JpGU-AGU Joint Meeting 2017

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[EE] Oral

B (Biogeosciences) » B-PT Paleontology

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

Sat. May 20, 2017 1:45 PM - 3:15 PM 201B (International Conference Hall 2F)

convener:Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Hiroshi Kitazato(University Reform Office, Tokyo University of Marine Science and Technology (TUMSAT)), Jelle Bijma(Alfred-Wegener-Institut Helmholtz-Zentrum f?r Polar- und Meeresforschung), Chairperson:Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

2:30 PM - 2:45 PM

[BPT03-04] What are constraint factores for foraminifers shape ? either Physics or Biology

*Hiroshi Kitazato1 (1.University Reform Office, Tokyo University of Marine Science and Technology (TUMSAT))

Keywords:Foraminifera, test morphology, single crystal, crystal physics, Biological constraints

Benthic foraminifers show genera specific test shapes. Test morphologies are different from species to species. Thusfar, foraminiferal tests are used as taxonomic characters. Patellina corrugata (Williamson) is made from single crystal of calcite. Even though the species has multi-chambered form, test consits of single crystal. Test growth takes place when calcite crystal grows. Is foraminiferal growth constraint by crystal physics or constraint by genetic inoformation ? I would like to discuss this question during my presentation. To grow with crystal physics, or not to be constraint by crystal physics ? This is the question.