Nitrogen Fixation and the Production of Dissolved Organic Nitrogen in the North Pacific Ocean

北太平洋的固氮和溶解有机氮的生产

• 批准号: 0224498
• 负责人: Daniel Repeta
• 金额: $ 1.5万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-01 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0224498&HistoricalAwards=false
• 关键词: Nitrogen; Fixation; Production; Dissolved; Organic

ABSTRACTOCE-0224498Although dissolved organic nitrogen (DON) is the largest reservoir of fixed nitrogen in the surface ocean, little is know about its relationship to nitrogen fixation and the nitrogen nutrient requirements of the oceanic phytoplankton. In this Small Grant for Exploratory Research, investigators at the Woods Hole Oceanographic Institution will take advantage of a cruise to the centtral gyre of the North Pacific Ocean to study the relationship between climate variation, water column physics, the biological community dynamics of obligate diazotrophs, and the production of dissolved organic nitrogen. The research team will conduct observational studies as well as shipboard incubation experiments to determine how the fixed nitrogen generated by the activities of Trichodesmium and other diazotrophs are cycled in the surface ocean and how it relates to the pool of DON.

尽管溶解有机氮（DON）是海洋表层最大的固定氮库，但人们对它与海洋浮游植物的氮固定和氮营养需求的关系知之甚少。在这项探索性研究的小额赠款中，伍兹霍尔海洋研究所的研究人员将利用前往北太平洋中央环流的巡航，研究气候变化、水柱物理学、专性固氮生物群落动态和溶解有机氮生产之间的关系。 研究小组将进行观察性研究以及船上孵化实验，以确定束毛藻和其他固氮生物活动产生的固定氮如何在表层海洋中循环，以及它与DON池的关系。