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Under ice habitats for Antarctic krill larvae: could less mean more under climate warming?


Melbourne-Thomas, J and Corney, SP and Trebilco, R and Meiners, KM and Stevens, RP and Kawaguchi, S and Sumner, MD and Constable, AJ, Under ice habitats for Antarctic krill larvae: could less mean more under climate warming?, Geophysical Research Letters, 43, (19) pp. 10,322-10,327. ISSN 0094-8276 (2016) [Refereed Article]


Copyright Statement

2016. American Geophysical Union.

DOI: doi:10.1002/2016GL070846


Overwintering of larvae underneath Antarctic pack ice is a critical stage in the life cycle of Antarctic krill. However, there are no circumpolar assessments of available habitat for larval krill, making it difficult to evaluate how climate change may impact this life stage. We use outputs from a circumpolar sea ice model, together with a set of simple assumptions regarding key habitat features, to identify possible regions of larval krill habitat around Antarctica during winter. We assume that the location and suitability of habitat is determined by both food availability and three-dimensional complexity of the sea ice. A comparison of the combined area of these regions under current conditions with a warm climate scenario indicates that while total areal sea ice extent decreases, there is a consistently larger area of potential larval krill habitat under warm conditions. These findings suggest that decreases in sea ice extent may not necessarily be detrimental for krill populations.

Item Details

Item Type:Refereed Article
Keywords:Antarctic kril, sea ice, habitat model
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
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:Melbourne-Thomas, J (Dr Jessica Melbourne-Thomas)
UTAS Author:Corney, SP (Dr Stuart Corney)
UTAS Author:Trebilco, R (Dr Rowan Trebilco)
UTAS Author:Meiners, KM (Dr Klaus Meiners)
UTAS Author:Stevens, RP (Dr Roger Stevens)
UTAS Author:Kawaguchi, S (Dr So Kawaguchi)
UTAS Author:Sumner, MD (Mr Michael Sumner)
UTAS Author:Constable, AJ (Dr Andrew Constable)
ID Code:112243
Year Published:2016
Web of Science® Times Cited:29
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2016-10-31
Last Modified:2018-03-17
Downloads:129 View Download Statistics

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