Polar Biology

, Volume 35, Issue 7, pp 1027–1034 | Cite as

Combined effects of two ocean change stressors, warming and acidification, on fertilization and early development of the Antarctic echinoid Sterechinus neumayeri

  • J. A. Ericson
  • M. A. Ho
  • A. Miskelly
  • C. K. King
  • P. Virtue
  • B. Tilbrook
  • M. Byrne
Original Paper


The effects of concurrent ocean warming and acidification on Antarctic marine benthos warrant investigation as little is known about potential synergies between these climate change stressors. We examined the interactive effects of warming and acidification on fertilization and embryonic development of the ecologically important sea urchin Sterechinus neumayeri reared from fertilization in elevated temperature (+1.5°C and 3°C) and decreased pH (−0.3 and −0.5 pH units) treatments. Fertilization using gametes from multiple males and females, to represent populations of spawners, was resilient to acidification at ambient temperature (0°C). At elevated temperatures, there was a negative interactive effect of temperature and pH on percentage of fertilization (11% reduction at 3°C). For cleavage stage embryos, there was a significant, but small reduction (6%) in the percentage of normal embryos at pH 7.5. For blastulae, a 10–11% decrease in normal development occurred in the +3°C treatments across all pH levels. Our results highlight the importance of considering the impacts of both temperature and pH in assessing the life history response of S. neumayeri in a changing polar ocean. While fertilization and development to the blastula stage were robust to levels of temperature and pH change predicted over coming decades, deleterious interactive effects were evident between these stressors at levels projected to occur by 2100 and beyond.


Ocean acidification Ocean warming Antarctica Echinoderm Early life history 



This work was supported by a grant from the Australian Antarctic Division (AAD). Thanks to AAD staff and students who provided assistance and logistical support including Rob King, Steve Whiteside, John van den Hoff, Andrew Bryant, Clive Strauss, Charmaine Alford, Kathryn Brown, Lara Marcus, Sarah Payne, Bianca Sfiligoj, Claire Wallis, Debbie Lang, Jane Wasley, Dougie Gray, and Leigh Hornsby.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • J. A. Ericson
    • 1
    • 2
  • M. A. Ho
    • 1
  • A. Miskelly
    • 1
  • C. K. King
    • 3
  • P. Virtue
    • 4
  • B. Tilbrook
    • 5
    • 6
  • M. Byrne
    • 1
    • 7
  1. 1.School of Medical SciencesUniversity of SydneySydneyAustralia
  2. 2.University of OtagoDunedinNew Zealand
  3. 3.Australian Antarctic DivisionKingstonAustralia
  4. 4.Institute for Marine and Antarctic StudiesUniversity of TasmaniaHobartAustralia
  5. 5.Centre for Australian Weather and Climate Research, a partnership between CSIRO and the Bureau of MeteorologyHobartAustralia
  6. 6.Antarctic Climate and Ecosystems Cooperative Research CentreHobartAustralia
  7. 7.School of Biological SciencesUniversity of SydneySydneyAustralia

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