Effect of CaCO3 (aragonite) saturation state of seawater on calcification of Porites coral
Effect of CaCO3 (aragonite) saturation state of seawater on calcification of Porites coral
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DOI：
10.2343/geochemj.38.613
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发表时间：
2004-01-01
影响因子：
0.8
通讯作者：
Hossain, MMM
中科院分区：
文献类型：
--
作者：
Ohde, S;Hossain, MMM
使用从冲绳珊瑚礁采集的活珊瑚，进行了实验室实验，以研究珊瑚钙化与25摄氏度海水文石饱和状态（Omega）之间的关系。在烧杯中培养的黄滨珊瑚的钙化速率随海水的欧米伽值（1.08-7.77）的增加而线性增加。Omega的钙化率（c）的增加趋势表示为方程c = aOmega + B（a，B：常数）。当欧米茄大于类似于4时，珊瑚样本在夜间钙化，表明暗钙化的证据。这项研究强烈表明，黄滨珊瑚的钙化依赖于周围海水的欧米茄。由于pCO（2）增加而导致的海水饱和状态的降低可能通过降低珊瑚的钙化率而降低珊瑚的造礁能力。
Using living corals collected from Okinawan coral reefs, laboratory experiments were performed to investigate the relationship between coral calcification and aragonite saturation state (Omega) of seawater at 25 degreesC. Calcification rate of a massive coral Porites lutea cultured in a beaker showed a linear increase with increasing Omega(aragonit) values (1.08-7.77) of seawater. The increasing trend of calcification rate (c) for Omega is expressed as an equation, c = aOmega + b (a, b: constants). When Omega was larger than similar to4, the coral samples calcified during nighttime, indicating an evidence of dark calcification. This study strongly suggests that calcification of Porites lutea depends on Omega of ambient seawater. A decrease in saturation state of seawater due to increased pCO(2) may decrease reef-building capacity of corals through reducing calcification rate of corals.