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HandWiki. Sea Ice Microbial Communities. Encyclopedia. Available online: https://encyclopedia.pub/entry/28907 (accessed on 26 September 2026).
HandWiki. Sea Ice Microbial Communities. Encyclopedia. Available at: https://encyclopedia.pub/entry/28907. Accessed September 26, 2026.
HandWiki. "Sea Ice Microbial Communities" Encyclopedia, https://encyclopedia.pub/entry/28907 (accessed September 26, 2026).
HandWiki. (2022, October 11). Sea Ice Microbial Communities. In Encyclopedia. https://encyclopedia.pub/entry/28907
HandWiki. "Sea Ice Microbial Communities." Encyclopedia. Web. 11 October, 2022.
Sea Ice Microbial Communities
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The content is sourced from: https://handwiki.org/wiki/Earth:Sea_ice_microbial_communities

Sea Ice Microbial Communities (SIMCO) refer to groups of microorganisms living within and at the interfaces of sea ice at the poles. The ice matrix they inhabit has strong vertical gradients of salinity, light, temperature and nutrients. Sea ice chemistry is most influenced by the salinity of the brine which affects the pH and the concentration of dissolved nutrients and gases. The brine formed during the melting sea ice creates pores and channels in the sea ice in which these microbes can live. As a result of these gradients and dynamic conditions, a higher abundance of microbes are found in the lower layer of the ice, although some are found in the middle and upper layers. Despite this extreme variability in environmental conditions, the taxonomical community composition tends to remain consistent throughout the year, until the ice melts. Much of the knowledge concerning the community diversity of the sea ice is known through genetic analyses and next-generation sequencing. In both the Arctic and Antarctic, Alphaproteobacteria, Gammaproteobacteria and Flavobacteriia are the common bacterial classes found. Most sea ice Archaea belong to the phylum Nitrososphaerota while most of the protists belong to one of 3 supergroups: Alveolata, Stramenopile and Rhizaria. The abundance of living cells within and on sea ice ranges from 104-108 cells/mL. These microbial communities play a significant role in the microbial loop as well as in global biogeochemical cycles. Sea ice communities are important because they provide an energy source for higher trophic levels, they contribute to primary production and they provide a net influx of Carbon in the oceans at the poles.

alveolata microbial loop biogeochemical

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