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The zooplankton food web under East Antarctic pack ice – a stable isotope study

Citation

Jia, Z and Swadling, KM and Meiners, KM and Kawaguchi, S and Virtue, P, The zooplankton food web under East Antarctic pack ice - a stable isotope study, Deep-Sea Research. Part 2, 131 pp. 189-202. ISSN 0967-0645 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Elsevier Ltd.

DOI: doi:10.1016/j.dsr2.2015.10.010

Abstract

Understanding how sea ice serves zooplankton species during the food-limited season is crucial information to evaluate the potential responses of pelagic food webs to changes in sea-ice conditions in the Southern Ocean. Stable isotope analyses (13C/12C and 15N/14N) were used to compare the dietary preferences and trophic relationships of major zooplankton species under pack ice during two winter–spring transitions (2007 and 2012). During sampling, furcilia of Euphausia superba demonstrated dietary plasticity between years, herbivory when feeding on sea-ice biota, and with a more heterotrophic diet when feeding from both the sea ice and the water column. Carbon isotope signatures suggested that the pteropod Limacina helicina, small copepods Oithona spp., ostracods and amphipods relied heavily on sea-ice biota. Post larval E. superba and omnivorous krill Thysanoessa macrura consumed both water column and ice biota, but further investigations are needed to estimate the contribution from each source. Large copepods and chaetognaths overwintered on a water column-based diet. Our study suggests that warm and permeable sea ice is more likely to provide food for zooplankton species under the ice than the colder ice.

Item Details

Item Type:Refereed Article
Keywords:krill, zooplankton, sea ice
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:Jia, Z (Miss Molly Jia)
Author:Swadling, KM (Dr Kerrie Swadling)
Author:Meiners, KM (Dr Klaus Meiners)
Author:Kawaguchi, S (Dr So Kawaguchi)
Author:Virtue, P (Associate Professor Patti Virtue)
ID Code:110168
Year Published:2016
Deposited By:Centre for Ecology and Biodiversity
Deposited On:2016-07-18
Last Modified:2016-12-14
Downloads:0

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