Temperature and salinity: two climate change stressors affecting early development of the New Zealand sea urchin Evechinus chloroticus

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dc.contributor.author Delorme Juri, Natali en
dc.contributor.author Sewell, Mary en
dc.date.accessioned 2014-10-23T02:20:32Z en
dc.date.issued 2014-09 en
dc.identifier.citation Marine Biology, 2014, 161 (9), pp. 1999 - 2009 en
dc.identifier.issn 0025-3162 en
dc.identifier.uri http://hdl.handle.net/2292/23318 en
dc.description.abstract Temperature and salinity are important environmental factors affecting the normal functioning of marine animals, particularly animals such as sea urchins living in shallow waters and tide pools. Here, we evaluated the effect of different combinations of temperature and salinity on early embryos of the endemic New Zealand sea urchin Evechinus chloroticus. Animals were collected at Matheson’s Bay (36º18′17′′S; 174º47′51′′E) in north-eastern New Zealand in February 2013. Embryos were exposed to five salinities (29, 31, 34, 35 and 37 ppt) and two temperatures (18 and 21 °C) during the first 24 h of development. Low salinity (29 ppt) affected all parameters (fertilization, development rate, gastrulation and normal development), with ca. 50 % of embryos surviving at 29 ppt, whereas seawater temperature only affected development rate and gastrulation. An increase in temperature from 18 to 21 °C minimized the negative effect of low salinity (≤31 ppt) on development rate and gastrulation of E. chloroticus. Overall, the results of this study suggest that early embryos of E. chloroticus have developmental plasticity to withstand reductions in salinity up to 29 ppt; however, it is still unknown whether the surviving embryos will be able to complete larval development at low salinities, particularly whether the embryos and larvae are carried into extreme environments such as estuaries where salinity is even lower. Multistressor studies are very important for climate change research as multiple environmental factors will act together in the wild, having major consequences for development and recruitment of marine invertebrates. en
dc.publisher Springer en
dc.relation.ispartofseries Marine Biology 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://www.springer.com/gp/open-access/authors-rights/self-archiving-policy/2124 http://www.sherpa.ac.uk/romeo/issn/0025-3162/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Temperature and salinity: two climate change stressors affecting early development of the New Zealand sea urchin Evechinus chloroticus en
dc.type Journal Article en
dc.identifier.doi 10.1007/s00227-014-2480-0 en
pubs.issue 9 en
pubs.begin-page 1999 en
pubs.volume 161 en
dc.rights.holder Copyright: Springer en
pubs.end-page 2009 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 446115 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
dc.identifier.eissn 1432-1793 en
pubs.record-created-at-source-date 2014-10-23 en

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