摘要:
硅(Si)元素在地壳中的丰度位居第二(约占27%)，也是海洋生态系统中重要的生源要素。硅作为海洋浮游植物优势组分——硅藻生长所必需的营养元素，能够形成生源硅参与到硅循环中，并且是生物泵的重要载体，因此它的生物地球化学循环与全球碳循环及全球气候变化密切相关。生源硅的溶解作为海洋硅循环的重要组成部分，贯穿于从生源硅生成、沉降到埋藏的所有环节，是连接海表到海底的桥梁。本文概述了近年来海洋中有关生源硅溶解的研究进展，从动力学方程方面探讨了影响生源硅溶解速率的因素，并介绍了四种测定生源硅溶解速率的实验方法，指出目前研究中存在的问题，展望研究重点，以期为今后海洋硅循环的研究提供背景资料。
Abstract: Silicon, which represents 27% of the lithosphere, plays an important role in marine ecosystem, and it makes the linkage with the global carbon cycle and climate change, through the biological pump of CO2. Biogenic silica (BSi) is produced mainly by diatoms, which are the predominant algae in many areas of the world ocean. The dissolution be-havior of BSi can be a bridge for understanding of the ocean Si cycle, because of its close relation with the production, export and burial of BSi. In this paper, the present research progress of the marine BSi dissolution behavior are re-viewed, and the major controlling factors effected the dissolution rate of BSi are discussed from the point of dynamical equations, in addition, four methods determining the dissolution rate of BSi are introduced, including the method prob-lems at present, so as to provide background information for researching of ocean Si cycle in the future.