Biogeosciences (B)
Session Sub-category Paleontology(PT)
Session ID B-PT03
Title Biomineralization, Geochemistry, and Environmental Studies
Short Title Biomineralization and Proxies
Main Convener Name Takashi Toyofuku
Affiliation Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Co-Convener 1 Name Petra Heinz
Affiliation University of Vienna
Co-Convener 2 Name Kotaro Hirose
Affiliation Institute of Natural and Environmental Sciences, University of Hyogo
Co-Convener 3 Name Lennart Jan de Nooijer
Affiliation Royal Netherlands Institute for Sea Research
Session Language
E
Scope
This session aims to promote knowledge exchange focused on biomineralization: i.e., the biological component in the formation of hard tissues such as shells and skeletal structures. Specifically, the session seeks to explore the incorporation of major elements and fractionation of isotopes during the formation of biomineralized materials and the paleoceanographic applications of these proxies.
Over geologic time, various organisms have used biomineralization to produce a great diversity of minerals, including calcium carbonate, silicate glass, calcium phosphate, and iron oxide. These minerals precipitate in controlled microenvironments to form specialized structures in the form of shells and (exo)skeletons. Although many aspects of the biomineralization process have remained a mystery, recent advancements in observation technologies have begun to reveal the intricate architectures and sophisticated construction processes at the molecular level.
In paleoenvironmental reconstructions, there is a growing trend toward utilizing multi-proxy approaches by combining biomineral-based proxies, organic fossils, and sedimentary elemental analysis. While such multi-faceted interpretations hold the potential for robust environmental reconstructions, they also require a comprehensive understanding of various biases. These biases include the geological/oceanographic settings in which biogenic remnants were formed, taphonomic processes, and influences from organisms-particularly when their shells or skeletal configurations are not preserved in sediments, possibly due to dissolution processes.
In light of the above, this session invites submissions related to research based on field investigations, culture experiments, and other experimental and analytical methods in this field. The focus should be on the biomineralization, calibration, and evaluation of aquatic proxies and their applications in modern and paleo environmental reconstructions.
Presentation Format Oral and Poster presentation
Joint Session with EGU
Invited Authors Hiroaki Imai (Keio University)
Time Presentation No Title Presenter
Oral Presentation May 26 PM1
13:45 - 14:00 BPT03-01 New Caledonian Large Benthic Foraminiferal S/Ca signatures as sulfate seawater proxies: Results from controlled growth experiments Tobias Walla
14:00 - 14:15 BPT03-02 Oceanic Imprints: Deciphering the Life History of the Squid, Uroteuthis duvaucelii Through Statolith Microchemistry in the Tropical Western Pacific Jessica Managa Legaspi
14:15 - 14:30 BPT03-03 Search for diatom biomarkers by lipid analysis of diatom species from North Pacific Ocean Kotaro Hoshi
14:30 - 14:45 BPT03-04 Native-state ultrastructure characterization of foraminiferal biomineralization system Daniel Francois Do Nascimento Silva
14:45 - 15:10 BPT03-05 Nanotectonics of biominerals Hiroaki Imai
Oral Presentation May 26 PM2
15:30 - 15:45 BPT03-06 Ureolysis-driven microbially-induced carbonate precipitation under high-temperature and anoxic condition Xiulun Shen
15:45 - 16:00 BPT03-07 Elemental Profiles of a Japanese Precious Coral skeleton, Corallium japonicum :
new insights from an alive colony
Ma Marivic Capitle Pepino
16:00 - 16:15 BPT03-08 Functional Role of Nacrein in Molluscan Shell Biomineralization: Forming CaCO3 Cluster and Regulating Trace Metal Incorporation Yuto Namikawa
16:15 - 16:30 BPT03-09 Effects of the presence or absence of seaweeds on the physiological response of large benthic foraminifera under ocean acidification Yurie Ikemura
16:30 - 16:45 BPT03-10 Chemical sensing in living benthic foraminifera during the feeding process Laurie M. Charrieau
16:45 - 17:00 BPT03-11 Elemental Distribution Analysis in Calcareous Foraminiferal Cells: Calcium and Co-existing Elements—Insights from Cryo-FIB-SEM Takashi Toyofuku
Presentation No Title Presenter
Poster Presentation May 26 PM3
BPT03-P01 Temporal variation of lake environment over the past 24,000 years in the Lake Suwa, central Japan, based on diatom assemblages Shion Masaki
BPT03-P02 Analysis of Amino Acids Preserved in Miocene Fossil Shark tooth from Wajima, Japan, for Estimation of Trophic Levels Ayaka Shimizu
BPT03-P03 Visualization of microstructure on the shell surface of benthic foraminifera by EBSD method Souta Kawashima
BPT03-P04 The shell formation process of the foraminifera Sorites orbiculus -With special attention to the ultra-microstructure of the site of calcification Yukiko Nagai
BPT03-P05 Improved 3D imaging accuracy of diatoms using synchrotron micro X-ray CT Kotaro Hirose