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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Endolithic aspartic acid as a proxy of fluctuations in coral growth
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Endolithic aspartic acid as a proxy of fluctuations in coral growth

机译：内聚天冬氨酸作为珊瑚生长波动的代表

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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.
机译：珊瑚骨骼已被广泛研究以监测过去海洋环境的波动。尽管稳定的碳同位素（δ13C）数据似乎反映了珊瑚的新陈代谢，但是它们的解释因地而异，有时会引起争议，因为它们也受海水中溶解的无机碳的碳同位素组成影响。许多先前的研究已经报道了有机基质与生物碳酸盐的缔合。借助珊瑚骨骼的高分辨率显微采样和小批量样品中氨基酸（AA）定量的先进技术，我们显示了珊瑚骨骼中的天冬氨酸（Asp）随季节模式的变化而变化，并且对于理解为什么夏天的珊瑚比冬天的钙化更快。由于骨骼中含有有机基质的Asp是由珊瑚合成的，因此，相对于骨骼中其他AA的Asp摩尔浓度的变化使其成为过去监测珊瑚生理波动的潜在指标。

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