Diatom abundance and fatty acid composition of ice algae and of Calanus glacialis in samples obtained in 2008 in the eastern Beaufort Sea ...

• Main Authors: Wold, Anette, Darnis, Gerald, Søreide, Janne E, Leu, Eva, Philippe, Benoit, Fortier, Louis, Poulin, Michel, Kattner, Gerhard, Graeve, Martin, Falk-Petersen, Stig
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: AWI; International Polar Year 2007-2008 IPY; Amundsen Gulf; Beaufort Sea; Calanus glacialis; ice algae; International Polar Year; IPY; Phytoplankton; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.817986; https://doi.pangaea.de/10.1594/PANGAEA.817986

The copepod Calanus glacialis plays a key role in the lipid-based energy flux in Arctic shelf seas. By utilizing both ice algae and phytoplankton, this species is able to extend its growth season considerably in these seasonally ice-covered seas. This study investigated the impacts of the variability in timing and extent of the ice algal bloom on the reproduction and population success of C. glacialis. The vertical distribution, reproduction, amount of storage lipids, stable isotopes, fatty acid and fatty alcohol composition of C. glacialis were assessed during the Circumpolar Flaw Lead System Study. Data were collected in the Amundsen Gulf, south-eastern Beaufort Sea, from January to July 2008 with the core-sampling from March to April. The reduction in sea ice thickness and coverage observed in the Amundsen Gulf in 2007 and 2008 affected the life strategy and reproduction of C. glacialis. Developmental stages CIII and CIV dominated the overwintering population, which resulted in the presence of very few CV ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...