Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy (Articolo in rivista)

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  • Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.epsl.2011.01.030 (literal)
Alternative label
  • Julie Trotter a, , , Paolo Montagna b, c, d, Malcolm McCulloch a, e, Sergio Silenzi f, Stéphanie Reynaud g, Graham Mortimer h, Sophie Martin i, j, k, l, Christine Ferrier-Pagès g, Jean-Pierre Gattuso i, j, Riccardo Rodolfo-Metalpam, n (2011)
    Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy
    in Earth and planetary science letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Julie Trotter a, , , Paolo Montagna b, c, d, Malcolm McCulloch a, e, Sergio Silenzi f, Stéphanie Reynaud g, Graham Mortimer h, Sophie Martin i, j, k, l, Christine Ferrier-Pagès g, Jean-Pierre Gattuso i, j, Riccardo Rodolfo-Metalpam, n (literal)
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  • 163 (literal)
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  • 303 (literal)
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  • 11 (literal)
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  • 3-4 (literal)
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  • ISI Web of Science (WOS) (literal)
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  • a The UWA Oceans Institute and School of Earth and Environment, Faculty of Natural and Agricultural Sciences, The University of Western Australia, Crawley 6009, Western Australia, Australia b Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, USA c Laboratoire des Sciences du Climat et de l'Environnement, Av. de la Terrasse, 91198, Gif-sur-Yvette, France d Institute of Marine Sciences, CNR, Via Gobetti, 101, Bologna, Italy e ARC Centre of Excellence in Coral Reef Studies, The University of Western Australia, Crawley 6009, Western Australia, Australia f Institute for Environmental Protection and Research, Via di Casalotti, 300-00166 Rome, Italy g Centre Scientifique de Monaco, Av. Saint Martin, MC-98000 Monaco h Research School of Earth Sciences, The Australian National University, Canberra, 0200, Australia i INSU-CNRS, Laboratoire d'Océanographie de Villefranche, B.P. 28, 06234 Villefranche-sur-mer Cedex, France j Université Pierre et Marie Curie, Observatoire Océanologique de Villefranche, 06230 Villefranche-sur-mer, France k CNRS, Laboratoire Adaptation et Diversité en Milieu Marin, UMR 7144, Station Biologique de Roscoff, 29682 Roscoff, France l Université Pierre et Marie Curie, Paris 6, Laboratoire Adaptation et Diversité en Milieu Marin, UMR 7144, Station Biologique de Roscoff, 29682 Roscoff, France m Marine Institute, Marine Biology and Ecology Research Centre, University of Plymouth, PL4 8AA, Plymouth, UK n International Atomic Energy Agency, 4 Quai Antoine 1er, BP 800, MC98012 Monaco (literal)
Titolo
  • Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy (literal)
Abstract
  • Boron isotopic and elemental systematics are used to define the vital effects for the temperate shallow water Mediterranean coral Cladocora caespitosa. The corals are from a range of seawater pH conditions (pH(T) similar to 7.6 to similar to 8.1) and environmental settings: (1) naturally living colonies harvested,from normal pH waters offshore Levanto, (2) colonies transplanted nearby a subsea volcanic vent system, and (3) corals cultured in aquaria exposed to high (700 mu atm) and near present day (400 mu atm) pCO(2) levels. BiCa compositions measured using laser ablation inductively coupled mass spectrometry (LA-ICPMS) show that boron uptake by C caespitosa cultured at different pCO(2) levels is independent of ambient seawater pH being mainly controlled by temperature-dependent calcification. In contrast, the boron isotope compositions (delta(11)B(carb)) of the full suite of corals determined by positive thermal ionisation mass spectrometry (PTIMS) shows a clear trend of decreasing delta(11) B(carb) (from 26.7 to 22.2%.) with decreasing seawater pH. reflecting the strong pH dependence of the boron isotope system. The delta(11)B(carb) compositions together with measurements of ambient seawater parameters enable calibration of the boron pH proxy for C caespitosa, by using a new approach that defines the relationship between ambient seawater pH (pH,) and the internally controlled pH at the site of calcification (pH(biol)). C. caespitosa exhibits a linear relationship between pH(sw) and the shift in pH due to physiological processes (Delta pH = pH(biol) - pH(sw)) giving the regression Delta pH(clad) = 4.80 - 0.52 x pH(sw) for this species. We further apply this method (\"Delta pH-pH(sw)\") to calibrate tropical species of Porites, Acropora, and Stylophora reported in the literature. The temperate and tropical species calibrations are all linearly correlated (r(2)> 0.9) and the biological fractionation component (pH) between species varies within similar to 0.2 pH units. Our \"Delta pH-pH(sw)\" approach provides a robust and accurate tool to reconstruct palaeoseawater pH, for both temperate and tropical corals, further validating the boron fractionation factor (alpha(B3)-(B4) = 1.0272) determined experimentally by Klochko et al. (2006) and the boron isotope pH proxy, both of which have been the foci of considerable debate. (C) 2011 Elsevier B.V. All rights reserved. (literal)
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