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Antarctic coastal microalgal primary production and photosynthesis

Citation

McMinn, A and Ashworth, C and Bhagooli, R and Martin, A and Salleh, S and Ralph, P and Ryan, K, Antarctic coastal microalgal primary production and photosynthesis, Marine Biology, 159, (12) pp. 2827-2837. ISSN 0025-3162 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 Springer-Verlag

DOI: doi:10.1007/s00227-012-2044-0

Abstract

Primary production in coastal Antarctica is primarily contributed from three sources: sea ice algae, phytoplankton, and microphytobenthos. Compared to other eastern Antarctic sites, the sea ice microalgal biomass at Casey Station, in spring 2005 was relatively low, 3.841.67 to 21.613.3mg chl-a m−2 but productive, 103163mgCm−2day−1. The photosynthetic parameters, Fv/Fm and rETRmax, imply a community well-acclimated to the light climate of the benthic, water column, and sea ice habitats. Phytoplankton biomass was greatest in late spring (11.10.920μg chl-a l−1), which probably reflects input from the overlying sea ice. Lower biomass and depressed Fv/Fm values later in the season were probably due to nutrient limitation. Benthic microalgal biomass was consistently between 200 and 400mg chl-a m−2 and production increased through into late summer (204mgCm−2day−1). After the sea ice broke out, the marine environment supported a small phytoplankton biomass and a large benthic microalgal biomass. Compared with previous studies, Fv/Fm values were relatively low but there was no evidence of photoinhibition. When sea ice was present, primary production of benthic microalgae was either very low or there was a net draw down of oxygen. The benthic microalgal community made a larger contribution to total primary production than the phytoplankton or sea ice algae at water depth less than approximately 5m.

Item Details

Item Type:Refereed Article
Keywords:Antarctic, primary production, sea ice, benthic, photosynthesis
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:McMinn, A (Professor Andrew McMinn)
Author:Ashworth, C (Mr Chris Ashworth)
Author:Bhagooli, R (Dr Ranjeet Bhagooli)
Author:Martin, A (Dr Andrew Martin)
Author:Salleh, S (Ms Sazlina Salleh)
ID Code:81441
Year Published:2012
Funding Support:Australian Research Council (DP0773558)
Web of Science® Times Cited:3
Deposited By:IMAS Research and Education Centre
Deposited On:2012-12-06
Last Modified:2015-08-13
Downloads:0

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