[B-PT03] Biomineralization and the Geochemistry of Proxies -Field ecology, Laboratory culture and Paleo

Sun. May 22, 2016 10:45 AM - 12:15 PM 101B (1F)

Convener:*Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Hiroshi Kitazato(Institute of Biogeosciences (BioGeos),Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Jelle Bijma(Alfred-Wegener-Institut fur Polar- und Meeresforschung), Simon Redfern(University of Cambridge), Chair:Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

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 maybe 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 biocalcification mechanisms and the incorporation of proxy signals.
In this session we failitate contributions related to the biocalcification, 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

[BPT03-07] Morphospecies, cryptic species or biological species…? Searching for the evolutionary significance of diversity in foraminifera

★Invited papers

*Agnes Katharina Weiner¹, Masashi Tsuchiya², Takashi Toyofuku², Hiroshi Kitazato² (1.JSPS/JAMSTEC, 2.JAMSTEC)

11:00 AM - 11:15 AM

[BPT03-08] Proteomic analysis of shell matrix proteins in the pond snail Lymnaea stagnalis: identification of potentially functional proteins

*Akito Ishikawa¹, Keisuke Shimizu², Yukinobu Isowa¹, Keiji Kito³, Manabu Fujie⁴, Nori Satoh⁴, Kazuyoshi Endo⁵ (1.University of Tokyo, Graduate School of Science, Department of Earth and Planetary Science, 2.JAMSTEC, 3.Meiji Univ., 4.OIST, 5.Univ. of Tokyo, Gladuate School of Science)

11:15 AM - 11:30 AM

[BPT03-09] Reefal microbial crusts found in a Holocene reef sediment core, off Okinawa Island, the Ryukyu Archipelago

*Kazuhiko Fujita¹, Tohru Sasaki¹, Masaaki Chinen¹ (1.Department of Physics and Earth Sciences, University of the Ryukyus)

11:30 AM - 11:45 AM

[BPT03-10] Syndepositional formation of calcareous nodules on muddy sea floor: elucidating depositional history by C, O, S isotope characterization

*Takashi Hasegawa¹, Yosuke Kobiyama² (1.Department of Earth Sciences, Kanazawa University, 2.Devision of Natural System, Graduate School of Natural Science and Technology, Kanazawa University)

11:45 AM - 12:00 PM

[BPT03-11] A novel approach in utilising marine methane seep derived bivalve shells for developing local ΔR corrections in deep sea environments

*Kazuhiro Yagasaki¹, Juichiro Ashi¹, Yusuke Yokoyama¹, Yosuke Miyairi¹, Shin'ichi Kuramoto² (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Center for Deep Earth Exploration, JAMSTEC)

12:00 PM - 12:15 PM

[BPT03-12] Oxygen isotope and Mg/Ca ratio of high magnesium calcite of benthic foraminifera as a proxy for water temperature

*Ayumi Maeda¹, Kazuhiko Fujita², Atsushi Suzuki³, Keiji Horikawa⁴, Toshihiro Yoshimura¹, Hodaka Kawahata¹ (1.Atomosphere and Ocean Research Institute, The University of Tokyo, 2.Department of Physics and Earth scieneces, University of the Ryukyus, 3.Geological Survey of Japan National Institute of Advanced Industrial Sience and Technology, 4.Graduate School of Engineer and Science, University of Toyama)