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Article: CO 2-driven ocean acidification alters and weakens integrity of the calcareous tubes produced by the serpulid Tubeworm, Hydroides elegans
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TitleCO 2-driven ocean acidification alters and weakens integrity of the calcareous tubes produced by the serpulid Tubeworm, Hydroides elegans
 
AuthorsChan, VBS1
Li, C1
Lane, AC1
Wang, Y1
Lu, X1
Shih, K1
Zhang, T1
Thiyagarajan, V1
 
KeywordsChemistry
Marine and Aquatic Sciences
 
Issue Date2012
 
PublisherPublic Library of Science. The Journal's web site is located at http://www.plosone.org/home.action
 
CitationPlos One, 2012, v. 7 n. 8, article no. e42718 [How to Cite?]
DOI: http://dx.doi.org/10.1371/journal.pone.0042718
 
AbstractAs a consequence of anthropogenic CO 2-driven ocean acidification (OA), coastal waters are becoming increasingly challenging for calcifiers due to reductions in saturation states of calcium carbonate (CaCO 3) minerals. The response of calcification rate is one of the most frequently investigated symptoms of OA. However, OA may also result in poor quality calcareous products through impaired calcification processes despite there being no observed change in calcification rate. The mineralogy and ultrastructure of the calcareous products under OA conditions may be altered, resulting in changes to the mechanical properties of calcified structures. Here, the warm water biofouling tubeworm, Hydroides elegans, was reared from larva to early juvenile stage at the aragonite saturation state (Ω A) for the current pCO 2 level (ambient) and those predicted for the years 2050, 2100 and 2300. Composition, ultrastructure and mechanical strength of the calcareous tubes produced by those early juvenile tubeworms were examined using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and nanoindentation. Juvenile tubes were composed primarily of the highly soluble CaCO 3 mineral form, aragonite. Tubes produced in seawater with aragonite saturation states near or below one had significantly higher proportions of the crystalline precursor, amorphous calcium carbonate (ACC) and the calcite/aragonite ratio dramatically increased. These alterations in tube mineralogy resulted in a holistic deterioration of the tube hardness and elasticity. Thus, in conditions where Ω A is near or below one, the aragonite-producing juvenile tubeworms may no longer be able to maintain the integrity of their calcification products, and may result in reduced survivorship due to the weakened tube protection. © 2012 Chan et al.
 
ISSN1932-6203
2012 Impact Factor: 3.73
2012 SCImago Journal Rankings: 1.512
 
DOIhttp://dx.doi.org/10.1371/journal.pone.0042718
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorChan, VBS
 
dc.contributor.authorLi, C
 
dc.contributor.authorLane, AC
 
dc.contributor.authorWang, Y
 
dc.contributor.authorLu, X
 
dc.contributor.authorShih, K
 
dc.contributor.authorZhang, T
 
dc.contributor.authorThiyagarajan, V
 
dc.date.accessioned2012-08-16T05:49:50Z
 
dc.date.available2012-08-16T05:49:50Z
 
dc.date.issued2012
 
dc.description.abstractAs a consequence of anthropogenic CO 2-driven ocean acidification (OA), coastal waters are becoming increasingly challenging for calcifiers due to reductions in saturation states of calcium carbonate (CaCO 3) minerals. The response of calcification rate is one of the most frequently investigated symptoms of OA. However, OA may also result in poor quality calcareous products through impaired calcification processes despite there being no observed change in calcification rate. The mineralogy and ultrastructure of the calcareous products under OA conditions may be altered, resulting in changes to the mechanical properties of calcified structures. Here, the warm water biofouling tubeworm, Hydroides elegans, was reared from larva to early juvenile stage at the aragonite saturation state (Ω A) for the current pCO 2 level (ambient) and those predicted for the years 2050, 2100 and 2300. Composition, ultrastructure and mechanical strength of the calcareous tubes produced by those early juvenile tubeworms were examined using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and nanoindentation. Juvenile tubes were composed primarily of the highly soluble CaCO 3 mineral form, aragonite. Tubes produced in seawater with aragonite saturation states near or below one had significantly higher proportions of the crystalline precursor, amorphous calcium carbonate (ACC) and the calcite/aragonite ratio dramatically increased. These alterations in tube mineralogy resulted in a holistic deterioration of the tube hardness and elasticity. Thus, in conditions where Ω A is near or below one, the aragonite-producing juvenile tubeworms may no longer be able to maintain the integrity of their calcification products, and may result in reduced survivorship due to the weakened tube protection. © 2012 Chan et al.
 
dc.description.naturepublished_or_final_version
 
dc.identifier.citationPlos One, 2012, v. 7 n. 8, article no. e42718 [How to Cite?]
DOI: http://dx.doi.org/10.1371/journal.pone.0042718
 
dc.identifier.doihttp://dx.doi.org/10.1371/journal.pone.0042718
 
dc.identifier.eissn1932-6203
 
dc.identifier.hkuros203031
 
dc.identifier.hkuros222344
 
dc.identifier.issn1932-6203
2012 Impact Factor: 3.73
2012 SCImago Journal Rankings: 1.512
 
dc.identifier.issue8
 
dc.identifier.openurl
 
dc.identifier.pmid22912726
 
dc.identifier.scopuseid_2-s2.0-84865061709
 
dc.identifier.urihttp://hdl.handle.net/10722/159425
 
dc.identifier.volume7
 
dc.languageeng
 
dc.publisherPublic Library of Science. The Journal's web site is located at http://www.plosone.org/home.action
 
dc.publisher.placeUnited States
 
dc.relation.ispartofPLoS ONE
 
dc.relation.referencesReferences in Scopus
 
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
 
dc.subjectChemistry
 
dc.subjectMarine and Aquatic Sciences
 
dc.titleCO 2-driven ocean acidification alters and weakens integrity of the calcareous tubes produced by the serpulid Tubeworm, Hydroides elegans
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong