Interactive comment on “A reappraisal of the vital effect in benthic foraminifera on Mg/Ca ratios: species specific uncertainty relationships” by J. C. Wit et al

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چکیده

This paper focuses on inter-individual variability and temperature sensitivity of Mg incorporation in calcite shells of the benthic foraminifer Bulimina marginata. The manuscript is well-written; in particular, the Discussion section is well-thought-through. The topics attract many readers interested in biocalcification and paleo-temperature reconstructions. However, I consider this paper needs moderate revision before being published in Biogeosciences for the following reasons.

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Interactive comment on “A reappraisal of the vital effect in benthic foraminifera on Mg/Ca ratios: species specific uncertainty relationships” by J. C. Wit et al

P4948 L7: I do not think Mg/Ca values correlate “well” with temperature because of R2=0.28. L18-21: The sentences give a vague impression. Better to rewrite more specifically.

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Interactive comment on “A reappraisal of the vital effect in benthic foraminifera on Mg/Ca ratios: species specific uncertainty relationships” by J. C. Wit et al

The Mg/Ca ratio of foraminiferal calcite is an established proxy for water temperature. The existence of species-specific differences in the Mg/Ca vs. temperature relationship is suggested to reflect "biological effects". Surprisingly, only few attempts have been made so far to further constrain and quantify biologically controlled Mg/Ca variability between specimens of the same species or betw...

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Interactive comment on “Variation in stable carbon and oxygen isotopes of individual benthic foraminifera: tracers for quantifying the vital effect” by T. Ishimura et al

[Dr. Fontanier’s comment] The paper entitled “Variation in stable carbon and oxygen isotopes of individual benthic foraminifera: tracers for quantifying the vital effect” by Ishimura San et al. deals with the applicability of inter-individual delta13C and delta18O distributions (Standard Deviation within species) to reconstruct the bottom water isotopic signatures. This work is based on live an...

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Interactive comment on “Variation in stable carbon and oxygen isotopes of individual benthic foraminifera: tracers for quantifying the vital effect” by T. Ishimura et al

The paper entitled “Variation in stable carbon and oxygen isotopes of individual benthic foraminifera: tracers for quantifying the vital effect” by Ishimura San et al. deals with the applicability of inter-individual delta13C and delta18O distributions (Standard Deviation within species) to reconstruct the bottom water isotopic signatures. This work is based on live and dead (assumed as modern)...

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Interactive comment on “Reconciling single chamber Mg/Ca with whole test δO in surface to deep dwelling planktonic foraminifera from the Mozambique Channel” by J. Steinhardt et al

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تاریخ انتشار 2012