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At the rainbow's end: high productivity fueled by winter upwelling along an Arctic shelf
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015)
Lipid sac area as a proxy for individual lipid content of arctic calanoid copepods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
We present an accurate, fast, simple and non-destructive photographic method to estimate wax ester and lipid content in single individuals of the calanoid copepod genus Calanus and test this method against gas-chromatographic lipid measurements.
Introduction to the special issue on polar night studies conducted onboard RV Helmer Hanssen in the Svalbard area
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
Arctic complexity: A case study on diel vertical migration of zooplankton
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
In the dark: a review of ecosystem processes during the Arctic polar night
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-28)
Several recent lines of evidence indicate that the polar night is key to understanding Arctic marine
ecosystems. First, the polar night is not a period void of biological activity even though primary production
is close to zero, but is rather characterized by a number of processes and interactions yet to be fully
understood, including unanticipated high levels of feeding and reproduction in a ...
The amphipod scavenging guild in two Arctic fjords : seasonal variations, abundance and trophic interactions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
Scavenging amphipods are important for the circulation and dispersal of organic material in the marine environment. Despite their dominance in the scavenging guild and importance in the food web, little is known about Arctic amphipods and their feeding preferences. We studied the amphipod scavenging guild using baited traps for one full year to increase our understanding of its seasonal variations. ...
Seasonal and diel vertical migration of zooplankton in the High Arctic during the autumn midnight sun of 2008
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
The diel vertical migration (DVM) of Calanus (Calanus finmarchicus, Calanus glacialis and Calanus hyperboreus) and Metridia longa was investigated in August 2008 at six locations to the north and northwest of Svalbard (Rijpfjorden, Ice, Marginal Ice Zone, Shelf break, Shelf and Kongsfjorden). Despite midnight sun conditions, a diel light cycle was clearly observed at all stations. We collected data ...
Pelagic food-webs in a changing Arctic: a trait-based perspective suggests a mode of resilience
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-27)
Arctic marine ecosystems support fisheries of significant and increasing economic and nutritional value. Commercial stocks are sustained by pelagic food webs with relatively few keystone taxa mediating energy transfer to higher trophic levels, and it remains largely unknown how these taxa will be affected by changing climate and the influx of boreal taxa. <i>Calanus</i> species store large quantities ...
Tiny but fatty: Lipids and fatty acids in the daubed shanny (Leptoclinus maculatus), a small fish in Svalbard waters
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-28)
The seasonal dynamic of lipids and their fatty acid constituents in the lipid sac and muscles of pelagic postlarval <i>Leptoclinus maculatus</i>, an ecologically important fish species in the Arctic food nets, in Kongsfjord, Svalbard waters was studied. The determination of the qualitative and quantitative content of the total lipids (TLs), total phospholipids (PLs), triacylglycerols (TAGs), cholesterol ...
Connections to the Deep: Deep Vertical Migrations, an Important Part of the Life Cycle of Apherusa glacialis, an Arctic Ice-Associated Amphipod
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-15)
Arctic sea ice contains a substantial amount of living biota of which part is lost through
melt and export out of the Arctic Ocean every year. It is unclear how populations can
be maintained within the Arctic Ocean. A representative ice inhabitant, the amphipod
Apherusa glacialis was previously assumed to spend its entire life in the sea ice habitat,
hence being dependent on sea ice to complete ...