eCite Digital Repository

The use of oxygen microelectrodes to determine the net production by an Antarctic sea ice algal community

Citation

McMinn, A and Ashworth, CM, The use of oxygen microelectrodes to determine the net production by an Antarctic sea ice algal community, Antarctic Science, 10, (1) pp. 39-44. ISSN 0954-1020 (1998) [Refereed Article]

Abstract

Oxygen microelectrodes were used to measure the photosynthetic rates of Antarctic fast ice algal mats. Using the oxygen flux across the diffusive boundary layer below the fast ice at Davis, a productivity range of 0-1.78 mg C m-2 h-1 was measured. This is at the lower end of fast ice productivity estimates and suggests that conventional 14C techniques may overestimate sea ice algal mat productivity. Photosynthetic capacity (Pa(max)) approached 0.05 mg C. (mg chl a)-1 h-1. Onset of photosynthesis saturation, E(k), was found at c. 14 μmol photons m-2 s-1. The irradiance of photoinhibition onset, E(inh), was c: 20 μmol photons m-2 and the irradiance at the compensation point, E(c), was 4 μmol photons m-2 s-1.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Antarctic and Sub-Antarctic Land and Water Management
Author:McMinn, A (Professor Andrew McMinn)
Author:Ashworth, CM (Mr Chris Ashworth)
ID Code:14672
Year Published:1998
Web of Science® Times Cited:19
Deposited By:IASOS
Deposited On:1998-08-01
Last Modified:2011-08-09
Downloads:0

Repository Staff Only: item control page