Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS

Rollion‐Bard, Claire; Blamart, Dominique; Trébosc, Julien; Tricot, Grégory; Mussi, Alexandre; Cuif, Jean‐Pierre

doi:10.1016/j.gca.2010.11.023

Cited by 99 publications

(69 citation statements)

References 55 publications

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“…Generally, aragonitic corals are enriched in 11 B when compared with a theoretical borate 11 B-pH curve (see Figures 3 and 5). The main vital effect typically used to describe 11 B-enrichment in corals, relative to seawater, is an increase in calcifying fluid pH at 355 the coral's site of calcification (e.g., Rollion-Bard et al, 2011b;Trotter et al, 2011;Anagnostou et al, 2012;. This hypothesis is supported by in situ measurements of pH using microelectrodes (e.g., Al-Horani et al, 2003;Ries, 2011), boron isotope analyses (e.g., Anagnostou et al, 2012;Krief et al, 2010;Trotter et al, 2011;McCulloch et al, 2012;Wall et al, 2016), and fluorescent pH dye data (Venn et al, 2009(Venn et al, , 2011(Venn et al, , 2013.…”

Section: Temperate Coralmentioning

confidence: 98%

δ11B as monitor of calcification site pH in marine calcifying organisms

Sutton

Liu

Ries

et al. 2017

Preprint

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Abstract. The isotope composition of boron (B) in marine biogenic carbonates has been predominantly studied as a proxy 15 for monitoring past changes in seawater pH and carbonate chemistry. In order to derive seawater pH from boron isotope ratio data, a number of assumptions related to chemical kinetics and themodynamic isotope exchange reactions are necessary. Furthermore, the boron isotope composition (

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Section: Temperate Coralmentioning

confidence: 98%

δ11B as monitor of calcification site pH in marine calcifying organisms

Sutton

Liu

Ries

et al. 2017

Preprint

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“…Furthermore, Takesue et al (2008) report trace element enrichment in the larger of two asymmetrical valves of the same individual of the aragonitic bivalve C. amurensis. It must again be noted that B incorporation is thought to be primarily via B(OH) − 4 competition with CO 2− 3 and not Ca 2+ (Hemming and Hanson, 1992), and it is not well understood how similar mechanisms of cation vs. anion transport operate (Allison et al, 2010) or how much incorporation of B(OH) 3 contributes to the presence of B in the shell (Rollion-Bard et al, 2011a). Thus, we stress the importance of testing B incorporation in different species and in different environments to explore biological mechanisms of incorporation.…”

Section: Calcificationmentioning

confidence: 99%

“…Recent work has revealed that both BO 3 and BO 4 groups have been found in both biogenic aragonite and calcite (Klochko et al, 2009;Rollion-Bard et al, 2011a;Sen et al, 1994), although it remains unclear whether the BO 3 species found in the crystal originates from boric acid in seawater or from a coordination change of the borate ion (Klochko et al, 2009;Sen et al, 1994). The residence time of Ca in the ocean is 1.1 million years (myr) (Broecker and Peng, 1982) and that of B is estimated between 14 and 20 myr (Pagani et al, 2005;Spivack and Edmond, 1987;Lemarchand et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Exploring B/Ca as a pH proxy in bivalves: relationships between Mytilus californianus B/Ca and environmental data from the northeast Pacific

et al. 2011

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Abstract.A distinct gap in our ability to understand changes in coastal biology that may be associated with recent ocean acidification is the paucity of directly measured ocean environmental parameters at coastal sites in recent decades. Thus, many researchers have turned to sclerochronological reconstructions of water chemistry to document the historical seawater environment. In this study, we explore the relationships between B/Ca and pH to test the feasibility of B/Ca measured on the ion probe as a pH proxy in the California mussel, Mytilus californianus. Heterogeneity in a range of ion microprobe standards is assessed, leading to reproducible B/Ca ratios at the 5 % level. The B/Ca data exhibit large excursions during winter months, which are particularly pronounced during the severe winters of 2004-2005 and 2005-2006. Furthermore, B/Ca ratios are offset in different parts of the skeleton that calcified at the same time. We compare the M. californianus B/Ca record to directly measured environmental data during mussel growth from the period of 1999-2009 to examine whether seawater chemistry or temperature plays a role in controlling shell B/Ca. A suite of growth rate models based on measured temperature are compared to the B/Ca data to optimise the potential fit of B/Ca to pH. Despite sampling conditions that were well-suited to testing a pH control on B/Ca, including a close proximity to an environmental record, a distinct change in pH at the sampling locale, and a growth model designed to optimise the correlations between seawater pH and shell B/Ca, we do not see a strong correlations between pH and shell B/Ca (maximum coefficient of determination, r 2 , of 0.207). Instead, our data indicate a strong biological control on B/Ca as observed in some other carbonate-forming organisms.

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“…However Klochko et al (2009) reported 36% of boron in trigonal co-ordination (B3) in the shallow tropical coral Porites spp. while Rollion Bard et al (2011) identified 18% and 48% B3 in the skeletal fibres and centres of calcification respectively of a deep water coral. Klochko et al (2009) and report good agreement between the observed aragonite δ 11 B and that predicted from the incorporation of B(OH)4 -, leading both to conclude that any B3 was initially incorporated as B4 and then underwent a coordination change whilst preserving the original B(OH)4 -isotopic signature.…”

Section: Introductionmentioning

confidence: 97%

“…Klochko et al (2009) and report good agreement between the observed aragonite δ 11 B and that predicted from the incorporation of B(OH)4 -, leading both to conclude that any B3 was initially incorporated as B4 and then underwent a coordination change whilst preserving the original B(OH)4 -isotopic signature. In contrast, in the deep sea coral, high B3 was associated with low δ 11 B suggesting that B(OH)3 was incorporated in the skeletal centres of calcification (Rollion Bard et al, 2011). During this research we avoided the analysis of centres of calcification and we assume that coral skeletal boron is derived from dissolved B(OH)4 -.…”

Section: Introductionmentioning

confidence: 99%

The effect of ocean acidification on tropical coral calcification: insights from calcification fluid DIC chemistry

Allison¹

2018

Preprint

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Ocean 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 δ 11 B) 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 CO3 ). 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.

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Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS

Cited by 99 publications

References 55 publications

δ<sup>11</sup>B as monitor of calcification site pH in marine calcifying organisms

δ<sup>11</sup>B as monitor of calcification site pH in marine calcifying organisms

Exploring B/Ca as a pH proxy in bivalves: relationships between <I>Mytilus californianus</I> B/Ca and environmental data from the northeast Pacific

The effect of ocean acidification on tropical coral calcification: insights from calcification fluid DIC chemistry

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Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS

Cited by 99 publications

References 55 publications

δ&lt;sup&gt;11&lt;/sup&gt;B as monitor of calcification site pH in marine calcifying organisms

δ&lt;sup&gt;11&lt;/sup&gt;B as monitor of calcification site pH in marine calcifying organisms

Exploring B/Ca as a pH proxy in bivalves: relationships between &lt;I&gt;Mytilus californianus&lt;/I&gt; B/Ca and environmental data from the northeast Pacific

The effect of ocean acidification on tropical coral calcification: insights from calcification fluid DIC chemistry

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δ<sup>11</sup>B as monitor of calcification site pH in marine calcifying organisms

δ<sup>11</sup>B as monitor of calcification site pH in marine calcifying organisms

Exploring B/Ca as a pH proxy in bivalves: relationships between <I>Mytilus californianus</I> B/Ca and environmental data from the northeast Pacific