presumed to be more difficult from older than younger herbarium specimens. Although massive parallel sequencing techniques have clear ...
  • Improving the representation of high-latitude vegetation distribution in dynamic global vegetation models 
    Horvath, Peter; Tang, Hui; Halvorsen, Rune; Stordal, Frode; Tallaksen, Lena M.; Berntsen, Terje Koren; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Vegetation is an important component in global ecosystems, affecting the physical, hydrological and biogeochemical properties of the land surface. Accordingly, the way vegetation is parameterized strongly influences ...