[B-PT04] Biomineralization and Geochemistry of Proxies

convener:Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Jelle Bijma(Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung), Hiroshi Kitazato(Tokyo University of Marine Science and Technology (TUMSAT)), Kotaro Hirose(Faculty of Science and Engineering, Waseda University)

In order to reconstruct the Earth climate system, marine paleoclimatologists resort to transfer functions or geochemical proxies, which are produced or affected by organisms. The relationships used for reconstructions are generally based on field calibrations or derived from laboratory experiments. The danger of these so-called empirical relationships is that they may be valid only within the restricted parameter space of their calibration. Application of proxy relationships to very different environmental settings (e.g. high vs. low latitude or glacial vs. interglacial) requires a mechanistic understanding of these relationships. Much progress can be expected by a better understanding of the biomineralization mechanisms and the incorporation of proxy signals.
In this session we facilitate contributions related to the biomineralization, calibration and validation of marine proxies from field study, laboratory culture experiment and paleo-environmental reconstruction.

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[BPT04-01] Shell formation of foraminifera -marine unicellular calcifiers-

*Takashi Toyofuku^1,2, Yukiko Nagai^1,3 (1.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2.Tokyo University of Marine Science and Technology (TUMSAT), 3.National Museum of Nature and Science,Tokyo (NMNS))

[BPT04-02] Effect of euxinic conditions on planktic foraminifers: results from laboratory culture experiments and implications for oceanic anoxic events

*Azumi Kuroyanagi¹, Takashi Toyofuku², Yukiko Nagai², Katsunori Kimoto², Hiroshi Nishi¹, Reishi Takashima¹, Hodaka Kawahata³ (1.The Center for Academic Resources and Archives, Tohoku University, 2.JAMSTEC, 3.Atmosphere and Ocean Research Institute, The university of Tokyo)

[BPT04-03] Effects of larger benthic foraminifers from global warming analysed by Micro-X-ray CT

*Shunichi Kinoshita¹, Azumi Kuroyanagi², Hiroshi Nishi², Osamu Sasaki², Kazuhiko Fujita³, Atsushi Suzuki⁴, Hodaka Kawahata⁵ (1.Tohoku University, Graduate School of Science, 2.The Tohoku University Museum, 3.University of the Ryukyus, 4.Geological Survey of Japan National Institute of Advanced Industrial Science and Technology, 5.the University of Tokyo)

[BPT04-04] Foraminiferal calcification, CO₂, precipitation rates and element incorporation

*Lennart Jan de Nooijer¹, Takashi Toyofuku², Esmee Geerken¹, Gert-Jan Reichart¹ (1.Netherlands Institute for Sea Research, 2.JAMSTEC)

[BPT04-05] **The coral reef-dwelling Peneroplis pertusus brought to light: recalcification during culture experiments**

*Laurie Charrieau¹, Takashi Toyofuku¹, Yukiko Nagai¹, Katsunori Kimoto², Kazuhiko Fujita³ (1.X-STAR, JAMSTEC, 2.RIGC, JAMSTEC, 3.Department of Physics and Earth Sciences, University of the Ryukyus)

[BPT04-06] Variations in carbon and oxygen isotope composition and trace element concentrations of the modern brachiopod shells collected off Okinoshima

*Kazuma Oikawa¹, Hideko Takayanagi¹, Ryuichi Shinjo², Kazuyoshi Endo³, Masa-aki Yoshida⁴, Yasufumi Iryu¹ (1.Institute of Geology and Paleontology Graduate School of Science Tohoku University, 2.Department of Physics and Earth Sciences, University of the Ryukyus, 3.Department of Earth and Planetary Science, Tokyo University, 4.Shimane University Faculty of Life and Environmental Science)