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黄海、渤海沉积物中生物硅的测定及存在问题的讨论

, PP. 129-134

Keywords: 黄海,渤海,沉积物,生物硅,存在问题

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Abstract:

硅是水生态系统中构成生物群落的重要元素[1].海洋中硅主要来源于河流输入(4.2±0.8)×1014g/a和热液喷发(1.9.77;10)×1014g/a[2].另外冰川风化、低温海底玄武岩风化、沉积物的成岩作用和大气沉降亦是其来源之一[3].沉积物中的生物硅又称生物蛋白石(简称蛋白石),指化学方法测定的无定形硅的含量,主要由硅藻、放射虫、硅鞭毛虫和海绵骨针组成.沉积物中蛋白石的积累反映了生产力在时间和空间尺度的变化[4,5].对于生物硅的测定,至今已提出了许多种方法.其中最灵敏、应用最广泛的是化学提取法[6,7].

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