Effects of light on the Ba/Ca ratios in coral skeletons

Yamazaki, Atsuko; Yano, Megumi; Harii, Saki; Watanabe, Tsuyoshi

doi:10.1016/j.chemgeo.2020.119911

Cited by 12 publications

(6 citation statements)

References 58 publications

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“…The incorporation of trace and minor elements and their stable isotopes into CaCO 3 skeletons has been studied extensively, including Li, B, Na, Mg, Sr, and Ba in coral skeletons (115,120,(158)(159)(160)(161)(162)(163) and Li, Na, Mg, Sr, Cl, and F in foraminiferan tests (105,(164)(165)(166)(167). Trace and minor element compositions of these biogenic carbonates deviate from calcite and aragonite precipitated abiotically from seawater (161,164).…”

Section: Trace and Minor Elementsmentioning

confidence: 99%

Biomineralization: Integrating mechanism and evolutionary history

et al. 2022

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Calcium carbonate (CaCO 3 ) biomineralizing organisms have played major roles in the history of life and the global carbon cycle during the past 541 Ma. Both marine diversification and mass extinctions reflect physiological responses to environmental changes through time. An integrated understanding of carbonate biomineralization is necessary to illuminate this evolutionary record and to understand how modern organisms will respond to 21st century global change. Biomineralization evolved independently but convergently across phyla, suggesting a unity of mechanism that transcends biological differences. In this review, we combine CaCO 3 skeleton formation mechanisms with constraints from evolutionary history, omics, and a meta-analysis of isotopic data to develop a plausible model for CaCO 3 biomineralization applicable to all phyla. The model provides a framework for understanding the environmental sensitivity of marine calcifiers, past mass extinctions, and resilience in 21st century acidifying oceans. Thus, it frames questions about the past, present, and future of CaCO 3 biomineralizing organisms.

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Section: Trace and Minor Elementsmentioning

confidence: 99%

Biomineralization: Integrating mechanism and evolutionary history

et al. 2022

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“…75 ± 0.14 over all the experimental range (temperature and Ba/Ca) and 1.76 ± 0.18 in the temperature experiment at Ba/Ca SW closest to our experimental value. Yamazaki et al (2021) measured D Ba for initial settled polyps of A. gutatus as a function of Ba concentration and light intensity. Their D Ba values were higher than all previous values ranging from 1.3 to 7.5 with higher values at lower light levels.…”

Section: El Valuesmentioning

confidence: 99%

The Distribution Coefficients of Major and Minor Elements in Coral Skeletons Under Variable Calcium Seawater Concentrations

Ram

Erez

2021

Front. Earth Sci.

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Coral skeletons are one of the best archives for past ocean seawater (SW) chemistry and isotopes. However, the distribution coefficients of major and minor elements in coral skeletons are not well determined. In this study, we launched an experiment to determine the distribution coefficients of multiple elements in corals’ skeletons by changing Ca concentrations in SW (CaSW). Two scleractinian corals, Pocillopora damicornis and Acropora cervicornis were cultured in modified Gulf of Eilat water (Red-Sea) with CaSW of approximately 10, 15, 20, and 25 mM. After almost three months, the newly grown skeletons were analyzed for the following elements: Li, Na, Mg, K, Sr, and Ba. Their ratios to Ca in the coral skeleton (El/Cacoral) increased linearly with El/CaSW (with R2 values above 0.98), crossing the origin and thus indicating constant distribution coefficient for each element over the experimental range of El/CaSW. The values of DEl were in good agreement with values reported for corals collected in natural seawater. However, differences were observed between the two species, and both were slightly deviating from inorganic aragonite D values. These deviations are well explained by Rayleigh fractionation process in the calcifying fluid (assuming it is mainly seawater). This was observed both for elements with D > 1 (Ba and Sr) and D < 1 (Li, Mg, Na, and K). P. damicornis showed open system behavior (∼20% of its Ca utilized) while A. cervicornis showed more closed calcifying reservoir (∼50% of its Ca utilized). The finding that the distribution coefficients of the six minor and trace elements are constant for a given species, should help in the reconstruction of past seawater chemistry based on multielement measurements in fossil corals. In particular, Na/Cacoral can be used to reconstruct past ocean Ca concentrations and with El/Cacoral ratios for other elements, their concentrations for the Cenozoic can be reconstructed.

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“…[Ba])/(the average [Ba]); (60.2 nM -43.0 nM)/52.8 nM = 33%). Culturing and inorganic experiment studies have both shown that Ba partitioning in aragonite is controlled by temperature, light and the aragonite growth rates (Gaetani and Cohen, 2006;Gonneea et al, 2017;Mavromatis et al, 2018;Yamazaki et al, 2021). However, considering that the three coral colonies in this study were mostly growing under similar environmental conditions (e.g.…”

Section: Barium Partition Coefficient Dbamentioning

confidence: 90%

“…However, several studies have shown that coral Ba/Ca ratios do not always correlate with flooding or upwelling events and show poor reproducibility between multi-colonies (Tudhope et al, 1996;Sinclair, 2005;Lewis et al, 2018;Tanzil et al, 2019). In addition to seawater Ba concentration, culturing experiments and multi-colony calibrations have found that Ba incorporation in coral skeletons can vary with temperature (Dietzel et al, 2004;Gaetani and Cohen, 2006;Gonneea et al, 2017), light (Yamazaki et al, 2021), coral species (LaVigne et al, 2016) and genotypes (Allison et al, 2018).…”

Section: Introductionmentioning

confidence: 99%