Trace/minor element:calcium ratios in cultured benthic foraminifera. Part I: Inter-species and inter-individual variability

Hintz, C. J.; Shaw, Timothy J.; Chandler, G. Thomas; Bernhard, Joan M.; McCorkle, Daniel C.; Blanks, Jessica K.

doi:10.1016/j.gca.2005.12.018

Cited by 46 publications

(44 citation statements)

References 59 publications

(165 reference statements)

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“…This implies that differences in trace element composition between chambers can significantly affect trace element/Ca calibrations. Such an impact of intra-chamber heterogeneity of foraminiferal Mg incorporation on reconstructions of past seawater temperatures was previously suggested by Eggins et al (2003), Sadekov et al (2005), Hintz et al (2006) and Sadekov et al (2008). Nevertheless results from traditional Mg/Ca analyses (Anand et al, 2003) and laser ablation ICP-MS (this study) suggest similar foraminiferal Mg/Ca ratios for G. sacculifer at the same temperature Tables 1 and 2A and B experiment nos.…”

Section: Discussionsupporting

confidence: 78%

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Dueñas-Bohórquez

Rocha

Kuroyanagi

et al. 2009

Marine Micropaleontology

101

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Section: Discussionsupporting

confidence: 78%

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Dueñas-Bohórquez

Rocha

Kuroyanagi

et al. 2009

Marine Micropaleontology

101

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“…Salinity has been shown to increase foraminiferal Mg/Ca, especially in high-salinity settings such as the Red Sea or the Mediterranean (e.g., Nürnberg et al, 1996;Lea et al, 1999;Kisakürek et al, 2008;Groeneveld et al, 2008;Hoogakker et al, 2009;Dissard et al, 2010;Van Raden et al, 2011;Diz et al, 2012). Salinity in the deep Skagerrak is very stable throughout the year (35.0-35.3), both similar to openocean settings and to the culturing experiments of Hintz et al (2006a). The impact of low-salinity (20-30) surface water coming from the Baltic Proper, via the Baltic Current, does not reach the deep Skagerrak.…”

Section: Mg/ca In B Marginatamentioning

confidence: 76%

“…Temperature fluctuations in the Skagerrak at 300 m water depth during 2007 were less than 2 • C with an average of 7.3 • C ( Fig. 2a; SMHI Hintz et al (2006a) showed a range in the distribution coefficient of Mg from 0.5 to 15.1 × 10 −3 . It is therefore necessary to include a sufficient number of shells when analyzing Mg/Ca to obtain a representative average value for the sample.…”

Section: Mg/ca In B Marginatamentioning

confidence: 99%

“…Three out of eight stained samples for G. turgida yielded enough material (3-9 specimens per sample) for reliable ; "1"), multiple species (Lear et al, 2002; "2"); B. marginata (Wit et al, 2012;"3"), and B. marginata (Hintz et al, 2006a;"4"). Single measurements of and Wit et al (2012) were included to show the scatter when laser ablation is used on single specimens/chambers in comparison with our bulk measurements.…”

Section: Gullmar Fjordmentioning

confidence: 99%

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Mg/Ca and Mn/Ca ratios in benthic foraminifera: the potential to reconstruct past variations in temperature and hypoxia in shelf regions

