Novel analytical approach to bivalve shell biogeochemistry: A case study of hydrothermal mussel shell

Shirai, Kotaro; Takahata, Naoto; Yamamoto, Hiroyuki; Omata, Tamano; Sasaki, Takenori; Sano, Yuji

doi:10.2343/geochemj.42.413

Cited by 23 publications

(10 citation statements)

References 21 publications

(22 reference statements)

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“…Barium-to-calcium ratios have been shown to reflect Ba concentration in ambient seawater (Gillikin et al, 2006;Tabouret et al, 2012;Poulain et al, 2015) that might in some cases be associated with primary productivity. In contrast, manganese is often associated with shell precipitation rate and may also be influenced by seawater redox conditions, and therefore shows variable species specific patterns (Carré et al, 2006;Freitas et al, 2006Freitas et al, , 2009Shirai et al, 2008;Ullmann et al, 2013). Finally, molybdenum may be incorporated through diet, making Mo/Ca a potential proxy of paleoproductivity (Barats et al, 2010;Tabouret et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

A key to the past? Element ratios as environmental proxies in two Arctic bivalves

Vihtakari

Ambrose

Renaud³

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Understanding rapid climate change in the Arctic and its ecosystem implications requires more information on the environment at temporal resolutions and time-periods not available from instrumental records. Such information can be acquired through geochemical proxy records, but sub-annual records are rare. We analyzed shell material of bivalve mollusks (Serripes groenlandicus and Ciliatocardium ciliatum) placed on oceanographic moorings for one year in two Arctic fjords to assess the potential use of shell elemental ratios as environmental proxies.

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Section: Introductionmentioning

confidence: 99%

A key to the past? Element ratios as environmental proxies in two Arctic bivalves

Vihtakari

Ambrose

Renaud³

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The examined samples included the reef building branching coral Acropora nobilis (Shirai et al 2008a), deep sea solitary coral Caryophyllia ambrosia ambrosia (Shirai et al 2005), ocean quahog Arctica islandica (Shirai et al 2014), deep sea hydrothermal mussel Bathymodiolus platifrons (Shirai et al 2008b), and planktonic foraminifera Globorotalia menardii (Kunioka et al 2006). Samples were cleaned, embedded in epoxy resin, sectioned, polished, metal coated where necessary, and analyzed by electron probe microanalysis (EPMA) or high lateral resolution secondary ion mass spectrometry (NanoSIMS).…”

Section: Methodsmentioning

confidence: 99%

An Elemental Fractionation Mechanism Common to Biogenic Calcium Carbonate

Shirai

2018

Biomineralization

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Biological modulation of element incorporation presents a major hurdle in the interpretation of geochemical data as an environmental proxy, detailed understanding and quantitative evaluation of the mechanism of elemental fractionation both being essential for reliable reconstruction of an environment. Biogenic calcium carbonate has a specific skeletal microstructure, which is strongly controlled by biomineralization. Since primary processes are more likely reflected on a smaller spatial scale, elemental distribution patterns associated with skeletal microstructure should provide unique information on biological elemental fluctuations, which cannot be determined from large-scale analysis. To study elemental fractionation mechanisms, microscale elemental distribution patterns have been studied in coral skeletons and bivalve and foraminiferal shells and the skeletal microstructure, sulfur distribution, and organic features compared. The microanalytical studies revealed two characteristic patterns that were common to all studied biogenic calcium carbonates, even though the specimens examined represented different phyla: (1) significant compositional heterogeneities that could not be explained by changes in the ambient environment and (2) a strong correlation of "metal/Ca" ratios with all or some of sulfur distribution, skeletal microstructure, and organic character. Based on these common features, I propose a mechanism of elemental fractionation, commonly applicable to biogenic calcium carbonates and involving both composition and/or concentration of organics in the calcifying fluid, that facilitates preferential elemental incorporation into biogenic calcium carbonate.

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“…It should also be kept in mind that Mg and Sr are not solely substituting Ca in the crystal lattice, but can also be adhesively bound to crystal surfaces and covalently bound to organic materials (Shirai et al, 2014). There are also strong implications for a close relationship between the type of microstructure (or the underlying processes leading to the formation of different microstructures) and the amount of organics and Sr and Mg contents in bivalve shells (Shirai et al, 2008(Shirai et al, , 2014Freitas et al, 2009;Sch€ one, 2013). From the viewpoint of the palaeoceanographer, this is particularly relevant when, for example, Mg/Ca ratios are explored as palaeothermometers using low-Mg calcite or aragonite.…”

Section: Bivalvesmentioning

confidence: 99%

Mollusc and brachiopod skeletal hard parts: Intricate archives of their marine environment

Immenhauser

Schöne²,

Hoffmann

et al. 2015

Sedimentology

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The biogenic carbonate hard parts of fossil bivalves, cephalopods and brachiopods are among the most widely exploited marine archives of Phanerozoic environmental and climate dynamics research. The advent of novel analytical tools has led many workers to explore non-traditional geochemical and petrographic proxies, and work performed in neighbouring disciplines sheds light on the complex biomineralization strategies applied by these organisms. These considerations form a strong motivation to review the potential and problems related to the compilation and interpretation of proxy data from bivalve, cephalopod and brachiopod hard parts from the viewpoint of the sedimentologist and palaeoceanographer. Specific focus is on the complex biomineralization pathways of a given dissolved ion or food particle from its aquatic environment via the digestion and biomineralization apparatus in molluscs and brachiopods and its incorporation into a biomineral. Given that molluscs and brachiopods do not secrete their hard parts from seawater but rather from their mantle and periostracum, this paper evaluates differences and similarities of seawater versus that of body fluids. Cephalopods, bivalves and brachiopods exert a strong biological control on biomineralization that, to some degree, may buffer their shell geochemistry against secular changes in seawater chemistry. Disordered (amorphous) calcium carbonate precursor phases, later transformed to crystalline biominerals, may be significant in carbonate archive research due to expected geochemical offset relative to the direct precipitation of stable phases. A reasonable level of understanding of the related mechanisms is thus crucial for those who use these skeletal hard parts as archives of the palaeo-environment. The impact of what is commonly referred to as 'biological factors' on the geochemistry of mollusc and brachiopod hard parts is explored for conventional isotope systems such as carbon, oxygen, strontium and traditionally used element to calcium ratios. In particular, the often used d STATE OF THE SCIENCE the architecture of mollusc and brachiopod hard parts and their ultra-structures must guide sampling strategies for geochemical analyses. Where feasible, a detailed understanding of the diagenetic pathways and the application of multi-proxy and multi-archive approaches should form the foundation of fossil carbonate archive research. The uncritical compilation of large data sets from various carbonate-shelled organisms collected at different locations is not encouraged.

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Novel analytical approach to bivalve shell biogeochemistry: A case study of hydrothermal mussel shell

Cited by 23 publications

References 21 publications

A key to the past? Element ratios as environmental proxies in two Arctic bivalves

A key to the past? Element ratios as environmental proxies in two Arctic bivalves

An Elemental Fractionation Mechanism Common to Biogenic Calcium Carbonate

Mollusc and brachiopod skeletal hard parts: Intricate archives of their marine environment

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