河口海岸带硅的生物地球化学研究进展

Advances in bio-geochemistry of silicon in estuary and coastal zones

硅(Si)作为地壳中的第二大元素,是全球碳循环和陆—海相互作用过程中的关键元素之一。河口海岸带作为沟通陆地与海洋的关键区域,其间的硅循环过程受到了广泛的关注。对于河口而言,尤其是具有最大悬浊带的大潮河口,受沉降—再悬浮、生物硅(biogenic silica,BSi)的生消过程及悬浮物与水体之间发生的长期输运分离等因素的影响,硅的迁移转化过程可能极其复杂。因此,研究河口海岸带硅循环过程要综合考虑多因素耦合作用的影响。

Silicon （Si）, as the second largest element in the crust, is one of the key elements in the global carbon cycle and land sea interaction. The estuary and coastal zones are key areas for communication between land and sea, during which the silicon cycling process has received extensive attention. For the estuaries, especially the tide estuary with the largest suspension zone, the migration process of silicon might be extremely complex due to factors such as sedimentation - resuspension, biogenic silica （BSi） and the long-term transport separation between suspended matter and water. Therefore, it＇ s necessary to comprehensively consider the effects of multi-factor coupling in the study of the silicon cycling process in estuary and coastal zones.