生物硅组成及对硅循环影响的研究进展

硅元素深刻影响着地表物质循环,是地表过程、陆海相互作用和全球碳循环研究的关键元素之一。在已有的陆-海生物硅研究中,大多数没有考虑生物硅组成在区域硅循环中的作用,因此开展不同来源与组成生物硅参与下的地表与陆-海硅循环研究是非常必要的。硅藻、硅鞭毛藻、植硅体、放射虫和海绵骨针是生物硅的主要存在形式,不同来源的生物硅由于化学性质的差异在硅生物地球化学循环过程中扮演着不同的角色,影响着生物硅的溶解速率与硅的埋藏等过程。今后应采用复合技术手段,重视"新硅"和"老硅"在硅循环中的差异化作用以及对分析测定结果的影响,并加强这方面的定量研究、过程与机理研究以及系统的综合性研究,特别是针对复杂的环境样品的多学科交叉综合研究。

The Research Progress in Biogenic Silica Composition and Its Impact on Silica Cycle

Silicon is the second most abundant element in the Earth’s surface material circulation,affecting land and aquatic ecosystems and global silicon cycle in the world. The diatom, silicoflagellates, phytolith, radiolarian, and sponge spicule are the main forms of biogenic silica in the land, river and estuary. In the previous studies, the biogenic silica from distinct sources plays a different role in the global silica biogeochemical cycle due to their differences in chemical properties, affecting the processes of dissolution rate and burial of the silica. A comprehensive studies considering the differentiation of the young and aged biogenic silica on silica cycling, and their impacts on silica measurement and analysis will be valued. Those researches including quantitative research, process and mechanical studies, systematic and comprehensive studies, especially the multidisciplinary studies focus on complex environmental samples will be strengthened in the future.