[B-PT02_1AM2] Biocalcification and the Geochemistry of Proxies

Thu. May 1, 2014 11:00 AM - 12:45 PM 421 (4F)

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

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 invite contributions related to the biocalcification, calibration and validation of marine proxies.

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11:00 AM - 11:15 AM

★ [BPT02-07] Internal pH distribution and post-metamorphic biomineralization in the tubeworm, Hydroides elegans

Vbs CHAN¹, *Takashi TOYOFUKU², G. WETZEL³, L. SARAF³, V. THIYAGARAJAN¹, A.s. MOUNT⁴ (1.Hong Kong University, 2.JAMSTEC, 3.Advanced Material Research Laboratory (AMRL), Clemson University, 4.Department of Biological Sciences, Clemson University)

11:15 AM - 11:30 AM

[BPT02-08] Genomic Exploration of the Nautilus' Shell Matrix Hydrophilic Proteins: An Insight To Their Evolution in Mollusks

*Davin SETIAMARGA¹, Kazuyoshi ENDO² (1.Japan Society for The Promotion of Science, 2.Graduate School of Science, The University of Tokyo)

11:30 AM - 11:45 AM

[BPT02-09] Using Acropora digitifera to bridge the gap between genome biology and geochemistry

*Tomoko BELL¹, Yusuke YOKOYAMA¹, Akira IGUCHI², Atsushi SUZUKI³ (1.Atmosphere and Ocean Research Institute, the University of Tokyo, 2.Department of Bioresources Engineering, Okinawa National College of Technology, 3.The National Institute of Advanced Industrial Science and Technology)

11:45 AM - 12:00 PM

[BPT02-10] Comprehensive identification of shell matrix proteins in brachiopods

*Yukinobu ISOWA¹, Isao SARASHINA², Kenshiro OSHIMA³, Keiji KITO⁴, Masahira HATTORI³, Kazuyoshi ENDO¹ (1.Graduate School of Science, Univ. Tokyo, 2.University Museum, Univ. Tokyo, 3.Graduate School of Frontier Sciences, Univ. Tokyo, 4.School of Agriculture, Meiji Univ.)

12:00 PM - 12:15 PM

[BPT02-11] Utility of nitrogen isotopic composition of amino acids in shell protein

*Yoshito CHIKARAISHI¹, Hidetaka NOMAKI¹, Masashi TSUCHIYA¹, Takashi TOYOFUKU¹, Naohiko OHKOUCHI¹, Hiroshi KITAZATO¹ (1.Japan Agency for Marine-Earth Science and Technology)

12:15 PM - 12:30 PM

[BPT02-12] Variation of North Atlantic nitrogen fixation in Caribbean coral skeletons

*Atsuko YAMAZAKI¹, Steffen HETZINGER², Jonas V. REUMONT², Carrie MANFRINO³, Urumu TSUNOGAI⁴, Tsuyoshi WATANABE⁵ (1.AORI, The University of Tokyo, 2.GEOMAR Helmholtz-Zentrum fur Ozeanforschung Kiel, 3.Central Caribbean Marine Institute, 4.Graduate School of Environmental Studies, Nagoya University, 5.Faculty of Science, Hokkaido University)

12:30 PM - 12:45 PM

[BPT02-13] Fluorometric analysis of photosymbiosis: Toward quantitative validation of ecological proxy of planktic foraminifers

*Haruka TAKAGI¹, Katsunori KIMOTO², Tetsuichi FUJIKI², Atsushi KURASAWA², Hiromichi HIRANO³ (1.CSE Grad. School, Waseda University, 2.Japan Agency for Marine-Earth Science and Technology, 3.Dep. Earth Sci., Sch. Edu., Waseda University)