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

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.