Files in this item
Influences of coral genotype and seawater pCO2 on skeletal Ba/Ca and Mg/Ca in cultured massive Porites spp. corals
Item metadata
dc.contributor.author | Allison, N. | |
dc.contributor.author | Cole, C. | |
dc.contributor.author | Hintz, C. | |
dc.contributor.author | Hintz, K. | |
dc.contributor.author | Finch, A. A. | |
dc.date.accessioned | 2019-06-10T23:39:18Z | |
dc.date.available | 2019-06-10T23:39:18Z | |
dc.date.issued | 2018-06-11 | |
dc.identifier | 253316146 | |
dc.identifier | 8a218c89-8971-452f-a120-0158fbcb41b1 | |
dc.identifier | 85048473893 | |
dc.identifier | 000438477700030 | |
dc.identifier.citation | Allison , N , Cole , C , Hintz , C , Hintz , K & Finch , A A 2018 , ' Influences of coral genotype and seawater pCO 2 on skeletal Ba/Ca and Mg/Ca in cultured massive Porites spp. corals ' , Palaeogeography, Palaeoclimatology, Palaeoecology , vol. In press . https://doi.org/10.1016/j.palaeo.2018.06.015 | en |
dc.identifier.issn | 0031-0182 | |
dc.identifier.other | ORCID: /0000-0002-3689-1517/work/45744964 | |
dc.identifier.other | ORCID: /0000-0003-3720-1917/work/45744974 | |
dc.identifier.uri | https://hdl.handle.net/10023/17864 | |
dc.description | This work was supported by the UK Natural Environment Research Council (award NE/I022973/1) to AAF and NA. | en |
dc.description.abstract | Coral skeletal Ba/Ca is a proxy for seawater Ba/Ca, used to infer oceanic upwelling and terrigenous runoff while [Mg2+] is implicated in the control of coral biomineralisation. We cultured large individuals (>12 cm diameter) of 3 genotypes of massive adult Porites spp. corals over a range of seawater pCO2 to test how atmospheric CO2 variations affect skeletal Ba/Ca and Mg/Ca. We identified the skeleton deposited after a 5 month acclimation period and analysed the skeletal Ba/Ca and Mg/Ca by secondary ion mass spectrometry. Skeletal Mg/Ca varies significantly between some duplicate colonies of the same coral genotype hampering identification of genotype and seawater pCO2 effects. Coral aragonite:seawater Ba/Ca partition coefficients (KD Ba/Ca) do not vary significantly between duplicate colonies of the same coral genotype. We observe large variations in KD Ba/Ca between different massive Porites spp. coral genotypes irrespective of seawater pCO2. These variations do not correlate with coral calcification, photosynthesis or respiration rates or with skeletal KD Mg/Ca or KD Sr/Ca. Seawater pCO2 does not significantly affect KD Ba/Ca in 2 genotypes but KD Ba/Ca is significantly higher at 750 μatm seawater pCO2 than at 180 μatm in 1 P. lutea genotype. Genotype specific variations in KD Ba/Ca between different Porites spp. could yield large errors (~250%) in reconstructions of seawater Ba when comparing Ba/Ca between corals. Analysis of fossil coral specimens deposited at low seawater pCO2, may underestimate past seawater Ba/Ca and ocean upwelling/freshwater inputs when compared with modern specimens but the effect is small in comparison with the observed difference between coral genotypes. | |
dc.format.extent | 772352 | |
dc.language.iso | eng | |
dc.relation.ispartof | Palaeogeography, Palaeoclimatology, Palaeoecology | en |
dc.subject | Calcification | en |
dc.subject | Photosynthesis | en |
dc.subject | Respiration | en |
dc.subject | KD Ba/Ca | en |
dc.subject | KD Mg/Ca | en |
dc.subject | Coral | en |
dc.subject | GE Environmental Sciences | en |
dc.subject | G Geography (General) | en |
dc.subject | QH301 Biology | en |
dc.subject | NDAS | en |
dc.subject.lcc | GE | en |
dc.subject.lcc | G1 | en |
dc.subject.lcc | QH301 | en |
dc.title | Influences of coral genotype and seawater pCO2 on skeletal Ba/Ca and Mg/Ca in cultured massive Porites spp. corals | en |
dc.type | Journal article | en |
dc.contributor.sponsor | NERC | en |
dc.contributor.institution | University of St Andrews. School of Earth & Environmental Sciences | en |
dc.contributor.institution | University of St Andrews. Marine Alliance for Science & Technology Scotland | en |
dc.contributor.institution | University of St Andrews. Scottish Oceans Institute | en |
dc.contributor.institution | University of St Andrews. St Andrews Isotope Geochemistry | en |
dc.identifier.doi | 10.1016/j.palaeo.2018.06.015 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2019-06-11 | |
dc.identifier.grantnumber | NE/I022973/1 | en |
This item appears in the following Collection(s)
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.