2 0 0 0 OA 生物源炭酸塩の同位体地球化学・実験生物学の高度化による環境生態指標の評価研究
- 著者
- 西田 梢
- 出版者
- 一般社団法人日本地球化学会
- 雑誌
- 地球化学 (ISSN:03864073)
- 巻号頁・発行日
- vol.56, no.1, pp.1-17, 2022-03-25 (Released:2022-03-25)
- 参考文献数
- 96
Climate changes, such as global warming and ocean acidification, are projected to affect survival, growth, and metabolic and physiological activities in marine calcifiers. To improve understanding of the future climate and its impact on marine calcifiers, development of environmental and ecological proxies by using culture experimental and isotope geochemical approaches are important. This review undertook recent advances in (1) culture experimental study that has implications for understanding the evolution of biomineralization and future impact on marine calcifiers, and in (2) environmental and ecological proxies by using stable and radio isotopes of biogenic carbonate to enhance understanding of the climate reconstruction and physiological effect under changing environment. The use of cultured specimens under well-controlled environmental conditions for geochemical studies will improve the application of environmental proxies, and will also be applicable for the estimation of carbon assimilation and physiological effect on calcification. In addition, micro-volume stable isotopic analysis will contribute to ensuring the reliability of international standard reference materials of carbonate and to promote high-resolution environmental reconstruction in collaboration with various research fields.
1 0 0 0 OA 貝類の炭素・酸素安定同位体比研究 生物源炭酸塩を活用した古生物研究への応用に向けて
- 著者
- 西田 梢
- 出版者
- 日本古生物学会
- 雑誌
- 化石 (ISSN:00229202)
- 巻号頁・発行日
- vol.107, pp.5-20, 2020-03-30 (Released:2020-04-13)
Molluscan shells record environmental and ecological information in regions from low to high latitudes that has implications for understanding the physiological mechanisms and evolution of biomineralization. To enhance the application of information derived from modern and fossil molluscan shells in paleontological research, I undertook a comprehensive review of recent studies of the stable carbon and oxygen isotopes of molluscs and other biogenic and synthetic carbonates and reinterpreted the isotopic compositions of molluscan shells by focusing on the mechanism of their mineralization. Standardization and correction of analytical isotopic values used in paleontological research, together with recent advances in micro-volume isotopic analysis and clumped isotope thermometry, will enhance their application in studies of modern and fossil biogenic carbonates.