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Timing of blooms, algal food quality and Calanus glacialis reproduction and growth in a changing Arctic
TLDR
An extensive field study in the Arctic shelf seas followed the seasonal biomass development of ice algae and phytoplankton and their food quality in terms of their relative PUFA content to identify a potential mismatch between the two primary production peaks of high-quality food and the reproductive cycle of key Arctic grazers.
Ocean temperature oscillations enable reappearance of blue mussels Mytilus edulis in Svalbard after a 1000 year absence
We report the first observations of settled blue mussels Mytilus edulis L. in the high Arctic Archipelago of Svalbard for the first time since the Viking Age. A scattered population was discovered at
Timing of reproductive events in the marine copepod Calanus glacialis: a pan-Arctic perspective
The timing of reproductive events of Calanus glacialis is closely coupled to the two major marine primary production events in the Arctic: the ice algal and phytoplankton blooms. Reproductive strat...
Diel vertical migration of Arctic zooplankton during the polar night
TLDR
It is argued that even during the polar night, DVM is regulated by diel variations in solar and lunar illumination, which are at intensities far below the threshold of human perception, which suggests that the biologically mediated vertical flux of carbon will increase if there is a continued retreat of the Arctic winter sea ice cover.
First records of Atlantic mackerel (Scomber scombrus) from the Svalbard archipelago, Norway, with possible explanations for the extension of its distribution
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
Is the poleward expansion by Atlantic cod and haddock threatening native polar cod, Boreogadus saida?
TLDR
The diet of co-occurring juvenile gadoids in fjords, open water, and sea ice around Svalbard and the available literature on polar cod feeding in different habitats across the Arctic was reviewed to determine whether region, habitat, or fish size may influence diet.
Little auks (Alle alle) breeding in a High Arctic fjord system: bimodal foraging strategies as a response to poor food quality?
TLDR
This is the first study to show a similar feeding pattern in an Alcidae species in the Northern Hemisphere and it is determined that little auks in this colony have a bimodal foraging strategy consisting of long and short foraging trips with two corresponding distinct diets.
Comparison of zooplankton vertical migration in an ice‐free and a seasonally ice‐covered Arctic fjord: An insight into the influence of sea ice cover on zooplankton behavior
We present observations of zooplankton diel vertical migration (DVM) over a period of 2 yr in an ice‐free and a seasonally ice‐covered Arctic fjord. The contrasting environments permitted assessment
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