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The origin of cyanobacteria in Antarctic sea ice: Marine or freshwater?
journal contribution
posted on 2023-05-18, 04:13 authored by Koh, EY, Cowie, ROM, Simpson, AM, O'Toole, RF, Ryan, KGCyanobacteria play an important role in the primary productivity of many ecosystems and are dominant in non-marine polar environments. Apart from detecting low levels of cyanobacteria-like pigments in the Southern Ocean, little effort has been spent in trying to elucidate Cyanobacteria in Antarctic sea ice. Here, we report the first use of culture, microscope, microarray and molecular techniques to show that marine Cyanobacteria are rare or absent in sea ice. Our infrequent positive signals were most closely related to freshwater Cyanobacteria from neighbouring terrestrial sources, which illustrates our techniques were sensitive enough to find sea-ice cyanobacteria if they were present. It is still possible that minute quantity of marine cyanobacteria may exist in sea ice and do not contribute significantly to the polar marine ecosystems.
History
Publication title
Environmental Microbiology ReportsVolume
4Issue
5Pagination
479-483ISSN
1758-2229Department/School
Tasmanian School of MedicinePublisher
Wiley-Blackwell Publishing Ltd.Place of publication
United KingdomRepository Status
- Restricted