Japan Geoscience Union Meeting 2015

Presentation information

International Session (Oral)

Symbol B (Biogeosciences) » B-PT Paleontology

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

Tue. May 26, 2015 11:00 AM - 12:45 PM 104 (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), Chair:Jelle Bijma(Alfred-Wegener-Institut fur Polar- und Meeresforschung)

11:15 AM - 11:30 AM

[BPT03-07] Calcification mechanisms in foraminifera and proxy incorporation

*Jelle Bijma1, Gernot Nehrke1, Markus Raitsch1, NOOIJER, Lennart DE2, Antje Funcke1, Nina Keul3 (1.Marine Biogeosciences, Alfred Wegener Institute, 2.Marine Geology, Royal NIOZ, 3.Biology and Paleo Environment, Lamont-Doherty Earth Observatory)

Keywords:Calcification, proxy

Calcifying organisms, such as pteropods, bivalves, corals and foraminifera provide a rich resource for pale-oceanographers and ?climatologists because their geochemical make-up (proxies) can be used to reconstruct past ocean history and evolution during and after natural carbon perturbations. However, it has been shown for all geochemical proxies that the main assumption of only one environmental variable controlling a target proxy is too simple. Empirical calibrations introduce a lot of uncertainty because the mechanisms of proxy incorporation are not well understood. The major problem is that the calcification mechanisms are still a black box. In this presentation I will review our current understanding of calcification and proxy incorporation in foraminifera, specifically with respect to the impact of carbonate chemistry and the new opportunities arising from this.