Now showing items 1-16 of 16

  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Eriksen, Eva Lieungh; Ullerud, Heidrun Asgeirsdatter; Halvorsen, Rune; Aune, Sigrun; Bratli, Harald; Horvath, Peter; Volden, Inger Kristine; Wollan, Anders Kvalvåg; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Questions: Substantial variation between observers has been found when comparing parallel land-cover maps, but how can we know which map is better? What magnitude of error and inter-observer variation is expected when ...
  • Støa, Bente; Halvorsen, Rune; Mazzoni, Sabrina; Gusarov, Vladimir (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    This paper provides a theoretical understanding of sampling bias in presence-only data in the context of species distribution modelling. This understanding forms the basis for two integrated frameworks, one for detecting ...
  • Botnen, Synnøve Smebye; Davey, Marie Louise; Halvorsen, Rune; Kauserud, Håvard (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Analysis of microbial community structure by multivariate ordination methods, using data obtained by high‐throughput sequencing of amplified markers (i.e., DNA metabarcoding), often requires clustering of DNA sequences ...
  • Liu, Hai Ying; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    The aim of this study is to examine the effect of individual canopy tree on the species composition and abundance of understorey vegetation in subtropical forests, by applying a model for tree influence on understorey ...
  • Gange, Alan C.; Heegaard, Einar; Boddy, Lynne; Andrew, Carrie Joy; Kirk, Paul M.; Halvorsen, Rune; Kuyper, Thomas W.; Bässler, Claus; Diez, Jefferey M.; Heilman-Clausen, Jacob; Høiland, Klaus; Büntgen, Ulf; Kauserud, Håvard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Despite the dramatic phenological responses of fungal fruiting to recent climate warming, it is unknown whether spatial distributions of fungi have changed and to what extent such changes are influenced by fungal traits, ...