【摘 要】
：
通过对南海中部沉积物捕集器中浮游有孔虫的氧、碳稳定同位素分析,探讨了它们与海洋学参数之间的关系.分析结果显示,G.ruber的δ18O值和δ13C值都比G.sacculifer的轻;两者的
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通过对南海中部沉积物捕集器中浮游有孔虫的氧、碳稳定同位素分析,探讨了它们与海洋学参数之间的关系.分析结果显示,G.ruber的δ18O值和δ13C值都比G.sacculifer的轻;两者的δ18O差值(Δδ18O)平均为0.520‰,δ13C差值(Δδ13C)平均为0.544‰,证明G.ruber的生活水深(约30 m)比G.sacculifer的(约50 m)浅.G.ruber与G.sacculifer之间的Δδ18O呈现夏季大、冬季小的特点,可能与海水的垂向温度梯度在夏季较大有关.G.ruber幼体的δ13C比成年个体的轻,幼体的δ18O比成年个体的重,揭示了该种在繁殖期前,随着个体发育,生活的水层深度逐渐变浅.
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