Collaborative Research: Using Biogeochemical and Genetic Tools to Unravel the Environmental Controls of Nitrogen Fixation and Denitrification in Heterotrophic Marine Sediments

合作研究：利用生物地球化学和遗传工具揭示异养海洋沉积物固氮和反硝化的环境控制

基本信息

批准号：
0926859
负责人：
Robinson Fulweiler
金额：
$ 23.93万
依托单位：
Trustees of Boston University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2009
资助国家：
美国
起止时间：
2009-09-15 至 2013-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926859&HistoricalAwards=false
关键词：
Collaborative Research Using Biogeochemical Genetic

项目摘要

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."Although the various pathways of nitrogen exchange at the sediment-water interface are critical to our understanding of ecosystem functions, existing nitrogen budgets underestimate the amount of nitrogen fixation taking place in the open ocean and marine sediments. Recent findings regarding the role of nitrogen fixation and denitrification in coastal systems suggest that nitrogen fixation may play a more significant role than previously believed. To address this, marine chemists from the Marine Biological Laboratory, Boston University, and the University of Rhode Island are examining the role of nitrogen fixation and the environmental controls of the N2 flux in coastal shelf sediments. Using a mixture of field sampling and laboratory analyses, these scientists will identify the organisms responsible for nitrogen fixation and trace the fate of nitrogen fixed in marine sediments. The results from this research will enhance the understanding of the environmental factors that control the nitrogen balance of marine ecosystems and the oceans as a whole. In addition to this research providing a greater understanding of the marine nitrogen cycle, it will provide outreach and education opportunities for the Girls Scouts of Rhode Island, as well as, support for multiple graduate students.

“该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。“尽管在沉积物 - 水界面上氮交换的各种途径对于我们对生态系统功能的理解至关重要，但现有的氮预算低估了氮固定量，而在开放海洋和海洋海洋中，氮固定量。关于氮固定和硝化作用在沿海系统中的作用的最新发现表明，氮固定可能起着比以前认为的更重要的作用。为了解决这个问题，来自海洋生物实验室，波士顿大学和罗德岛大学的海洋化学家正在研究氮固定的作用以及N2通量在沿海货架沉积物中的环境控制。这些科学家使用现场采样和实验室分析的混合物，将确定负责氮固定的生物，并追踪固定在海洋沉积物中的氮的命运。这项研究的结果将增强对控制海洋生态系统和整个海洋氮平衡的环境因素的理解。除了这项研究提供对海洋氮周期的更多了解，它将为罗德岛的女孩童子军以及对多位研究生的支持提供外展和教育机会。