Blar i forfatter Norges arktiske universitetsmuseum "Eidesen, Pernille Bronken"

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    • Characterization of 14 microsatellite markers for Silene acaulis (Caryophyllaceae) 

      Müller, Eike; Hlavackova, Iva; Svoen, Mildrid Elvik; Alsos, Inger Greve; Eidesen, Pernille Bronken (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-08)
      Premise of the study: Fifty candidate microsatellite markers, generated using 454 shotgun sequencing, were tested for the widespread arctic/alpine herb Silene acaulis (Caryophyllaceae). Methods and Results: Fourteen out of 50 markers resulted in polymorphic products with profiles that enabled interpretation. The numbers of alleles per locus ranged from two to six, and the expected heterozygosity ...

    • Germinating seeds or bulbils in 87 of 113 tested Arctic species indicate potential for ex situ seed bank storage 

      Alsos, Inger Greve; Müller, Eike; Eidesen, Pernille Bronken (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Arctic plant species are expected to lose range due to climate change. One approach to preserve the genetic and species diversity for the future is to store propagules in seed vaults. However, germinability of seeds is assumed to be low for Arctic species. We evaluated ex situ storage potential of 113 of the 161 native angiosperms of Svalbard by studying seed ripening and germination. Seeds or bulbils ...

    • 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 ...

    • Range shifts and global warming: ecological responses of Empetrum nigrum L. to experimental warming at its northern (high Arctic) and southern (Atlantic) geographical range margin 

      Buizer, B; Weijers, S; van Bodegom, PM; Alsos, Inger Greve; Eidesen, Pernille Bronken; van Breda, J; de Korte, M; van Rijckevorsel, J; Rozema, J (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Global change is expected to lead to range shifts of plant species. The ecological mechanisms underpinning these shifts are currently not well understood. Here, we compared ecological responses possibly underlying southern range contraction and northern range expansion of Empetrum nigrum, a key species in northern heathlands, which may be related to global change. We hypothesized a negative ...

    • Tetraploids do not form cushions: association of ploidy level, growth form and ecology in the High Arctic Saxifraga oppositifolia L. s. lat. (Saxifragaceae) in Svalbard 

      Eidesen, Pernille Bronken; Müller, Eike; Lettner, Christian; Alsos, Inger Greve; Bender, Morgan; Kristiansen, Martin; Peeters, Bart; Postma, Froukje; Verweij, Koen Frans (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Saxifraga oppositifolia L. is a common circumpolar plant species that displays considerable morphological and genetic variation throughout its range. It is mainly diploid, but tetraploids are reported from several regions. The growth form varies from prostate to cushion-shaped, and the plant thrives in wet snow beds as well as on dry ridges. This variation has triggered the curiosity of ...