Plankton biomass, POC and PON concentrations, and sinking velocities during the 2008 spring diatom bloom in Disko Bay ...

• Main Authors: Dünweber, Michael, Swalethorp, Rasmus, Kjellerup, Sanne, Nielsen, Torkel Gissel, Arendt, Kristine Engel, Hjorth, Morten, Tönnesson, Kajsa, Møller, Eva Friis
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: International Polar Year 2007-2008 IPY; Greenland; Disko Bay; International Polar Year; IPY; Mesozooplankton; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.809471; https://doi.pangaea.de/10.1594/PANGAEA.809471

Phytoplankton and copepod succession was investigated in Disko Bay, western Greenland from February to July 2008. The spring phytoplankton bloom developed immediately after the breakup of sea ice and reached a peak concentration of 24 mg chl a/m**3 2 wk later. The bloom was analyzed during 3 phases: the developing, the decaying, and the post-bloom phases. Grazing impact by the copepod community was assessed by 4 methods; gut fluorescence, in situ faecal pellet production, and egg and faecal pellet production from bottle incubations. Calanus spp. dominated the mesozooplankton community. They were present from the initiation of the bloom but only had a small grazing impact on the phytoplankton. Consequently, there was a close coupling between the spring phytoplankton bloom and sedimentation of particulate organic carbon (POC). Out of 1836 ±180 mg C/m**2/d leaving the upper 50 m, 60 % was phytoplankton based carbon (PPC). The composition and quality of the sedimenting material changed throughout the bloom ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...