Crystal fabrics and element impurities (Sr/Ca, Mg/Ca, and Ba/Ca) in shells of Arctica islandica—Implications for paleoclimate reconstructions

Schöne, Bernd R.; Radermacher, Pascal; Zhang, Zengjie; Jacob, Dorrit E.

doi:10.1016/j.palaeo.2011.05.013

Cited by 79 publications

(60 citation statements)

References 58 publications

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“…Симптомы дефицита фосфора: заторможен-ность, нарушение системы крови (гемолитическая анемия, тромбоцитопения и другие), мышечные на-рушения вплоть до параличей, нарушения костной ткани и сердечной деятельности [9,29].…”

Section: суточная потребность и физиологическая норма содержания в крunclassified

Mineral «portrait» of human in health and disease.macronutrients, or two sides of the same coin — how vital it becomes dangerous

Ptushchenko¹,

Pasiyeshvili²

2017

Shidnoevr. z. vnutr. simejnoi med.

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The questions of elemental imbalance in relation to essential macronutrients are discussed in the paper. The main ones that are present in the human body are shown. These are the main ones that are present in the human body. There is a definite impact of macronutrient on the vital processes. Norms of minerals for different categories of patients are given in the paper. Dietary recommendations for macronutrient consumption during their shortage or surplus are reviewed. Basic modern diagnostic methods and dietary methods for correction of macronutrient imbalances are discussed.

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Section: суточная потребность и физиологическая норма содержания в крunclassified

Mineral «portrait» of human in health and disease.macronutrients, or two sides of the same coin — how vital it becomes dangerous

Ptushchenko¹,

Pasiyeshvili²

2017

Shidnoevr. z. vnutr. simejnoi med.

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“…При снижении их поступле-ния возрастает опасность накопления конкурирую-щего изотопа, к, примеру, кальция и стронция [26].…”

Section: таблицаunclassified

Mineral «portrait» of human in health and disease

Ptushchenko¹,

Pasiyeshvili²

2016

Shidnoevr. z. vnutr. simejnoi med.

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“…The long-lived bivalve mollusk A. islandica, common in the shelf seas of the temperate to subpolar North Atlantic Ocean, is an excellent high-resolution marine archive with a huge potential for monitoring pH as well as other seawater properties (for a recent review, see Schöne et al, 2013). This stationary benthic clam lives in water depths ranging from ∼ 10 m to as deep as 500 m and thrives in full marine conditions yet can also tolerate salinities as low as 28 PSU for short time intervals (Merrill and Ropes, 1968;Nicol, 1951).…”

Section: The Biogenic Archive Arctica Islandicamentioning

confidence: 99%

“…The metal to calcium ratio (Me/Ca) increased with shell age when the annual increment widths were below 30-200 µm. However, Schöne et al (2013) concluded that the faster-growing juvenile portion of the shells showed a weak relationship between Me / Ca and ambient temperature and results from different specimens were variable. Schöne et al (2013) proposed that pronounced vital effects may control the trace metal uptake in juvenile shells.…”

Section: Stable Sr Isotope Incorporation Into a Islandica And Sr Comentioning

confidence: 99%

“…However, Schöne et al (2013) concluded that the faster-growing juvenile portion of the shells showed a weak relationship between Me / Ca and ambient temperature and results from different specimens were variable. Schöne et al (2013) proposed that pronounced vital effects may control the trace metal uptake in juvenile shells. Our results are also consistent with the study of Schöne et al (2011b), where the juvenile portion of the two A. islandica shells with annual growth increments larger than 750 µm showed no obvious relationship between Me/Ca ratios and growth rates.…”

Section: Stable Sr Isotope Incorporation Into a Islandica And Sr Comentioning

confidence: 99%

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Environmental controls on the boron and strontium isotopic composition of aragonite shell material of cultured <i>Arctica islandica</i>

2015

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Abstract. Ocean acidification, the decrease in ocean pH associated with increasing atmospheric CO 2 , is likely to impact marine organisms, particularly those that produce carbonate skeletons or shells. Therefore, it is important to investigate how environmental factors (seawater pH, temperature and salinity) influence the chemical compositions in biogenic carbonates. In this study we report the first highresolution strontium ( 87 Sr / 86 Sr and δ 88 / 86 Sr) and boron (δ 11 B) isotopic values in the aragonite shell of cultured Arctica islandica (A. islandica). The 87 Sr / 86 Sr ratios from both tank water and shell samples show ratios nearly identical to the open ocean, which suggests that the shell material reflects ambient ocean chemistry without terrestrial influence. The 84 Sr-87 Sr double-spike-resolved shell δ 88 / 86 Sr and Sr concentration data show no resolvable change throughout the culture period and reflect no theoretical kinetic mass fractionation throughout the experiment despite a temperature change of more than 15 • C. The δ 11 B records from the experiment show at least a 5 ‰ increase through the 29-week culture season (January 2010-August 2010), with low values from the beginning to week 19 and higher values thereafter. The larger range in δ 11 B in this experiment compared to predictions based on other carbonate organisms (2-3 ‰) suggests that a species-specific fractionation factor may be required. A significant correlation between the pH (pH shell − pH sw ) and seawater pH (pH sw ) was observed (R 2 = 0.35), where the pH shell is the calcification pH of the shell calculated from boron isotopic composition. This negative correlation suggests that A. islandica partly regulates the pH of the extrapallial fluid. However, this proposed mechanism only explains approximately 35 % of the variance in the δ 11 B data. Instead, a rapid rise in δ 11 B of the shell material after week 19, during the summer, suggests that the boron uptake changes when a thermal threshold of > 13 • C is reached.

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Crystal fabrics and element impurities (Sr/Ca, Mg/Ca, and Ba/Ca) in shells of Arctica islandica—Implications for paleoclimate reconstructions

Cited by 79 publications

References 58 publications

Mineral «portrait» of human in health and disease.macronutrients, or two sides of the same coin — how vital it becomes dangerous

Mineral «portrait» of human in health and disease.macronutrients, or two sides of the same coin — how vital it becomes dangerous

Mineral «portrait» of human in health and disease

Environmental controls on the boron and strontium isotopic composition of aragonite shell material of cultured <i>Arctica islandica</i>

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Crystal fabrics and element impurities (Sr/Ca, Mg/Ca, and Ba/Ca) in shells of Arctica islandica—Implications for paleoclimate reconstructions

Cited by 79 publications

References 58 publications

Mineral «portrait» of human in health and disease.macronutrients, or two sides of the same coin — how vital it becomes dangerous

Mineral «portrait» of human in health and disease.macronutrients, or two sides of the same coin — how vital it becomes dangerous

Mineral «portrait» of human in health and disease

Environmental controls on the boron and strontium isotopic composition of aragonite shell material of cultured &lt;i&gt;Arctica islandica&lt;/i&gt;

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Environmental controls on the boron and strontium isotopic composition of aragonite shell material of cultured <i>Arctica islandica</i>