SEA ICE DIATOMS AND ICE EDGE PLANKTONIC DIATOMS AT THE NORTHERN LIMIT OF THE

• Main Authors: Weddell Sea, Pack Ice, Ryszard Ligowski, Miroslaw Godlewski, Aleksy Lukowski
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: South Orkney Islands; Antarc*; Antarctica; Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.623.658; http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1992-Ligowski.pdf

Abstract: Drifting brash ice and phytoplankton were collected between Ele-phant Island and South Orkney Islands during the period from late December 1988 to mid-January 1989. In diatom assemblages from the sea ice, the highest oc-currence was displayed by Nitzschia curta, N. cylindrus and N. neglecta. In phy-toplankton assemblages the highest occurrence was shown by Nitzschia curta, Actinocyclus actinochilus, Chaetoceros criophilum, Corethron criophilum, Thalas-siothrix antarctica and Nitzschia cylindrus. In the dendrogram of similarities of species composition, two groups of stations were distinguished. The first one was composed of the phytoplankton stations and the second one was composed of the sea ice stations. Microautoradiographic analysis revealed photosynthesis in diatoms from plankton and no photosynthesis in diatoms from brash ice after ice melting. Therefore, the sea ice diatoms could not be regarded as an inoculum for the phytoplankton diatoms in the area studied. 1.