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dc.contributor.authorAllison, Nicola
dc.contributor.authorCole, Catherine
dc.contributor.authorHintz, Chris
dc.contributor.authorHintz, Ken
dc.contributor.authorRae, James
dc.contributor.authorFinch, Adrian
dc.date.accessioned2019-09-04T23:39:48Z
dc.date.available2019-09-04T23:39:48Z
dc.date.issued2018-10-10
dc.identifier.citationAllison , N , Cole , C , Hintz , C , Hintz , K , Rae , J & Finch , A 2018 , ' The effect of ocean acidification on tropical coral calcification : insights from calcification fluid DIC chemistry ' , Chemical Geology , vol. 497 , pp. 162-169 . https://doi.org/10.1016/j.chemgeo.2018.09.004en
dc.identifier.issn0009-2541
dc.identifier.otherPURE: 255702546
dc.identifier.otherPURE UUID: c92cb7cd-c2b4-4fb3-8a6f-5e1099532479
dc.identifier.otherScopus: 85053185811
dc.identifier.otherORCID: /0000-0002-3689-1517/work/48131618
dc.identifier.otherORCID: /0000-0003-3720-1917/work/48131983
dc.identifier.otherORCID: /0000-0003-3904-2526/work/60196312
dc.identifier.otherWOS: 000445186400013
dc.identifier.urihttps://hdl.handle.net/10023/18421
dc.descriptionThis work was supported by the UK Natural Environment Research Council (award NE/I022973/1) to AAF and NA.en
dc.description.abstractOcean acidification typically reduces calcification in tropical marine corals but the mechanism for this process is not understood. We use skeletal boron geochemistry (B/Ca and δ11B) to reconstruct the calcification fluid DIC of corals cultured over both high and low seawater pCO2 (180, 400 and 750 μatm). We observe strong positive correlations between calcification fluid pH and concentrations of the DIC species potentially implicated in aragonite precipitation (be they CO32- , HCO3- or HCO3-+CO32- ). Similarly, with the exception of one outlier, the fluid concentrations of precipitating DIC species are strongly positively correlated with coral calcification rate. Corals cultured at high seawater pCO2 usually have low calcification fluid pH and low concentrations of precipitating DIC, suggesting that a reduction in DIC substrate at the calcification site is responsible for decreased calcification. The outlier coral maintained high pHCF and DICCF at high seawater pCO2 but exhibited a reduced calcification rate indicating that the coral has a limited energy budget to support proton extrusion from the calcification fluid and meet other calcification demands. We find no evidence that increasing seawater pCO2 enhances diffusion of CO2 into the calcification site. Instead the overlying [CO2] available to diffuse into the calcification site appears broadly comparable between seawater pCO2 treatments, implying that metabolic activity (respiration and photosynthesis) generates a similar [CO2] in the vicinity of the calcification site regardless of seawater pCO2.
dc.format.extent8
dc.language.isoeng
dc.relation.ispartofChemical Geologyen
dc.rights© 2018 Elsevier B. V. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1016/j.chemgeo.2018.09.004en
dc.subjectB/Caen
dc.subjectDissolved inorganic carbonen
dc.subjectCoralen
dc.subjectCalcificationen
dc.subjectCalcification fluiden
dc.subjectδ11Ben
dc.subjectQE Geologyen
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subjectSDG 14 - Life Below Wateren
dc.subject.lccQEen
dc.subject.lccQDen
dc.titleThe effect of ocean acidification on tropical coral calcification : insights from calcification fluid DIC chemistryen
dc.typeJournal articleen
dc.contributor.sponsorNERCen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. St Andrews Isotope Geochemistryen
dc.identifier.doihttps://doi.org/10.1016/j.chemgeo.2018.09.004
dc.description.statusPeer revieweden
dc.date.embargoedUntil2019-09-05
dc.identifier.grantnumberNE/I022973/1en


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