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Potential misidentifications of two climate indicator species of the marine arctic ecosystem: Calanus glacialis and C. finmarchicus
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
Calanoid copepods of the genus Calanus represent an important, nutrient-rich food source for a multitude of Arctic marine organisms. Although morphologically very similar, their life histories and ecological roles differ. Because the distribution of Calanus glacialis and C. finmarchicus corresponds to Arctic and Atlantic water masses, respectively, they are regularly used as climate indicators. A ...
Evolution of the Arctic Calanus complex: an Arctic marine avocado?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
Before man hunted the large baleen whales to near extinction by the end of the nineteenth century, Arctic ecosystems were strongly influenced by these large predators. Their main prey were zooplankton, among which the calanoid copepod species of the genus Calanus, long considered key elements of polar marine ecosystems, are particularly abundant. These herbivorous zooplankters display a range of ...
Bioluminescence in the high Arctic during the polar night
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
This study examines the composition and activity of the planktonic community during the polar night in the high Arctic Kongsfjord, Svalbard. Our results are the first published evidence of bioluminescence among zooplankton during the Arctic polar night. The observations were collected by a bathyphotometer detecting bioluminescence, integrated into an autonomous underwater vehicle, to determine the ...
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. ...
Retention of ice-associated amphipods: possible consequences for an ice-free Arctic Ocean
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012-09-12)
Recent studies predict that the Arctic Ocean will
have ice-free summers within the next 30 years.
This poses a significant challenge for the marine
organisms associated with the Arctic sea ice,
such as marine mammals and, not least, the iceassociated crustaceans generally considered to
spend their entire life on the underside of the
Arctic sea ice. Based upon unique samples collected within ...