Physiology and ecology of Fe and Cu in marine phytoplankton

海洋浮游植物中铁、铜的生理生态学

• 批准号: 261521-2008
• 负责人: Maldonado, Maria
• 金额: $ 3万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=455967
• 关键词: Physiology; ecology; Fe; Cu; marine

Marine phytoplankton, unicellular algae, play a critical role in the global carbon cycle, hence climate, by fixing atmospheric carbon dioxide (CO2) to organic carbon, a large portion of which is transported to the deep ocean. However, the ocean's capacity to biologically drawdown atmospheric CO2 today is lower than during the last ice-ages, as phytoplankton growth is limited by inadequate Fe supply in 30% of the world ocean. To improve our understanding of the carbon cycle, it is imperative to investigate the role of trace metals in controlling marine productivity and ecology in these Fe-limited regions. Laboratory and field studies will elucidate trace metal metabolism and transport in marine phytoplankton. We hope to provide new insights into how marine phytoplankton subsist under conditions of extreme iron deficiency and how individual metals (e.g. Fe, Cu, Cd) may act synergistically and antagonistically to affect oceanic primary productivity and phytoplankton species assemblage composition.

海洋浮游植物（单细胞藻类）通过将大气二氧化碳 (CO2) 固定为有机碳（其中很大一部分被输送到深海），在全球碳循环乃至气候中发挥着关键作用。然而，当今海洋通过生物方式减少大气中二氧化碳的能力低于上一个冰河时期，因为世界海洋中 30% 的海洋中浮游植物的生长受到铁供应不足的限制。为了提高我们对碳循环的理解，有必要研究痕量金属在控制这些铁有限区域的海洋生产力和生态方面的作用。 实验室和现场研究将阐明海洋浮游植物中的微量金属代谢和运输。 我们希望为海洋浮游植物如何在极度缺铁的条件下生存以及单个金属（例如铁、铜、镉）如何协同和拮抗地影响海洋初级生产力和浮游植物物种组合组成提供新的见解。