In situ distribution and characterization of the organic content of the oyster shell Crassostrea gigas (Mollusca, Bivalvia)
|Author(s)||Dauphin Yannicke1, Ball Alexander D.2, Castillo-Michel Hiram3, Chevallard Corinne4, Cuif Jean-Pierre1, Farre Bastien1, Pouvreau Stephane5, Salome Murielle3|
|Affiliation(s)||1 : Univ Paris 11, UMR IDES 8148, F-91405 Orsay, France.
2 : Nat Hist Museum, London SW7 5BD, England.
3 : ESRF, ID21, F-38043 Grenoble, France.
4 : CEA, IRAMIS, LIONS, UMR SIS2M 3299, F-91191 Gif Sur Yvette, France.
5 : IFREMER, Stn Argenton, F-29840 Argenton En Landunvez, France.
|Source||Micron (0968-4328) (Pergamon-elsevier Science Ltd), 2013-01 , Vol. 44 , P. 373-383|
|WOS© Times Cited||31|
|Keyword(s)||Biomineral, Mollusc shell, Infrared spectroscopy, Laser confocal Microscope, Micro-XANES|
|Abstract||Cultivation of commercial oysters is now facing the possible influence of global change in sea water composition, commonly referred to as "ocean acidification". In order to test the potential consequence of the predicted environmental changes, a cultivation experiment was carried out. The left and right valves of the oyster shell Crassostrea gigas differ in their structure; moreover, lenses of non compact layers are irregular. The shell layers of juvenile C. gigas are studied using a variety of highly spatially resolved techniques to establish their composition and structure. Our results confirm the presence of three different calcitic structural types. The role of the lenses of chalky layers is not yet deciplered. Despite a common mineralogy, the elemental composition of the layers differs. The sulphur aminoacids and sulphated polysaccharide contents of the intracrystalline and intercrystalline matrices differ, as well as those of the structural types. The possible different sensitivity of these structures to environmental changes is still unknown. (c) 2012 Elsevier Ltd. All rights reserved.|