Metabolic effects on stable carbon isotopic composition of freshwater bivalve shell Corbicula fluminea

The stable isotopic composition of the bivalve shell has been widely used to reconstruct the pa-laeo-climate and palaeo-environment. The climatic and environmental significance of carbon isotopic composition of the bivalve shell is still in dispute, and incorporation of metabolic carbon can obscure...

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Bibliographic Details
Published in:Acta geochimica 2012-03, Vol.31 (1), p.103-108
Main Authors: Yan, Hui, Li, Zhongxuan, Lee, Xinqing, Zhou, Hui, Cheng, Hongguang, Chen, Jie
Format: Article
Language:English
Subjects:
Bivalvia
Corbicula fluminea
Earth and Environmental Science
Earth Sciences
Geochemistry
Isotopes
Metabolism
Mollusks
Paleoecology
Shells
代谢
双壳
河蚬
淡水贝类
溶解无机碳
生长过程
碳同位素记录
稳定碳同位素组成
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Summary:The stable isotopic composition of the bivalve shell has been widely used to reconstruct the pa-laeo-climate and palaeo-environment. The climatic and environmental significance of carbon isotopic composition of the bivalve shell is still in dispute, and incorporation of metabolic carbon can obscure carbon isotope records of dis-solved inorganic carbon. This study deals with freshwater bivalve, Corbicula fluminea aragonite shell. The results indicated that the δ13C values of bivalve shells deposited out of equilibrium with the host water and showed an onto-genic decrease, indicating that there are metabolic effects and more metabolic carbon is incorporated into larger shells. The proportion of metabolic carbon of shells varies between 19.8% and 26.8%. However, δ13CS can still be used as qualitative indicators of δ13CDIC and environmental processes that occurred during shell growth.
ISSN:1000-9426
2096-0956
1993-0364
2365-7499
DOI:10.1007/s11631-012-0555-5