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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

TitleCO 2-driven ocean acidification alters and weakens integrity of the calcareous tubes produced by the serpulid Tubeworm, Hydroides elegans
Authors
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
Citation
Plos One, 2012, v. 7 n. 8, article no. e42718 How to Cite?
Abstract
As 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.
Persistent Identifierhttp://hdl.handle.net/10722/159425
ISSN
2013 Impact Factor: 3.534
2013 SCImago Journal Rankings: 1.724
ISI Accession Number ID
References

 

Author Affiliations
  1. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorChan, VBSen_HK
dc.contributor.authorLi, Cen_HK
dc.contributor.authorLane, ACen_HK
dc.contributor.authorWang, Yen_HK
dc.contributor.authorLu, Xen_HK
dc.contributor.authorShih, Ken_HK
dc.contributor.authorZhang, Ten_HK
dc.contributor.authorThiyagarajan, Ven_HK
dc.date.accessioned2012-08-16T05:49:50Z-
dc.date.available2012-08-16T05:49:50Z-
dc.date.issued2012en_HK
dc.identifier.citationPlos One, 2012, v. 7 n. 8, article no. e42718en_HK
dc.identifier.issn1932-6203en_HK
dc.identifier.urihttp://hdl.handle.net/10722/159425-
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.en_HK
dc.languageengen_US
dc.publisherPublic Library of Science. The Journal's web site is located at http://www.plosone.org/home.actionen_HK
dc.relation.ispartofPLoS ONEen_HK
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 elegansen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1932-6203&volume=&spage=&epage=&date=2012&atitle=CO2-driven+ocean+acidification+alters+and+weakens+integrity+of+calcareous+tube+produced+by+the+serpulid+tubeworm,+Hydroides+elegansen_US
dc.identifier.emailShih, K: kshih@hkucc.hku.hken_HK
dc.identifier.emailZhang, T: zhangt@hkucc.hku.hken_HK
dc.identifier.emailThiyagarajan, V: rajan@hkucc.hku.hken_HK
dc.identifier.authorityShih, K=rp00167en_HK
dc.identifier.authorityZhang, T=rp00211en_HK
dc.identifier.authorityThiyagarajan, V=rp00796en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1371/journal.pone.0042718en_HK
dc.identifier.pmid22912726-
dc.identifier.scopuseid_2-s2.0-84865061709en_HK
dc.identifier.hkuros203031en_US
dc.identifier.hkuros222344-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84865061709&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume7en_HK
dc.identifier.issue8en_HK
dc.identifier.eissn1932-6203-
dc.identifier.isiWOS:000307500100024-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChan, VBS=55337445300en_HK
dc.identifier.scopusauthoridLi, C=54948417700en_HK
dc.identifier.scopusauthoridLane, AC=50262349900en_HK
dc.identifier.scopusauthoridWang, Y=54685419000en_HK
dc.identifier.scopusauthoridLu, X=34168040600en_HK
dc.identifier.scopusauthoridShih, K=14072108900en_HK
dc.identifier.scopusauthoridZhang, T=24470677400en_HK
dc.identifier.scopusauthoridThiyagarajan, V=6602476830en_HK

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