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Quantum yield and photosynthetic parameters of marine microalgae from the southern Arctic Ocean, Svalbard

Published online by Cambridge University Press:  12 October 2004

A. McMinn  and
E.N. Hegseth
A. McMinn
Affiliation:
Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Private Bag 77, Hobart 7001, Tasmania, Australia
E.N. Hegseth
Affiliation:
Norwegian College of Fishery Science, University of Tromsø, N-9037 Tromsø, Norway
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Abstract

The quantum yield and photosynthetic parameters of phytoplankton and sea ice microalgal communities were assessed from the Arctic Ocean and fjords of northern Svalbard. The phytoplankton community in Fram Strait was dominated by Phaeocystis while on Norskebanken it was dominated by diatoms. The quantum yield showed maximum values of 0·64 at 20–40 m below the surface and were consistent with nutrient replete waters elsewhere.

Sea ice infiltration communities were widespread and dominated by Phaeocystis. This is the first record of an Arctic infiltration ice community. Quantum yields were relatively low (0·247). Bottom ice communities, which were dominated by Nitzschia frigida, were extremely restricted and had moderate quantum yields (0·427). Communities growing on multiyear ice had quantum yields of only 0·126. All ice communities were well adapted to their light environment.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 84 , Issue 5 , October 2004 , pp. 865 - 871
Copyright
2004 Marine Biological Association of the United Kingdom

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