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Acclimation of Antarctic bottom-ice algal communities to lowered salinities during melting
journal contribution
posted on 2023-05-16, 15:59 authored by Ryan, KG, Ralph, P, Andrew McMinnAndrew McMinnSea-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.
History
Publication title
Polar BiologyVolume
27Issue
11Pagination
679-686ISSN
0722-4060Department/School
Institute for Marine and Antarctic StudiesPublisher
Springer-VerlagPlace of publication
New York, USARepository Status
- Restricted