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Will krill fare well under Southern Ocean acidification?

journal contribution
posted on 2023-05-17, 05:22 authored by So KawaguchiSo Kawaguchi, Kurihara, H, King, R, Hale, L, Berli, TM, James Robinson, Ishida, A, Wakita, M, Patti VirtuePatti Virtue, Stephen Nicol, Ishimatsu, A
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.

History

Publication title

Biology Letters

Volume

7

Pagination

288-291

ISSN

1744-9561

Department/School

Institute for Marine and Antarctic Studies

Publisher

The Royal Society

Place of publication

London

Rights statement

Copyright © 2010 The Royal Society

Repository Status

  • Restricted

Socio-economic Objectives

Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)

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