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Article: Calcium carbonate unit realignment under acidification: A potential compensatory mechanism in an edible estuarine oyster

TitleCalcium carbonate unit realignment under acidification: A potential compensatory mechanism in an edible estuarine oyster
Authors
KeywordsOcean acidification
Oyster shells
Crystallography
Mechanical property
Calcification
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/marpolbul
Citation
Marine Pollution Bulletin, 2019, v. 139, p. 141-149 How to Cite?
AbstractOcean acidification (OA) is well-known for impairing marine calcification; however, the end response of several essential species to this perturbation remains unknown. Decreased pH and saturation levels (Ω) of minerals under OA is projected to alter shell crystallography and thus to reduce shell mechanical properties. This study examined this hypothesis using a commercially important estuarine oyster Magallana hongkongensis. Although shell damage occurred on the outmost prismatic layer and the undying myostracum at decreased pH 7.6 and 7.3, the major foliated layer was relatively unharmed. Oysters maintained their shell hardness and stiffness through altered crystal unit orientation under pH 7.6 conditions. However, under the undersaturated conditions (ΩCal ~ 0.8) at pH 7.3, the realigned crystal units in foliated layer ultimately resulted in less stiff shells which indicated although estuarine oysters are mechanically resistant to unfavorable calcification conditions, extremely low pH condition is still a threat to this essential species.
Persistent Identifierhttp://hdl.handle.net/10722/277993
ISSN
2017 Impact Factor: 3.241
2015 SCImago Journal Rankings: 1.264

 

DC FieldValueLanguage
dc.contributor.authorMeng, Y-
dc.contributor.authorGUO, Z-
dc.contributor.authorYAO, H-
dc.contributor.authorYeung, KWK-
dc.contributor.authorVengatesen, T-
dc.date.accessioned2019-10-04T08:05:21Z-
dc.date.available2019-10-04T08:05:21Z-
dc.date.issued2019-
dc.identifier.citationMarine Pollution Bulletin, 2019, v. 139, p. 141-149-
dc.identifier.issn0025-326X-
dc.identifier.urihttp://hdl.handle.net/10722/277993-
dc.description.abstractOcean acidification (OA) is well-known for impairing marine calcification; however, the end response of several essential species to this perturbation remains unknown. Decreased pH and saturation levels (Ω) of minerals under OA is projected to alter shell crystallography and thus to reduce shell mechanical properties. This study examined this hypothesis using a commercially important estuarine oyster Magallana hongkongensis. Although shell damage occurred on the outmost prismatic layer and the undying myostracum at decreased pH 7.6 and 7.3, the major foliated layer was relatively unharmed. Oysters maintained their shell hardness and stiffness through altered crystal unit orientation under pH 7.6 conditions. However, under the undersaturated conditions (ΩCal ~ 0.8) at pH 7.3, the realigned crystal units in foliated layer ultimately resulted in less stiff shells which indicated although estuarine oysters are mechanically resistant to unfavorable calcification conditions, extremely low pH condition is still a threat to this essential species.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/marpolbul-
dc.relation.ispartofMarine Pollution Bulletin-
dc.subjectOcean acidification-
dc.subjectOyster shells-
dc.subjectCrystallography-
dc.subjectMechanical property-
dc.subjectCalcification-
dc.titleCalcium carbonate unit realignment under acidification: A potential compensatory mechanism in an edible estuarine oyster-
dc.typeArticle-
dc.identifier.emailMeng, Y: yuanm@hku.hk-
dc.identifier.emailYeung, KWK: wkkyeung@hku.hk-
dc.identifier.emailVengatesen, T: rajan@hkucc.hku.hk-
dc.identifier.authorityYeung, KWK=rp00309-
dc.identifier.authorityVengatesen, T=rp00796-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.marpolbul.2018.12.030-
dc.identifier.pmid30686412-
dc.identifier.scopuseid_2-s2.0-85058796931-
dc.identifier.hkuros306879-
dc.identifier.volume139-
dc.identifier.spage141-
dc.identifier.epage149-
dc.publisher.placeUnited Kingdom-

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