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siximeiwen

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[求助] 有没大侠可以解释下bioturbation和bioirrigation这两个概念 已有1人参与

这两个过程对海底表层沉积物及孔隙水的影响分别是什么?谢谢!
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chemocean

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【答案】应助回帖

Bioturbation着重于沉积物固体颗粒,例如底栖生物的bioturbation可以让表层沉积物210-Pb分布均一,所以沉积速率需要在bioturbation层以下获得。而bioirrigation着重于间隙水,通过这个效应加速底层水和间隙水的溶质交换。数理模型可以参照“Diagenetic Models and Their Implementation: Modelling Transport and Reactions in Aquatic Sediments” by Bernard Boudreau。David Burdige 的“Geochemistry of Marine Sediments” 也有相关的讨论和模型描述。
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