Collaborative Research: Chemical and Biological Characterizations of Phosphonate and Polyphosphate Dynamics in Marine Phytoplankton

合作研究：海洋浮游植物中磷酸盐和聚磷酸盐动力学的化学和生物学特征

• 批准号: 1060884
• 负责人: Ellery Ingall
• 金额: $ 21.65万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-05-01 至 2015-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1060884&HistoricalAwards=false
• 关键词: Collaborative; Research; Chemical; Biological; Characterizations

Phosphorus (P) is a recognized essential nutrient for marine primary production and its inorganic chemistry has been well studied. However, the dissolved organic phosphorus pool (DOP) has been little studied even given its importance as a phosphorus source to microorganisms. This project will identify biogenic sources of P compounds to DOP using controlled culture studies focused on phosphonate and polyphosphate. These compound classes exert important controls over P cycling, carbon fixation and community structure and export from the upper ocean, and long-term sequestration. The study will employ innovative methods, including molecular tools and novel chemical analyses, to examine specific phosphonate and polyphosphate compound production by key phytoplankton taxa under different environmental conditions. Four hypotheses are driving the proposed research and focus the study on the primary research questions. The study will improve our understanding of the production of specific P compounds, and provide insight into the bioavailability of DOP and the influence of P on biological production.The project will train three graduate students and there is a substantial outreach component associated with the study. The PIs will integrate education and outreach to K-12 communities using Whyville, an online virtual world geared specifically to 8-14 year old children. During this study, the investigators will expand the use of Whyville as a science learning tool through interactions with at-risk children as part of ScienceQuest, an after school program at a housing shelter, and through intensive summer short courses to school teachers.

磷（P）是公认的海洋初级生产必需营养素，其无机化学已得到充分研究。然而，即使考虑到溶解有机磷库（DOP）作为微生物磷源的重要性，它的研究也很少。该项目将通过以膦酸盐和多磷酸盐为重点的受控培养研究来确定 DOP 中 P 化合物的生物来源。这些化合物类别对磷循环、碳固定和群落结构以及从上层海洋的输出以及长期封存发挥着重要的控制作用。该研究将采用创新方法，包括分子工具和新颖的化学分析，以检查不同环境条件下关键浮游植物类群产生的特定膦酸盐和聚磷酸盐化合物。四个假设推动了拟议的研究，并将研究重点放在主要研究问题上。该研究将提高我们对特定 P 化合物生产的理解，并深入了解 DOP 的生物利用度以及 P 对生物生产的影响。该项目将培训三名研究生，并且有与该研究相关的大量外展部分。 PI 将利用 Whyville（一个专门针对 8-14 岁儿童的在线虚拟世界）将教育和外展活动整合到 K-12 社区。在这项研究中，研究人员将扩大 Whyville 作为科学学习工具的使用范围，通过与高危儿童的互动（作为住房收容所的课后计划 ScienceQuest 的一部分），以及为学校教师提供暑期强化短期课程。