[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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[BPT04-07] Validation and calibration of proxies to reconstruct past oxygenation using foraminifera: Shell Mn/Ca and porosity.

*Inge van Dijk^1,2, Christine Barras², Aurelia Mouret², Grit Steinhöfel¹, Emmanuelle Geslin ², Jelle Bijma¹ (1.Marine Biogeosciences, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany, 2.LPG UMR CNRS 6112, University of Angers, UFR Sciences, Angers, France)

[BPT04-08] Development of new proxies using macromolecular structures of marine palynomorphs

*Takuto Ando¹, Kazumi Matsuoka², Karin Zonneveld³, Gerard Versteegh^3,4 (1.Estuary Research Center, Shimane University, 2.Institute for East China Sea Research, Nagasaki University, 3.Center for Marine Environmental Sciences (marum), Bremen University, 4.Department of Earth and Environmental Science, Jacobs University Bremen)

[BPT04-09] Lipid biomarker analysis of culture samples of genus Tetraparma of the Parmales (Bolidophyceae)

*Ken Sawada¹, Yuki Hattori¹, Mutsuo Ichinomiya², Akira Kuwata³ (1.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 2.Prefectural University of Kumamoto, 3.Tohoku National Fisheries Research Institute)

[BPT04-10] Seasonal variation in assemblage of planktic foraminifera from the sediment trap samples in the Bay of Bengal

*Ayumi Maeda^1,2, Azumi Kuroyanagi³, Hiroshi Nishi³, Birgit Gaye⁴, Hodaka Kawahata^2,1 (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, 3.The Tohoku University Museum, Tohoku University, 4.Institute of Biogeochemistry and Marine Chemistry, University of Hamburg )

Cancelled

[BPT04-11] Temporal size changes of the Paragloborotalia siakensis (LeRoy) at ODP Site 807 in the western equatorial Pacific.

*Takuma Suzuki¹, Hiroki Hayashi¹ (1.Shimane University)

[BPT04-12] Recent changes of the diatom assemblages in relation to human-induced pollution in Baltic Sea coastal inlets.

*Kotaro Hirose¹, Hanna Nilsson^3,2, Karin Rengefors³, Olof Berglund³, Filipsson F. Helena² (1.Faculty of Science & Engineering, Waseda University, 2.Dept. of Geology, Lund University, Lund, Sweden, 3.Dept. of Biology, Lund University, Lund, Sweden)