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


Ryan, KG and Ralph, P and McMinn, A, Acclimation of Antarctic bottom-ice algal communities to lowered salinities during melting, Polar Biology, 27, (11) pp. 679-686. ISSN 0722-4060 (2004) [Refereed Article]

DOI: doi:10.1007/s00300-004-0636-y


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 alpha; 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). © Springer-Verlag 2004.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Phycology (incl. marine grasses)
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Natural hazards
Objective Field:Natural hazards not elsewhere classified
UTAS Author:McMinn, A (Professor Andrew McMinn)
ID Code:32173
Year Published:2004
Web of Science® Times Cited:40
Deposited By:IASOS
Deposited On:2004-08-01
Last Modified:2005-06-06

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