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Antarctic pack ice algal distribution: floe-scale spatial variability and predictability from physical parameters

Citation

Meiners, KM and Arndt, S and Bestley, S and Krumpen, T and Ricker, R and Milnes, M and Newbery, K and Freier, U and Jarman, S and King, R and Proud, R and Kawaguchi, S and Meyer, B, Antarctic pack ice algal distribution: floe-scale spatial variability and predictability from physical parameters, Geophysical Research Letters, 44, (14) pp. 7382-7380. ISSN 0094-8276 (2017) [Refereed Article]


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Copyright Statement

Copyright 2017 Commonwealth of Australia

DOI: doi:10.1002/2017GL074346

Abstract

Antarctic pack ice serves as habitat for microalgae which contribute to Southern Ocean primary production and serve as important food source for pelagic herbivores. Ice algal biomass is highly patchy and remains severely undersampled by classical methods such as spatially restricted ice coring surveys. Here we provide an unprecedented view of ice algal biomass distribution, mapped (as chlorophyll a) in a 100 m by 100 m area of a Weddell Sea pack ice floe, using under-ice irradiance measurements taken with an instrumented remotely operated vehicle. We identified significant correlations (p < 0.001) between algal biomass and concomitant in situ surface measurements of snow depth, ice thickness, and estimated sea ice freeboard levels using a statistical model. The model's explanatory power (r2 = 0.30) indicates that these parameters alone may provide a first basis for spatial prediction of ice algal biomass, but parameterization of additional determinants is needed to inform more robust upscaling efforts.

Item Details

Item Type:Refereed Article
Keywords:Antarctic, sea ice, algae, spatial upscaling
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:Meiners, KM (Dr Klaus Meiners)
Author:Bestley, S (Dr Sophie Bestley)
Author:Kawaguchi, S (Dr So Kawaguchi)
ID Code:120052
Year Published:2017
Deposited By:Centre for Ecology and Biodiversity
Deposited On:2017-08-09
Last Modified:2017-09-06
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