Collaborative Research: Anammox and Denitrification in the Oxygen Deficient Zone of the Arabian Sea
合作研究:阿拉伯海缺氧区的厌氧氨氧化和反硝化
基本信息
- 批准号:0648026
- 负责人:
- 金额:$ 38.48万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2007
- 资助国家:美国
- 起止时间:2007-09-01 至 2011-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
OCE-0648026As one of the three regions of the world ocean that contains a permanent Oxygen Deficient Zone (ODZ), the Arabian Sea is disproportionately more important to the loss of fixed N from the ocean and to the oceanic flux of nitrous oxide (N2O) to the atmosphere than its size would predict. The generally accepted paradigm that canonical denitrification is responsible for both of these fluxes has recently been challenged by the finding that anaerobic ammonium oxidation (anammox) may even dominate denitrification for N2 production. Because the two processes are performed by different organisms with completely different physiologies that respond differently to environmental factors, it is necessary to accurately resolve their respective contributions in order to understand and predict fluxes in the N cycle. Although conventional anammox incubations suggest that anammox is the sole pathway of N2 production in the ODZ, this cannot be reconciled with stoichiometric constraints or with observed distributions of nitrite and N2O in the ODZ, which strongly suggest denitrification. Additionally, community composition and dynamics derived from molecular data suggest that denitrifiers must play an important role. In this research, researchers from Princeton and University of Washington hypothesize that the conventional incubation methods tend to artificially favor one or the other process because they alter the concentrations of their respective limiting factors. To test this hypothesis, they will investigate the response of anammox and denitrification to oxygen, ammonium, nitrite and organic carbon using large volume incubations in gas impermeable bags to obtain realistic estimates of the true rates of anammox and denitrification. The experiments will be carried out on a cruise in the Arabian Sea in collaboration with Indian colleagues. An important component of the broader impacts of the research is a strong collaboration between the Princeton and UW groups and their collaborators in India. This cooperation will provide opportunities to engage in a certain amount of technology transfer in stable isotope and molecular ecological techniques. At Princeton, the project will employ and provide summer and senior thesis research opportunities for undergraduates, and will translate into the classroom by experience and example in the undergraduate oceanography curriculum. Both institutions support department and institutional level outreach programs for teacher training and student research, and all the PIs will continue to participate in these at their respective institutions.
