近日，美国夏威夷太平洋大学Jessica C. Hankins团队研究了珊瑚钙化流体与海水饱和状态的多年解耦。相关论文发表在2025年8月29日出版的《科学进展》杂志上。

海洋酸化通过降低海水中文石的饱和状态（Ω_Ar）对珊瑚骨架的形成构成威胁。考虑到珊瑚的骨骼是从海水提供的钙化液体中沉淀出来的，理论上，海水Ω_Ar的减少应该会混淆钙化。

研究组使用拉曼光谱技术，在两个Porites sp.中以大约每月的分辨率重建了长达200年的珊瑚钙化流体Ω_Ar。珊瑚海地区的骨骼岩心，以研究（i）珊瑚钙化液Ω_Ar的调节和（ii）骨骼钙化对第三纪海洋酸化的反应。该研究结果显示，钙化液Ω_Ar显著增加，这表明一些珊瑚可能比短期实验室研究表明的更有效地适应了野外酸化的速度。

附：英文原文

Title: Multidecadal decoupling between coral calcifying fluid and seawater saturation states

Author: Jessica C. Hankins, Thomas M. DeCarlo

Issue&Volume: 2025-08-29

Abstract: Ocean acidification poses a threat to coral skeleton formation via reductions in the saturation state of aragonite (ΩAr) in seawater. Given that corals precipitate their skeletons from a calcifying fluid supplied by seawater, reductions in seawater ΩAr should, in theory, confound calcification. Here, we reconstruct up to 200 years of coral calcifying fluid ΩAr, using Raman spectroscopy techniques, at approximately monthly resolution in two Porites sp. skeletal cores from the Coral Sea region to investigate (i) the regulation of coral calcifying fluid ΩAr and (ii) the skeletal calcification response to industrial-era ocean acidification. Our results reveal a significant increase in calcifying fluid ΩAr, suggesting that some corals may adjust to the pace of acidification in the wild more effectively than suggested by short-term laboratory studies.

DOI: adr0264

Source: https://www.science.org/doi/10.1126/sciadv.adr0264