Will krill fare well under Southern Ocean acidification?

Antarctic krill embryos and larvae were experimentally exposed to 380 (control), 1000 and 2000 µatm p CO 2 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 µatm p CO...

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Bibliographic Details
Published in:Biology Letters
Main Authors: Kawaguchi, So, Kurihara, Haruko, King, Robert, Hale, Lillian, Berli, Thomas, Robinson, James P., Ishida, Akio, Wakita, Masahide, Virtue, Patti, Nicol, Stephen, Ishimatsu, Atsushi
Format: Article in Journal/Newspaper
Language:English
Published: The Royal Society 2010
Subjects:
Antarctic
Southern Ocean
Antarc*
Antarctic Krill
Ocean acidification
Online Access:http://dx.doi.org/10.1098/rsbl.2010.0777
https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2010.0777
https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2010.0777
Description
Summary:Antarctic krill embryos and larvae were experimentally exposed to 380 (control), 1000 and 2000 µatm p CO 2 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 µatm p CO 2 however, at 2000 µatm p CO 2 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 p CO 2 could rise up to 1400 µatm in krill's depth range under the IPCC IS92a scenario by the year 2100 (atmospheric p CO 2 788 µatm). These results point out the urgent need for understanding the p CO 2 -response relationship for krill developmental and later stages, in order to predict the possible fate of this key species in the Southern Ocean.

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