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In situ net primary productivity and photosynthesis of Antarctic sea ice algal, phytoplankton and benthic algal communities


McMinn, A and Pankowski, A and Ashworth, CM and Bhagooli, R and Ralph, P and Ryan, K, In situ net primary productivity and photosynthesis of Antarctic sea ice algal, phytoplankton and benthic algal communities, Marine Biology: International Journal on Life in Oceans and Coastal Waters, 157, (6) pp. 1345-1356. ISSN 0025-3162 (2010) [Refereed Article]

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DOI: doi:10.1007/s00227-010-1414-8


Primary production at Antarctic coastal sites is contributed from sea ice algae, phytoplankton and benthic algae. Oxygen microelectrodes were used to estimate sea ice and benthic primary production at several sites around Casey, a coastal area in eastern Antarctica. Maximum oxygen export from sea ice was 0.95 mmol O2 m-2 h-1 (*11.7 mg C m-2 h-1) while from the sediment it was 6.08 mmol O2 m-2 h-1 (*70.8 mg C m-2 h-1). When the ice was present O2 export from the benthos was either low or negative. Sea ice algae assimilation rates were up to 3.77 mg C (mg Chl-a)-1 h-1 while those from the benthos were up to 1.53 mg C (mg Chl-a)-1 h-1. The contribution of the major components of primary productivity was assessed using fluorometric techniques. When the ice was present approximately 55–65% of total daily primary production occurred in the sea ice with the remainder unequally partitioned between the sediment and the water column. When the ice was absent, the benthos contributed nearly 90% of the primary production.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Biological oceanography
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:McMinn, A (Professor Andrew McMinn)
UTAS Author:Pankowski, A (Mr Andrew Pankowski)
UTAS Author:Ashworth, CM (Mr Chris Ashworth)
ID Code:67962
Year Published:2010
Web of Science® Times Cited:45
Deposited By:IMAS Research and Education Centre
Deposited On:2011-03-08
Last Modified:2011-05-10
Downloads:2 View Download Statistics

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