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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)
Aspects of the life history of the Atlantic poacher, Leptagonus decagonus, in Svalbard waters
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-25)
The aim of the study is to describe aspects of the life history of the Atlantic poacher (Leptagonus decagonus) obtained during early October 2010 and late September 2011 from the Hinlopen Strait, located between Nordaustlandet and the Spitsbergen Archipelago. Length was measured for 142 individuals, and 82 out of these were weighed, sexed and the age in years determined. The sex distribution in the ...
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 ...
Macroalgal detritus and food-web subsidies along an Arctic fjord depth-gradient
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-05)
Tight coupling between pelagic and benthic communities is accepted as a general principle on Arctic shelves. Whereas this paradigm has been useful for guiding ecological research, it has perhaps led to a disproportionate focus on POM and ice algae as the most likely sources of carbon for the benthic food web. Arctic shelves are complex systems, including banks, fjords, and trough systems up to 350 ...
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 ...
First records of Atlantic mackerel (Scomber scombrus) from the Svalbard archipelago, Norway, with possible explanations for the extension of its distribution
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03)
Atlantic mackerel (Scomber scombrus) were recorded in Isfjorden, Svalbard (78˚15ʹ N, 15˚11ʹ E) in late
September 2013. This record is the northernmost known occurrence of mackerel in the Arctic and represents a possible
northward expansion (of ca. 5˚ latitude) of its distributional range. The examined specimens of mackerel were between 7
and 11 years old, with a mean size of 39 cm and a mean ...
Aspects of reproductive biology of wild-caught polar cod (Boreogadus saida) from Svalbard waters
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-27)
Polar cod (Boreogadus saida) is considered a
key species in the Arctic marine ecosystems. Yet detailed
or even basic knowledge regarding its biology and adaptations,
especially during the polar night, is in many cases
poor. Data are presently unavailable in Western literature
on the gonad development of polar cod and its reproductive
biology in wild specimens. Accordingly, gonad development
of ...
Is ambient light during the high Arctic polar night sufficient to act as a visual cue for zooplankton?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-03)
The light regime is an ecologically important factor in pelagic habitats, influencing a range of
biological processes. However, the availability and importance of light to these processes in
high Arctic zooplankton communities during periods of 'complete' darkness (polar night) are
poorly studied. Here we characterized the ambient light regime throughout the diel cycle
during the high Arctic ...