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Growth and Productivity of Antarctic Sea Ice Algae under PAR and UV Irradiances

Citation

McMinn, A and Ashworth, CM and Ryan, K, Growth and Productivity of Antarctic Sea Ice Algae under PAR and UV Irradiances, Botanica Marina, 42, (4) pp. 401-407. ISSN 0006-8055 (1999) [Refereed Article]

DOI: doi:10.1515/BOT.1999.046

Abstract

A light perturbation experiment on sea ice at Cape Evans in 1996 found significant differences in biomass accumulation between ice algal assemblages exposed to additional UVB, UVA and PAR irradiances and those exposed to either control or elevated PAR and UVA without UVB. Sea ice with its snow cover removed (and thus exposed to additional UVB, UVA and PAR) had a 40% lower rate of biomass accumulation than sea ice with its snow cover removed but covered with UVB-absorbing mylar. Chlorophyll-specific production under PAR was up to 0.05 mg C (mg Chl a)-1 h-1 although it was approximately 0.02 mg C (mg Chl a)-1 h-1 at ambient under ice irradiances of 2-6 μmol photons m-2 s-1 PAR. UVB irradiation was found to have a greater impact on highly shade-adapted sea ice algal communities beneath thick ice with a thick snow cover than on thinner ice with less snow.

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:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:McMinn, A (Professor Andrew McMinn)
Author:Ashworth, CM (Mr Chris Ashworth)
ID Code:16765
Year Published:1999
Web of Science® Times Cited:36
Deposited By:IASOS
Deposited On:1999-08-01
Last Modified:2011-08-05
Downloads:0

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