Groeneveld

Filipsson

2013

Biogeosciences

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Abstract. Shelf and coastal regions are exceptionally important for many countries as they provide the main habitat for many economically important fish and shellfish species. With ongoing climate change and human-induced eutrophication the shelf regions are especially affected, resulting in increased temperatures and stratification as well as oxygen depletion of the bottom waters. In order to be able to predict the magnitude of these changes in the future, it is necessary to study how they varied in the past. Commonly used foraminiferal climate and environmental proxies, e.g., stable isotopes and trace metal/Ca ratios, that are applied in open-ocean settings are not necessarily applicable in shelf regions, either as faunas are significantly different or as conditions can change much faster compared to the open ocean. In this study we explore the use of Mg/Ca as paleothermometer and Mn/Ca as a potential proxy for changing dissolved oxygen conditions in bottom water on the benthic foraminifera Bulimina marginata and Globobulimina turgida. Living specimens were collected from the Skagerrak and the Gullmar Fjord (SW Sweden); the latter is hypoxic for several months a year. As the specimens were alive when collected, we assume it unlikely that any diagenetic coatings have already significantly affected the trace metal/Ca ratios. The Mg/Ca ratios are similar to previously published values but display much larger variation than would be expected from the annual temperature change of less than 2 °C. An additional impact of the difference in the calcite saturation state between the Skagerrak and the Gullmar Fjord could explain the results. Mn/Ca ratios from G. turgida can potentially be related to variations in dissolved oxygen of the habitat where the foraminifera calcify. Samples from the Skagerrak display increased Mn/Ca in specimens that lived deeper in the sediment than those that lived near the surface. G. turgida samples from the low-oxygen Gullmar Fjord showed significantly increased Mn/Ca, being highest when bottom water dissolved oxygen was at a minimum. Our study suggests that trace metal/Ca ratios in benthic foraminifera from shelf regions have the potential to record past variations in bottom water temperature and dissolved oxygen concentrations, but an additional impact of the inorganic carbonate chemistry cannot be excluded.

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“…The low reproduction rates observed here may indicate that the overall conditions for the experiment were perhaps suboptimal for this species, but that is not necessarily the case. Microcosm experiments similar to those conducted by Havach et al (2001) or Hintz et al (2006) might have improved the overall survival and chamber formation rate, but would have also introduced other complications, particularly with regard to keeping the trace element concentrations constant.…”

Section: Considerations Of Experimental Uncertaintiesmentioning

confidence: 99%

Heavy metal incorporation in foraminiferal calcite: results from multi-element enrichment culture experiments with <i>Ammonia tepida</i>

et al. 2010

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Abstract. The incorporation of heavy metals into carbonate tests of the shallow water benthic foraminifer Ammonia tepida was investigated under controlled laboratory conditions. Temperature, salinity, and pH of the culture solutions were kept constant throughout the duration of this experiment, while trace metal concentrations were varied. Concentrations of Ni, Cu, and Mn were set 5-, 10-, and 20 times higher than levels found in natural North Sea water; for reference, a control experiment with pure filtered natural North Sea water was also analysed. The concentrations of Cu and Ni from newly grown chambers were determined by means of both µ-synchrotron XRF and Laser Ablation Inductively Coupled Plasma Mass Spectroscopy (LA-ICP-MS). The results of both independent analytical techniques agreed within the analytical uncertainty. In general, the concentration of the analysed elements in the tests increased in line with their concentration in the culture solutions. Potential toxic and/or chemical competition effects might have resulted in the decreased incorporation of Ni and Cu into the calcite of the specimens exposed to the highest elemental concentrations. Mn incorporation exhibited large variability in the experiment with the 20-fold increased element concentrations, potentially due to antagonistic effects with Cu. The partition coefficients of Cu and Ni were calculated to be 0.14 ± 0.02 and 1.0 ± 0.5, respectively, whereas the partition coefficient of Mn was estimated to be least 2.4. These partition coefficients now open the way for reconstructing past concentrations for these elements in sea water.

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Trace/minor element:calcium ratios in cultured benthic foraminifera. Part I: Inter-species and inter-individual variability

Cited by 46 publications

References 59 publications

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Mg/Ca and Mn/Ca ratios in benthic foraminifera: the potential to reconstruct past variations in temperature and hypoxia in shelf regions

Heavy metal incorporation in foraminiferal calcite: results from multi-element enrichment culture experiments with <i>Ammonia tepida</i>

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Trace/minor element:calcium ratios in cultured benthic foraminifera. Part I: Inter-species and inter-individual variability

Cited by 46 publications

References 59 publications

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Mg/Ca and Mn/Ca ratios in benthic foraminifera: the potential to reconstruct past variations in temperature and hypoxia in shelf regions

Heavy metal incorporation in foraminiferal calcite: results from multi-element enrichment culture experiments with &lt;i&gt;Ammonia tepida&lt;/i&gt;

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Heavy metal incorporation in foraminiferal calcite: results from multi-element enrichment culture experiments with <i>Ammonia tepida</i>