[B-PT04] Biomineralization and the Geochemistry of Proxies

Sun. May 26, 2019 10:45 AM - 12:15 PM 201A (2F)

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

Biomineralization and the Geochemistry of Proxies - Biology, laboratory culture-experiments and their applications to the paleo-research -
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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10:45 AM - 11:00 AM

[BPT04-07] Skeleton microstructures of aposymbiotic scleractinian coral cultured in seawater with various Mg/Ca ratios

*Satoko Motai¹, Naotaka Tomioka¹, Jun Kawano², Saki Harii³, Takaya Nagai², Tsuyoshi Watanabe², Yu Kodama⁴, Motoo Ito¹ (1.Japan Agency for Marine-Earth and Technology, 2.Hokkaido University, 3.University of the Ryukyus, 4.Marine Works Japan)

11:00 AM - 11:15 AM

[BPT04-08] Skeletal formation of scleractinian corals in response to Mg/Ca fluctuation

*Tomihiko Higuchi¹, Ikuko Yuyama² (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.University of Tsukuba)

11:15 AM - 11:30 AM

[BPT04-09] Inter-specific variations in trace element concentrations of modern brachiopod shells collected from Otsuchi Bay, Japan

*Takuya Nishio¹, Hideko Takayanagi¹, Ryuji Asami¹, Ryuichi Shinjo², Koshi Yamamoto³, Yasufumi Iryu¹ (1.Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, 2.Graduate School of Engineering and Science, University of the Ryukyus, 3.Graduate School of Environmental Studies, Nagoya University)

11:30 AM - 11:45 AM

[BPT04-10] Trace element concentrations of sub-tropical modern brachiopod Basiliola lucida collected off Okinawa-jima, Japan

*Hideko Takayanagi¹, Tomoko Tochigi¹, Ryuji Asami¹, Ryuichi Shinjo², Takuya Itaki³, Yasufumi Iryu¹ (1.Tohoku University, 2.University of the Ryukyus, 3.Advanced Industrial Science and Technology (AIST))

11:45 AM - 12:05 PM

[BPT04-11] Structural difference between phaeodarians and radiolarians (unicellular zooplankton)

★Invited Papers

*Yasuhide Nakamura¹, Rie Hori, S.², Akihiro Tuji¹, Hiroaki Ohfuji², Noritoshi Suzuki³, Katsunori Kimoto⁴ (1.National Museum of Nature and Science, 2.Ehime University, 3.Tohoku University, 4.JAMSTEC)

Discussion (12:05 PM - 12:15 PM)

Session information