Naturwissenschaften

, Volume 87, Issue 3, pp 137–141

Ice Shelf Microbial Ecosystems in the High Arctic and Implications for Life on Snowball Earth

Authors

  • W. F. Vincent
    • Centre d'Études Nordiques, Université Laval, Sainte-Foy QC G1K 7P4, Canada e-mail: warwick.vincent@bio.ulaval.ca, Tel.: +1-418-6565644, Fax: +1-418-6562043
  • J. A. E. Gibson
    • Centre d'Études Nordiques, Université Laval, Sainte-Foy QC G1K 7P4, Canada e-mail: warwick.vincent@bio.ulaval.ca, Tel.: +1-418-6565644, Fax: +1-418-6562043
  • R. Pienitz
    • Centre d'Études Nordiques, Université Laval, Sainte-Foy QC G1K 7P4, Canada e-mail: warwick.vincent@bio.ulaval.ca, Tel.: +1-418-6565644, Fax: +1-418-6562043
  • V. Villeneuve
    • Centre d'Études Nordiques, Université Laval, Sainte-Foy QC G1K 7P4, Canada e-mail: warwick.vincent@bio.ulaval.ca, Tel.: +1-418-6565644, Fax: +1-418-6562043
  • P. A. Broady
    • Department of Plant and Microbial Sciences, University of Canterbury, Christchurch, New Zealand
  • P. B. Hamilton
    • Canadian Museum of Nature, Ottawa, ON KIP 6P4, Canada
  • C. Howard-Williams
    • National Institute of Water and Atmospheric Research, Christchurch, New Zealand
SHORT COMMUNICATION

DOI: 10.1007/s001140050692

Cite this article as:
Vincent, W., Gibson, J., Pienitz, R. et al. Naturwissenschaften (2000) 87: 137. doi:10.1007/s001140050692

Abstract

 The Ward Hunt Ice Shelf (83°N, 74°W) is the largest remaining section of thick (>10 m) landfast sea ice along the northern coastline of Ellesmere Island, Canada. Extensive meltwater lakes and streams occur on the surface of the ice and are colonized by photosynthetic microbial mat communities. This High Arctic cryo-ecosystem is similar in several of its physical, biological and geochemical features to the McMurdo Ice Shelf in Antarctica. The ice-mats in both polar regions are dominated by filamentous cyanobacteria but also contain diatoms, chlorophytes, flagellates, ciliates, nematodes, tardigrades and rotifers. The luxuriant Ward Hunt consortia also contain high concentrations (107–108 cm–2) of viruses and heterotrophic bacteria. During periods of extensive ice cover, such as glaciations during the Proterozoic, cryotolerant mats of the type now found in these polar ice shelf ecosystems would have provided refugia for the survival, growth and evolution of a variety of organisms, including multicellular eukaryotes.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000