Ocean acidification and fertilization in the Antarctic sea urchin Sterechinus neumayeri: the importance of polyspermy

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dc.contributor.author Sewell, Mary en
dc.contributor.author Millar, Russell en
dc.contributor.author Yu, PC en
dc.contributor.author Kapsenberg, L en
dc.contributor.author Hofmann, GE en
dc.date.accessioned 2014-10-27T20:41:46Z en
dc.date.issued 2014 en
dc.identifier.citation Environmental Science and Technology, 2014, 48 (1), pp. 713 - 722 en
dc.identifier.issn 0013-936X en
dc.identifier.uri http://hdl.handle.net/2292/23338 en
dc.description.abstract Ocean acidification (OA), the reduction of the seawater pH as a result of increasing levels of atmospheric CO2, is an important climate change stressor in the Southern Ocean and Antarctic. We examined the impact of OA on fertilization success in the Antarctic sea urchin Sterechinus neumayeri using pH treatment conditions reflective of the current and near-future “pH seascape” for this species: current (control: pH 8.052, 384.1 μatm of pCO2), a high CO2 treatment approximating the 0.2–0.3 unit decrease in pH predicted for 2100 (high CO2: pH 7.830, 666.0 μatm of pCO2), and an intermediate medium CO2 (pH 7.967, 473.4 μatm of pCO2). Using a fertilization kinetics approach and mixed-effect models, we observed significant variation in the OA response between individual male/female pairs (N = 7) and a significant population-level increase (70–100%) in tb (time for a complete block to polyspermy) at medium and high CO2, a mechanism that potentially explains the higher levels of abnormal development seen in OA conditions. However, two pairs showed higher fertilization success with CO2 treatment and a nonsignificant effect. Future studies should focus on the mechanisms and levels of interindividual variability in OA response, so that we can consider the potential for selection and adaptation of organisms to a future ocean. en
dc.publisher American Chemical Society en
dc.relation.ispartofseries Environmental Science and Technology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://pubs.acs.org/page/copyright/index.html http://www.sherpa.ac.uk/romeo/issn/0013-936X/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Ocean acidification and fertilization in the Antarctic sea urchin Sterechinus neumayeri: the importance of polyspermy en
dc.type Journal Article en
dc.identifier.doi 10.1021/es402815s en
pubs.issue 1 en
pubs.begin-page 713 en
pubs.volume 48 en
dc.rights.holder Copyright: American Chemical Society en
dc.identifier.pmid 24299658 en
pubs.end-page 722 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 415608 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
pubs.org-id Statistics en
dc.identifier.eissn 1520-5851 en
pubs.record-created-at-source-date 2013-12-05 en
pubs.dimensions-id 24299658 en

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