Exceptional High Contribution of Metabolic Effects to Stable Carbon Isotope Composition of Experimental Cultured Freshwater Bivalve Shell

Abstract:

The stable isotope compositions of bivalve shells have been widely used to reconstruct palaeoclimate, but the metabolic effect obscured the climatic and environmental significance of the carbon isotope composition. In order to assess the contribution of metabolic C to the shell and ascertain whether its variations have any environmental or physiological significance, Corbicula fluminea (Müller, 1774) was bred in the laboratory last for one year; two shell samples (shell A and B) were selected at the end of the experiment to determine the carbon isotope composition of the shell increment that deposited during the experiment. The results indicated that ڄ¹³C_A ranged from 4.76 to 2.09 and ڄ¹³C_B from 8.49 to 2.89 . ڄ¹³C of shell A and B are both more negative than the predicted equilibrium value, indicated that the shells had used the metabolic carbon during the shell forming process. According to computation, the proportion of shell A was 32.0% to 52.0% (mean value 38.7%); and shell B was 42.7% to 92.1% (mean value 70.3%). Such exceptional high proportion of metabolic carbon to cultured C. fluminea shells quite different from the field C. fluminea shells and other previous studies results, and may suggest that the improper bred food that indicate by the slowly growth rate of species caused the bivalve abnormal biological behaviors, which induce complicated and exceptional metabolic effect. Therefore, it can be used as indicator of deviant food change events during bivalve growth.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 227-230
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.227
• Online since: June 2014
• Authors: Hui Yan*
• Keywords: Bivalve, Carbon Isotope, Corbicula fluminea, DIC, Metabolism

References

[1] Dettman D L, Reische A K, Lohmann K C: Geochimica et Cosmochimica Acta, Vol. 63(1999), p.1049.

DOI: 10.1016/s0016-7037(99)00020-4

[2] Gillikin D P, Lorrain A, Li M, Dehairs F: Geochimica et Cosmochimica Acta, Vol. 71(2007), p.2936.

DOI: 10.1016/j.gca.2007.04.003

[3] Grossman E L, Ku T L: Chemical Geology, Vol. 59(1986), p.59–74.

[4] Poulain C, Lorrain A, Mas R, Gillikin D P, Dehairs F, Robert R, Paulet Y-M: Chemical Geology, Vol. 272(2010), p.75.

DOI: 10.1016/j.chemgeo.2010.02.006

[5] Romanek C S, Grossman E L, Morse J W: Geochimica et Cosmochimica Acta, Vol. 56(1992), p.419.

[6] Wanamaker A D, Kreutz K J, Borns H W, Introne D S, Feindel S, Funder S, Rawson P D, Barber B J: Paleoceanography, Vol. 22 (2007), PA2217, doi: 10. 1029/2006PA001352.

DOI: 10.1029/2006pa001352

[7] Yan H, Lee X Q, Zhou H, Cheng H G, Peng Y, Zhou Z H: Geochemical Journal, Vol. 23(2009), p.379.

[8] Yan H, Li Z X, Lee X Q, Zhou H, Cheng H G, Chen J: Chinese Journal of Geochemistry, Vol. 31(2012), p.103.