Antarctic echinoids and climate change: a major impact on the brooding forms

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dc.contributor.author Sewell, MA en
dc.contributor.author Hofmann, GE en
dc.date.accessioned 2012-02-23T01:02:52Z en
dc.date.available 2012-02-23T01:02:52Z en
dc.date.issued 2011 en
dc.identifier.citation Global Change Biology 17(2):734-744 Feb 2011 en
dc.identifier.issn 1354-1013 en
dc.identifier.uri http://hdl.handle.net/2292/11743 en
dc.description.abstract Ocean acidification (OA) and the accompanying changes to carbonate concentrations are predicted to have especially negative impacts in the Southern Ocean where, as a result of colder temperatures, there will be shallowing of both the aragonite (ASH) and calcite saturation horizons (CSH). Echinoids are a dominant group of the Antarctic macrofauna which, because of their high-Mg calcite skeleton, are particularly susceptible to changes in the ASH. Using published information on the bathymetric distributions of Antarctic echinoids, we show that the majority of heavily calcified echinoids have their lower bathymetric limit above a depth of ca. 3000 m, approximately the current depth of the CSH. Echinoids whose depth range extends below 3000 m generally have thin, weakly calcified tests and include species from the Order Holasteroida, and the Families Cidaridae and Schizasteridae. Examination of the reproductive mode of Antarctic echinoids shows that brooding, where calcification of the young occurs in the same CaCO3 environment as the mother, is primarily found at a depth above 3000 m. The predicted shallowing of the ASH and CSH under OA conditions is likely to negatively impact growth and reproduction of heavily calcified brooders in the Family Cidaridae, which may result in changes to bathymetric ranges, local population extinction, and associated losses in macrofaunal biodiversity. As with other calcified deep sea invertebrates, echinoids may be particularly vulnerable to the impacts of increased CO2 and OA in the Southern Ocean. en
dc.language EN en
dc.publisher WILEY-BLACKWELL PUBLISHING, INC en
dc.relation.ispartofseries Global Change Biology en
dc.relation.isreplacedby 2292/23156 en
dc.relation.isreplacedby http://hdl.handle.net/2292/23156 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.sherpa.ac.uk/romeo/issn/1354-1013/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.source.uri http://dx.doi.org/10.1111/j.1365-2486.2010.02288.x en
dc.subject Antarctic en
dc.subject brooding en
dc.subject climate change en
dc.subject echinoid en
dc.subject ocean acidification en
dc.subject INCREASED ATMOSPHERIC CO2 en
dc.subject SEA-URCHIN SPINE en
dc.subject OCEAN ACIDIFICATION en
dc.subject DEEP-SEA en
dc.subject SEAWATER CHEMISTRY en
dc.subject BATHYAL ECHINOIDS en
dc.subject MARINE CALCIFIERS en
dc.subject MG/CA RATIO en
dc.subject COLD-WATER en
dc.subject CALCITE en
dc.title Antarctic echinoids and climate change: a major impact on the brooding forms en
dc.type Journal Article en
dc.identifier.doi 10.1111/j.1365-2486.2010.02288.x en
pubs.issue 2 en
pubs.begin-page 734 en
pubs.volume 17 en
dc.rights.holder Copyright: WILEY-BLACKWELL PUBLISHING, INC en
pubs.end-page 744 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.elements-id 204731 en
pubs.org-id Faculty of Science en
pubs.org-id Biological Sciences en


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