Polar Biology

, Volume 27, Issue 11, pp 679–686

Acclimation of Antarctic bottom-ice algal communities to lowered salinities during melting

Original Paper

DOI: 10.1007/s00300-004-0636-y

Cite this article as:
Ryan, K.G., Ralph, P. & McMinn, A. Polar Biol (2004) 27: 679. doi:10.1007/s00300-004-0636-y

Abstract

Sea-ice brine algal communities were exposed to salinities between 30 and 10‰ during melting. There was a progressive decline in maximum quantum yield, relative electron transfer rate (rETRmax) and photosynthetic efficiency (α) with decreasing salinity of the final melted sample. While all species showed a drop in these parameters, Fragilariopsis curta and Entomoneis kjellmannii showed the least inhibition. There was a steady increase in rETRmax and α over 5 days after melting, especially in the samples melted into the highest salinities. In addition, the samples melted from the ice without added filtered seawater showed no photosynthetic activity after 2 days. Our results suggest that for experimental work using sea-ice microalgae, the final salinity of the melted sample should be greater than 28‰ (i.e. the ratio of sea ice to filtered seawater should be at least 1:2).

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.School of Biological SciencesVictoria University of WellingtonWellingtonNew Zealand
  2. 2.Institute for Water and Environmental Resource Management, Department of Environmental SciencesUniversity of TechnologySydneyAustralia
  3. 3.Institute of Antarctic and Southern Ocean StudiesUniversity of TasmaniaHobartAustralia

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