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Microsatellite markers for Heracleum persicum (Apiaceae) and allied taxa: application of next-generation sequencing to develop genetic resources for invasive species management
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
Characterization of 14 microsatellite markers for Silene acaulis (Caryophyllaceae)
(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 ...
Biological introduction risks from shipping in a warming Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-14)
Several decades of research on invasive marine species have yielded a broad understanding of the nature of species invasion mechanisms and associated threats globally. However, this is not true of the Arctic, a region where ongoing climatic changes may promote species invasion. Here, we evaluated risks associated with non-indigenous propagule loads discharged with ships' ballast water to the high-Arctic ...
Reconstructing the invasion history of Heracleum persicum (Apiaceae) into Europe
(Journal article; Tidsskriftartikkel, 2015-11-06)
Sparse, incomplete and inappropriate historical records of invasive species often hamper invasive species management interventions. Population genetic analyses of invaders might provide a suitable context for the identification of their source populations and possible introduction routes. Here, we describe the population genetics of Heracleum persicum Desf. ex Fisch and trace its route of introduction ...
Trans-Atlantic genetic uniformity in the rare snowbed sedge Carex rufina
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
The red-listed, amphi-Atlantic sedge Carex rufina is highly specialized to certain alpine snowbeds, and threatened by current changes in snow cover duration and moisture conditions. Here we address its range-wide genetic diversity, history, and conservation using amplified fragment length polymorphisms (AFLPs). Despite extensive primer testing, we detected very low overall diversity (4.1% polymorphic ...
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
(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 ...
Past Arctic aliens have passed away, current ones may stay
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-04)
Increased human activity and climate change are expected to increase the numbers and impact of alien species in the Arctic, but knowledge of alien species is poor in most Arctic regions. Through field investigations over the last 10 years, and review of alien vascular plant records for the high Arctic Archipelago Svalbard over the past 130 years, we explored long term trends in persistence and ...
Long-distance plant dispersal to North Atlantic islands: colonization routes and founder effect
(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 ...
Circumpolar Arctic vegetation: a hierarchic review and roadmap toward an internationally consistent approach to survey, archive and classify tundra plot data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-10)
Satellite-derived remote-sensing products are providing a modern circumpolar perspective of Arctic vegetation and its changes, but this new view is dependent on a long heritage of ground-based observations in the Arctic. Several products of the Conservation of Arctic Flora and Fauna are key to our current understanding.Wereview aspects of the PanArctic Flora, the Circumpolar Arctic Vegetation ...
Sedimentary ancient DNA from Lake Skartjørna, Svalbard: Assessing the resilience of arctic flora to Holocene climate change
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-11)