OCE-0648026 作为世界海洋中包含永久性缺氧区 (ODZ) 的三个区域之一,阿拉伯海对于海洋固定氮的流失以及海洋向大气中氧化亚氮 (N2O) 的通量的影响比其大小所预测的要严重得多。普遍接受的范式认为规范反硝化作用是造成这两种通量的原因,但最近发现厌氧氨氧化(厌氧氨氧化)甚至可能主导氮气生产的反硝化作用,这一发现对这一范式提出了挑战。由于这两个过程是由具有完全不同生理机能的不同生物体执行的,对环境因素的反应也不同,因此有必要准确地解析它们各自的贡献,以便理解和预测氮循环中的通量。尽管传统的厌氧氨氧化培养表明厌氧氨氧化是 ODZ 中产生 N2 的唯一途径,但这与化学计量限制或观察到的 ODZ 中亚硝酸盐和 N2O 的分布(强烈表明反硝化作用)不相符。此外,来自分子数据的群落组成和动态表明反硝化菌必须发挥重要作用。在这项研究中,普林斯顿大学和华盛顿大学的研究人员假设,传统的孵化方法往往人为地偏向于一种或另一种过程,因为它们改变了各自限制因素的浓度。为了检验这一假设,他们将在不透气袋中进行大量培养,研究厌氧氨氧化和反硝化对氧气、铵、亚硝酸盐和有机碳的响应,以获得对厌氧氨氧化和反硝化真实速率的实际估计。 这些实验将与印度同事合作在阿拉伯海的一艘游轮上进行。这项研究产生更广泛影响的一个重要组成部分是普林斯顿大学和威斯康星大学研究小组及其在印度的合作者之间的密切合作。此次合作将提供在稳定同位素和分子生态技术方面进行一定量技术转让的机会。 在普林斯顿大学,该项目将为本科生提供暑期和高级论文研究机会,并将通过本科海洋学课程中的经验和实例转化为课堂。两个机构都支持部门和机构层面的教师培训和学生研究外展计划,所有 PI 将继续在各自机构参与这些项目。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Anaerobic ammonium oxidation (anammox) and denitrification in Peru margin sediments
- DOI:10.1016/j.jmarsys.2018.09.007
- 发表时间:2020-07
- 期刊:
- 影响因子:2.8
- 作者:J. J. Rich-J.;P. Arevalo;B. Chang;A. Devol;B. Ward
- 通讯作者:J. J. Rich-J.;P. Arevalo;B. Chang;A. Devol;B. Ward
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Bess Ward其他文献
A microarray for assessing transcription from pelagic marine microbial taxa
用于评估远洋海洋微生物类群转录的微阵列
- DOI:
10.1038/ismej.2014.1 - 发表时间:
2014-01-30 - 期刊:
- 影响因子:10.000
- 作者:
Irina N Shilova;Julie C Robidart;H James Tripp;Kendra Turk-Kubo;Boris Wawrik;Anton F Post;Anne W Thompson;Bess Ward;James T Hollibaugh;Andy Millard;Martin Ostrowski;David J Scanlan;Ryan W Paerl;Rhona Stuart;Jonathan P Zehr - 通讯作者:
Jonathan P Zehr
Bess Ward的其他文献
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{{ truncateString('Bess Ward', 18)}}的其他基金
Nitrous Oxide Consumption in Surface Waters
地表水中一氧化二氮的消耗量
- 批准号:
2342493 - 财政年份:2024
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
Marine Diatom-Parasite Relationships in Upwelling Systems
上升流系统中的海洋硅藻与寄生虫的关系
- 批准号:
2149606 - 财政年份:2022
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
Collaborative Research: Biogeochemical Processes in a Subsurface Hypersaline Environment near the Abiotic Fringe
合作研究:非生物边缘附近地下高盐环境中的生物地球化学过程
- 批准号:
2026853 - 财政年份:2020
- 资助金额:
$ 38.48万 - 项目类别:
Continuing Grant
Nitrite Oxidation in Oxygen Minimum Zones
最低氧区中的亚硝酸盐氧化
- 批准号:
1946516 - 财政年份:2020
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
Collaborative Research: Mechanisms and Controls of Nitrous Oxide Production in the Eastern Tropical North Pacific Ocean
合作研究:热带北太平洋东部一氧化二氮产生的机制和控制
- 批准号:
1657663 - 财政年份:2017
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
EAGER: Novel genome-based method to measure taxon-specific phytoplankton growth rates in natural communities
EAGER:基于基因组的新方法来测量自然群落中特定分类单元的浮游植物生长率
- 批准号:
1747511 - 财政年份:2017
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
Dimensions: Collaborative Research: Functional Diversity of Marine Eukaryotic Phytoplankton and Their Contributions to the C and N Cycling
维度:合作研究:海洋真核浮游植物的功能多样性及其对碳氮循环的贡献
- 批准号:
1136345 - 财政年份:2012
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
Environmental control of microbial N20 fluxes and DIN loss in salt marsh sediments
盐沼沉积物中微生物 N20 通量和 DIN 损失的环境控制
- 批准号:
1019624 - 财政年份:2010
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
Collaborative Research: Control of Denitrification and Anammox in the Oxygen Deficient Waters of the Eastern Tropical North and South Pacific
合作研究:东部热带北太平洋和南太平洋缺氧水域反硝化和厌氧氨氧化的控制
- 批准号:
1029951 - 财政年份:2010
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
En-Gen: Genome-Enabled Environmental Functional Genomics and Expression Profiling of Diatoms in the Ocean
En-Gen:海洋硅藻的基因组环境功能基因组学和表达谱分析
- 批准号:
0722374 - 财政年份:2007
- 资助金额:
$ 38.48万 - 项目类别:
Standard Grant
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