Articles | Volume 14, issue 12
https://doi.org/10.5194/bg-14-3067-2017
https://doi.org/10.5194/bg-14-3067-2017
Research article
 | 
22 Jun 2017
Research article |  | 22 Jun 2017

Benthic foraminiferal Mn / Ca ratios reflect microhabitat preferences

Karoliina A. Koho, Lennart J. de Nooijer, Christophe Fontanier, Takashi Toyofuku, Kazumasa Oguri, Hiroshi Kitazato, and Gert-Jan Reichart

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Revised manuscript accepted for BG
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Cited articles

Balzer, W.: On the distribution of iron and manganese at the sediment/water interface: thermodynamic versus kinetic control, Geochim. Cosmochim. Ac., 46, 1153–1161, 1982.
Barber, R. T., Marra, J., Bidigare, R. C., Codispoti, L. A., Halpern, D., Johnson, Z., Latasa, M., Goericke, R., and Smith, S. L.: Primary productivity and its regulation in the Arabian Sea during 1995, Deep-Sea Res. Pt. II, 48, 1127–1172, 2001.
Barker, S., Greaves, M., and Elderfield, H.: A study of cleaning procedures used for foraminiferal Mg / Ca paleothermometry, Geochem. Geophy. Geosy., 4, 8407, https://doi.org/10.1029/2003GC000559, 2003.
Barnett, P. R. O., Watson, J., and Connelly, D.: A multiple corer for taking virtually undisturbed samples from shelf, bathyal and abyssal sediments, Oceanol Acta, 7, 399–408, 1984.
Boyle, E. A.: Manganese overgrowths on foraminifera tests, Geochim. Cosmochim. Ac., 47, 1815–1819, 1983.
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Here we report Mn / Ca ratios in living benthic foraminifera from the NE Japan margin. The results show that the Mn incorporation directly reflects the environment where the foraminifera calcify. Foraminifera that live deeper in sediment, under greater redox stress, generally incorporate more Mn into their carbonate skeletons. As such, foraminifera living close to the Mn reduction zone in sediment appear promising tools for paleoceanographic reconstructions of sedimentary redox conditions.
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