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Adult Antarctic krill proves resilient in a simulated high CO2 ocean

Citation

Ericson, JA and Hellessey, N and Kawaguchi, S and Nicol, S and Nichols, PD and Hoem, N and Virtue, P, Adult Antarctic krill proves resilient in a simulated high CO2 ocean, Communications Biology, 1 Article 190. ISSN 2399-3642 (2018) [Refereed Article]


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Copyright Statement

2018 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1038/s42003-018-0195-3

Abstract

Antarctic krill (Euphausia superba) have a keystone role in the Southern Ocean, as the primary prey of Antarctic predators. Decreases in krill abundance could result in a major ecological regime shift, but there is limited information on how climate change may affect krill. Increasing anthropogenic carbon dioxide (CO2) emissions are causing ocean acidification, as absorption of atmospheric CO2 in seawater alters ocean chemistry. Ocean acidification increases mortality and negatively affects physiological functioning in some marine invertebrates, and is predicted to occur most rapidly at high latitudes. Here we show that, in the laboratory, adult krill are able to survive, grow, store fat, mature, and maintain respiration rates when exposed to near-future ocean acidification (10002000 μatm pCO2) for one year. Despite differences in seawater pCO2 incubation conditions, adult krill are able to actively maintain the acid-base balance of their body fluids in near-future pCO2, which enhances their resilience to ocean acidification.

Item Details

Item Type:Refereed Article
Keywords:ocean acidification, CO2, krill
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Ecological Physiology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate and Climate Change not elsewhere classified
UTAS Author:Ericson, JA (Ms Jessica Ericson)
UTAS Author:Hellessey, N (Miss Nicole Hellessey)
UTAS Author:Kawaguchi, S (Dr So Kawaguchi)
UTAS Author:Nicol, S (Dr Stephen Nicol)
UTAS Author:Nichols, PD (Dr Peter Nichols)
UTAS Author:Virtue, P (Associate Professor Patti Virtue)
ID Code:129464
Year Published:2018
Funding Support:Australian Research Council (LP140100412)
Deposited By:Ecology and Biodiversity
Deposited On:2018-11-30
Last Modified:2019-03-05
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