Role of phytoplankton in marine silicon cycling

浮游植物在海洋硅循环中的作用

• 批准号: RGPIN-2016-05791
• 负责人: Varela, Diana
• 金额: $ 2.11万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=634048
• 关键词: Role; phytoplankton; marine; silicon; cycling

Marine phytoplankton are key components of the Earth system. They contribute half of the world’s annual photosynthetic fixation of carbon and play a fundamental role in nutrient cycling in the ocean. Of all phytoplankton groups, diatoms account for 20% of Earth’s photosynthesis and are the main biological drivers of processes involved in the cycling of silicon, carbon, nitrogen and other nutrients. Production of silica cell walls by diatoms in surface waters, dissolution of this biogenic silica through the water column, and export of biogenic silica and associated carbon from surface to deep waters are some of the most important fluxes in the oceanic silicon and carbon cycles. This proposal describes an integrated field and laboratory program that will advance our understanding of these critical, but poorly known, processes of the silicon cycle. During the next 5 years, my objectives are to quantify:

海洋浮游植物是地球系统的关键组成部分。它们贡献了世界每年光合固碳的一半，并在海洋营养循环中发挥着根本作用。在所有浮游植物中，硅藻占地球光合作用的20%，是硅，碳，氮和其他营养物质循环过程的主要生物驱动力。表层沃茨中的硅藻产生二氧化硅细胞壁，这种生物二氧化硅通过水柱溶解，以及生物二氧化硅和相关碳从表层输出到深层沃茨是海洋硅和碳循环中最重要的通量。该提案描述了一个综合的现场和实验室计划，将促进我们对这些关键的，但鲜为人知的硅循环过程的理解。在未来五年，我们的目标是量化：