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Antarctic krill embryos and larvae were experimentally exposed to 380 (control), 1000 and 2000 matm pCO2 in order to assess the possible impact of ocean acidification on early development of krill. No significant effects were detected on embryonic development or larval behaviour at 1000 matm pCO2; however, at 2000 matm pCO2 development was disrupted before gastrulation in 90 per cent of embryos, and no larvae hatched successfully. Our model projections demonstrated that Southern Ocean sea water pCO2 could rise up to 1400 matm in krill’s depth range under the IPCC IS92a scenario by the year 2100 (atmospheric pCO2 788 matm). These results point out the urgent need for understanding the pCO2-response relationship for krill developmental and later stages, in order to predict the possible fate of this key species in the Southern Ocean.

Item Type:	Refereed Article
Keywords:	Antarctic krill; ocean acidification; early development; habitat pCO2; Southern Ocean
Research Division:	Biological Sciences
Research Group:	Other biological sciences
Research Field:	Global change biology
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:	Kawaguchi, S (Dr So Kawaguchi)
UTAS Author:	Hale, L (Miss Hale)
UTAS Author:	Berli, TM (Mr Thomas Berli)
UTAS Author:	Robinson, JP (Dr James Robinson)
UTAS Author:	Virtue, P (Associate Professor Patti Virtue)
UTAS Author:	Nicol, S (Dr Stephen Nicol)
ID Code:	68395
Year Published:	2011
Web of Science® Times Cited:	74
Deposited By:	IMAS Research and Education Centre
Deposited On:	2011-03-11
Last Modified:	2017-04-11
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