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

Citation

Ericson, JA and Ho, MA and Miskelly, A and King, CK and Virtue, P and Tilbrook, BD and Byrne, M, Combined effects of two ocean change stressors, warming and acidification, on fertilization and early development of the Antarctic echinoid Sterechinus neumayeri, Polar Biology, 35, (7) pp. 1027-1034 . ISSN 1432-2056 (2011) [Refereed Article]


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Copyright 2011 Springer-Verlag

DOI: doi:10.1007/s00300-011-1150-7

Abstract

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 (+1.5C and 3C) 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 (0C). At elevated temperatures, there was a negative interactive effect of temperature and pH on percentage of fertilization (11% reduction at 3C). 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 1011% decrease in normal development occurred in the +3C 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.

Item Details

Item Type:Refereed Article
Keywords:Ocean acidification Ocean warming Antarctica Echinoderm Early life history
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
Author:Virtue, P (Associate Professor Patti Virtue)
Author:Tilbrook, BD (Dr Bronte Tilbrook)
ID Code:76853
Year Published:2011
Web of Science® Times Cited:30
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-03-14
Last Modified:2017-10-06
Downloads:4 View Download Statistics

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