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Gupta et al. 2007
Gupta, L.P., Suzuki, A. and Kawahata, H. (2007). Endolithic aspartic acid as a proxy of fluctuations in coral growth. Journal of Geophysical Research 112. doi: 10.1029/2006JG000242. issn: 0148-0227.

Coral skeleton has been widely studied for monitoring past fluctuations in marine environment. Although stable carbon isotope (δ 13C) data appear to reflect coral metabolism, their interpretations differ from place to place and are sometimes controversial, because they are also affected by carbon isotopic composition of dissolved inorganic carbon in seawater. Association of an organic matrix with biological carbonates has been reported in many previous studies. With the help of high-resolution microsampling of coral skeleton and advanced technique for amino acid (AA) quantification in low-volume sample, we show that aspartic acid (Asp) in coral skeleton varies with distinct seasonal pattern, and is useful in understanding why corals calcify faster in summer than in winter. Since Asp containing organic matrix in the skeleton is synthesized by the coral, changes in mole concentration of Asp relative to other AAs of the skeleton make it a potential indicator for monitoring fluctuations in coral physiology in the past.

BACKGROUND DATA FILES

Abstract

Keywords
Biogeosciences, Biomineralization, Biogeosciences, Biosignatures and proxies, Geochemistry, Organic and biogenic geochemistry, Oceanography, General, Coral reef systems, Paleoceanography, Corals
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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