OCE-PRF: Examining biological production and utilization of marine polyphosphate with integrated biogeochemical methods as an approach to broaden participation in ocean sciences

OCE-PRF：利用综合生物地球化学方法研究海洋聚磷酸盐的生物生产和利用，作为扩大海洋科学参与的一种方法

• 批准号: 1225801
• 负责人: Julia Diaz
• 金额: $ 17万
• 依托单位: Diaz Julia M
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-06-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1225801&HistoricalAwards=false
• 关键词: OCE; PRF; Examining; biological; production

In this project, the investigator will explore the cycling of phosphorus in the ocean by studying the biological mechanisms that shape the abundance, production, and utilization of marine polyphosphate.Although phosphorus (P) is a key nutrient that helps control marine biological productivity and microbial community composition, the origin and fate of up to 75% of marine dissolved P, collectively referred to as dissolved organic P (DOP), remains enigmatic. Research conducted by the investigator revealed that polyphosphate (poly-P) is an abundant component (~10%) of DOP throughout the world's ocean and is involved in critical global processes such as geologic P sequestration and global climate. However, as in the case for bulk DOP pools, very little is known about the biological mechanisms shaping the abundance, production, and utilization of marine poly-P. Given the profound ecosystem and climatic implications of poly-P cycling and its potential role as an abundant biological P source, understanding the microbial sources and sinks of poly-P that regulate its composition and surprisingly consistent global abundance remains a fundamental challenge in oceanography. Advances in the study of marine poly-P have historically been limited by a lack of analytical techniques; however, tools to fill critical knowledge gaps in marine poly-P cycling are now available through an integrated biogeochemical approach that combines the expertise and technical backgrounds of the investigator and sponsoring scientist. New mechanisms of poly-P production and microbial P assimilation discovered through this research have the potential to fundamentally advance biological models of P metabolism and transform current understanding of marine DOP by revealing new mechanisms that shape its composition, influence the linked cycles of other nutrients, oxygen, and carbon, and global climate.Educational broader impacts integrate with existing education and outreach opportunities at the host institution. The investigator will mentor two summer undergraduate students recruited through the Woods Hole Oceanographic Institution Minority Student Fellowship Program. Mentoring approaches are designed to advance discovery and substantially enrich the students' scientific contributions, personal experiences, and overall likelihood of continuing in ocean science. Additional broadening participation activities will contribute to the existing infrastructure of ocean science education and foster participation in the broader community. This project is supported under the NSF Ocean Sciences Postdoctoral Research Fellowship (OCE PRF) program, with goals to support novel research by early career scientists and increase the diversity of the U.S. ocean sciences workforce and research community. With OCE-PRF support, this project will enable a promising early career researcher to establish themselves in an independent research career related to ocean sciences and broaden participation of under-represented groups in the ocean sciences.

在这个项目中，研究人员将通过研究影响海洋聚磷酸盐丰度、生产和利用的生物机制来探索海洋中磷的循环。尽管磷(P)是有助于控制海洋生物生产力和微生物群落组成的关键营养物质，但高达75%的海洋溶解磷(统称为溶解有机磷(DOP))的来源和去向仍然是个谜。研究人员进行的研究表明，聚磷酸盐(PolyP)是全球海洋DOP的丰富组成部分(~10%)，参与了地质固磷和全球气候等关键的全球过程。然而，与散装DOP池的情况一样，人们对影响海洋聚磷丰度、生产和利用的生物机制知之甚少。鉴于多磷循环对生态系统和气候的深远影响及其作为一种丰富的生物磷来源的潜在作用，了解调节其组成和令人惊讶地一致的全球丰度的多磷的微生物源和汇仍然是海洋学中的一个根本挑战。海洋多磷研究的进展历来受到缺乏分析技术的限制；然而，现在可以通过综合生物地质化学方法获得填补海洋多磷循环关键知识空白的工具，这种方法结合了调查者和赞助科学家的专门知识和技术背景。通过这项研究发现的多磷生产和微生物磷同化的新机制有可能从根本上推进磷代谢的生物学模型，并通过揭示新的机制来改变对海洋DOP的理解，这些新机制塑造了海洋DOP的组成，影响了其他营养物质、氧和碳的相互联系的循环，以及全球气候。教育更广泛的影响与主办机构现有的教育和推广机会相结合。这位调查员将指导两名通过伍兹霍尔海洋研究所少数民族学生奖学金计划招募的暑期本科生。指导方法旨在促进发现并极大地丰富学生的科学贡献、个人经历和继续从事海洋科学的总体可能性。更多的扩大参与活动将有助于海洋科学教育的现有基础设施，并促进更广泛的社区的参与。该项目得到美国国家科学基金会海洋科学博士后研究奖学金(OCE PRF)计划的支持，旨在支持早期职业科学家的创新研究，并增加美国海洋科学劳动力和研究社区的多样性。在海洋科学和可持续发展基金的支持下，该项目将使有前途的早期职业研究人员能够从事与海洋科学有关的独立研究事业，并扩大未被充分代表的群体在海洋科学领域的参与。