南海表层沉积中深海介形虫分布
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摘要: 南海中、北部111个深海表层沉积物样品中介形虫定量分析表明,介形虫丰度和分异度在1000m以浅的陆坡上部最高,随深度增加碳酸盐溶解作用的加强而显着减少,至3000m,即浮游有孔虫溶跃层深度之下则罕见;埋葬群由67属204种组成,以Krithe占优势,其在样品中的平均含量达38.7%;种群中含典型的大洋性“冷水圈”深海介形虫,显然与经巴士海峡注入南海的太平洋中、深层水密切相关.文内列出了所有属种的深度分布,讨论了各水团中介形虫组合特征.
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