Document of bibliographic reference 340034

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Carbon and oxygen isotope records of Tridacna squamosa shells from two different latitudes in the Ryukyu Islands

Abstract

We report carbon (δ¹³C) and oxygen (δ¹⁸O) isotope records of two modern giant clam (Tridacna squamosa) shells from two sites (Ishigaki-jima and Okinoerabu-jima) at different latitudes in the Ryukyu Islands, Japan. The δ¹³C profiles of samples from the inner shell layer on cross-sections along the maximum growth axis display no ontogenetic trends or seasonal variations. This finding suggests that the calcification site is likely to be unaffected by CO₂ uptake and release resulting from the metabolic activity of the molluscan host and algal symbionts. The δ¹⁸O profiles show distinct seasonal cycles. After accounting for the influence of seawater δ¹⁸O, the time-series variations are consistent with variations in sea surface temperature, and the temperature dependency of oxygen isotope fractionation is nearly identical to previously published δ¹⁸O–temperature relationships for biogenic and synthetic aragonite. We conclude that δ¹⁸O records from pristine fossils of this species will enable accurate paleoenvironmental reconstructions at high temporal resolution.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000637601500002

Bibliographic citation

Kodama, S.; Takayanagi, H.; Yoshii, K.; Nhu Ha, T.T.; Asami, R.; Abe, O.; Iryu, Y. (2021). Carbon and oxygen isotope records of Tridacna squamosa shells from two different latitudes in the Ryukyu Islands. Paleontological Research 25(2): 79-92. https://dx.doi.org/10.2517/2020pr003

Topic

Marine

Is peer reviewed

true