Experimental determination of barium uptake in shells of the planktonic foraminifera Orbulina universa at 22°C

Lea, David W.; Spero, Howard J.

doi:10.1016/0016-7037(92)90352-j

Cited by 90 publications

(71 citation statements)

References 28 publications

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“…Lea and Spero, 1992;Russell et al, 2004). Juvenile (presphere) Orbulina universa and small G. bulloides were hand collected by SCUBA divers from surface waters of the San Pedro Basin, approximately 2 km NNE of the Wrigley Institute for Environmental Studies, Santa Catalina Island, California.…”

Section: Foraminifera Collection and Culturingmentioning

confidence: 99%

“…in relation to surface seawater Ba/Ca ratios (Hall and Chan, 2004a;Lea and Boyle, 1991), in cultured O. universa as a function of light intensity and seawater Ba concentration at constant temperature (Lea and Spero, 1992), and in cultured O. universa and G. sacculifer as a function of seawater [Ba], temperature and salinity in two different locations [O. universa from Santa Catalina Island in the NE Pacific at 22°C, S = 33.7, and O. universa and G. sacculifer from Lee Stocking Island, Bahamas at 29°C and S = 36.7; Lea and Spero, 1994]. Here we provide new constraints from culture experiments with O. universa and the symbiont barren Globigerina bulloides, grown under varying seawater pH, temperature, salinity, and two different light levels.…”

Section: Introductionmentioning

confidence: 99%

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Planktic foraminifers as recorders of seawater Ba/Ca

Hönisch

Allen

Russell

et al. 2011

Marine Micropaleontology

105

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Recent studies have used the Ba/Ca ratio of planktic foraminifer shells as a proxy for river run-off at oceanic sites near estuaries. Such studies assume that the Ba/Ca ratio in planktic foraminifer shells is primarily controlled by the Ba/Ca concentration of seawater and that other parameters such as salinity, temperature and pH do not compromise the primary Ba concentration relationship. Here we provide new insights from culture experiments and review published studies to confirm that environmental parameters including pH, temperature, salinity, and symbiont photosynthesis do not affect Ba substitution into planktic foraminiferal calcite. The partition coefficient for Ba in spinose planktic foraminifers is estimated as D Ba = 0.15 ± 0.05 (95% confidence limits). The same factor also seems applicable to the non-spinose genus Neogloboquadrina but not to specimens of the non-spinose genus Globorotalia.

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Section: Foraminifera Collection and Culturingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Planktic foraminifers as recorders of seawater Ba/Ca

Hönisch

Allen

Russell

et al. 2011

Marine Micropaleontology

105

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“…Most foraminiferal species incorporate Mg with one to two orders of magnitude lower concentration compared to non-biologically precipitated calcium carbonate (Katz, 1973;Bender et al, 1975;Bentov and Erez, 2006). The concentration of barium, on the other hand, is~10 times higher in foraminiferal calcite (Lea and Boyle, 1991;Lea and Spero, 1992) compared to inorganic precipitation results (Pingitore and Eastman, 1984). Additionally, elemental concentrations between foraminiferal species can vary by several orders of magnitude (up to two orders of magnitude for Mg; Bentov and Erez, 2006).…”

Section: Introductionmentioning

confidence: 99%

Biomineralization in perforate foraminifera

Nooijer

Spero

Erez

et al. 2014

Earth-Science Reviews

202

190

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a b s t r a c t a r t i c l e i n f oIn this paper, we review the current understanding of biomineralization in perforate foraminifera. Ideas on the mechanisms responsible for the flux of Ca 2+ and inorganic carbon from seawater into the test were originally based on light and electron microscopic observations of calcifying foraminifera. From the 1980s onward, tracer experiments, fluorescent microscopy and high-resolution test geochemical analysis have added to existing calcification models. Despite recent insights, no general consensus on the physiological basis of foraminiferal biomineralization exists. Current models include seawater vacuolization, transmembrane ion transport, involvement of organic matrices and/or pH regulation, although the magnitude of these controls remain to be quantified. Disagreement between currently available models may be caused by the use of different foraminiferal species as subject for biomineralization experiments and/or lack of a more systematic approach to study (dis)similarities between taxa. In order to understand foraminiferal controls on element incorporation and isotope fractionation, and thereby improve the value of foraminifera as paleoceanographic proxies, it is necessary to identify key processes in foraminiferal biomineralization and formulate hypotheses regarding the involved physiological pathways to provide directions for future research.

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“…Foraminifera were cultured using previously es-88 tablished methods (Lea and Spero, 1992;Ma-89 shiotta et al, 1997; Spero et al, 1997 (Rink et al, 1998 published procedures (Sanyal et al, 1996(Sanyal et al, , 1997 (Spivack and Edmond, 1986). …”

mentioning

confidence: 99%

The influence of symbiont photosynthesis on the boron isotopic composition of foraminifera shells

Hönisch

Biȷma

Russell

et al. 2003

Marine Micropaleontology

126

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11 12Culture experiments were carried out with the planktonic foraminifer Orbulina universa under high and low light 13 levels in order to determine the influence of symbiont photosynthetic activity on the boron isotopic composition of 14 shell calcite. Under low light (reduced photosynthetic rates) the boron isotopic composition of the tests is 1.5x lower 15 compared to shells grown under high light (elevated photosynthetic rates). In terms of inferred pH, the lower boron 16 isotope values correspond to a reduction in pH of approximately 0.2 units. The boron isotopic composition of 17 Orbulina universa from plankton tows is similar to that of shells grown under low light conditions in the laboratory. 18 These data are consistent with reduced symbiont concentrations in recently secreted shells. In addition to laboratory 19 and field grown O. universa, we present the first data for a symbiont-barren foraminifer, Globigerina bulloides. Data 20 obtained for G. bulloides fall V1.4x below those of the field grown O. universa. Although the plankton tow results 21 are preliminary, they support the hypothesis that respiration and photosynthesis are the key physiological parameters 22 responsible for species-specific vital effects. , 1996Spivack et al., 1993).

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Experimental determination of barium uptake in shells of the planktonic foraminifera Orbulina universa at 22°C

Cited by 90 publications

References 28 publications

Planktic foraminifers as recorders of seawater Ba/Ca

Planktic foraminifers as recorders of seawater Ba/Ca

Biomineralization in perforate foraminifera

The influence of symbiont photosynthesis on the boron isotopic composition of foraminifera shells

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