Collaborative Research: Predicting Controls of Partitioning between Dissimilatory Ntirate Reduction to Ammonium (DNRA) and Dinitrogen Production in Marine Sediments
合作研究:预测海洋沉积物中异化硝酸盐还原成铵(DNRA)和氮生成之间的分配控制
基本信息
- 批准号:1635099
- 负责人:
- 金额:$ 37.02万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2016
- 资助国家:美国
- 起止时间:2016-09-01 至 2021-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Microbial processes in marine sediments play a major role in the global nitrogen cycle. Because the presence of nitrogen compounds dissolved in seawater largely controls biological growth, understanding how the sedimentary nitrogen budget changes with altered circulation, acidity, and biological productivity is of critical importance to predict oceanic function in future climate scenarios. Surprisingly, we do not know definitively if nitrogen exchange between sediments and the water column is in balance, and if not, how it varies over time and space. We do know that two bacterially mediated chemical reactions are primarily responsible for removing nitrogen from marine ecosystems by converting biologically usable forms of dissolved nitrogen back to nitrogen gas (N2) that is not generally available for biological production. These reactions are called denitrification and anaerobic ammonium oxidation (anammox); the latter operating only where oxygen is zero. This project will investigate a third reaction, called dissimilatory nitrate reduction (DNRA), which competes directly with anammox to limit N2 production and the consequent "loss" of nitrogen, thus retaining nitrogen for use in marine ecosystems. The role of DNRA has not been fully explored and quantifying this reaction could help evaluate the overall nitrogen balance in ocean systems. The researchers here will use novel experimental reactors that contain collected marine sediments and, by varying environmental conditions (pH, temperature, oxygen, organic carbon), will discover and quantify what controls rates of DNRA, denitrification, and anammox in sediments. This will provide a direct test and further development of theoretical sedimentary nitrogen models that can be used to predict possible changes in the global nitrogen cycle resulting with various future climate scenarios. Two graduate students will participate in the research and collaborations with the Maine Coastal Observing Alliance (MCOA) and the Gulf of Maine Institute (GOMI), as well as the Institute for Broadening Participation (IBP) will generate minority student involvement and enhanced outreach activity.This project uses thermodynamic calculations and empirical evidence as a basis to evaluate the ratio of available organic carbon (C) to nitrate (NO3-) as a key controlling factor of nitrogen redox partitioning; with higher ratios believed to favor dissimilatory nitrate reduction (DNRA) over N2 production. The investigator's theoretical model predicts rapid and reversible transitions between DNRA and N2 production over relatively small changes in C/NO3-. This suggests that partitioning could be sensitive to seasonal and possibly inter-annual differences in organic C deposition as well as processes that control nitrate flux to the sediments such as water column stratification. Quantitative relationships between sedimentary C/NO3- and nitrogen partitioning remain poorly defined, and a number of other factors including T, H2S, and Fe(II), are known to influence N partitioning. This study will investigate the hypothesis that relationships between nitrogen redox partitioning and C/NO3-, and by extension H2S/NO3-, are predicted by the proposed theoretical sedimentary nitrogen model. Experiments will varying NO3 fluxes while providing hydrogen sulfide (H2S) and 13C-labelled detritus as electron donors, and measure transformation rates of 15NO3- to 15NH4+ and 29/30N2 in thin disc reactors to determine rates and pathways of DNRA and N2 production. The proposed integration of these experiments with a theoretically-based biogeochemical model will develop a quantifiable and testable understanding of the marine nitrogen cycle. This study should provide a major advance that could be broadly applied to quantitatively predict the sedimentary balance between nitrogen retention and loss across marine ecosystems.
海洋沉积物中的微生物过程在全球氮循环中发挥着重要作用。由于溶解在海水中的氮化合物的存在在很大程度上控制了生物生长,因此了解沉积物氮收支如何随着循环、酸度和生物生产力的变化而变化对于预测未来气候情景中的海洋功能至关重要。令人惊讶的是,我们并不清楚沉积物和水柱之间的氮交换是否平衡,如果不平衡,它如何随时间和空间变化。我们确实知道,两种细菌介导的化学反应主要负责通过将生物可用形式的溶解氮转化回通常不能用于生物生产的氮气(N2)来从海洋生态系统中去除氮。这些反应称为反硝化和厌氧氨氧化(anammox);后者仅在氧气为零的情况下运行。该项目将研究第三种反应,称为异化硝酸盐还原(DNRA),它与厌氧氨氧化直接竞争,限制氮气的产生和随之而来的氮“损失”,从而保留氮用于海洋生态系统。 DNRA 的作用尚未得到充分探索,量化该反应可以帮助评估海洋系统中的整体氮平衡。研究人员将使用包含收集的海洋沉积物的新型实验反应器,通过改变环境条件(pH、温度、氧气、有机碳),发现并量化控制沉积物中 DNRA、反硝化和厌氧氨氧化速率的因素。这将为理论沉积氮模型提供直接测试和进一步发展,该模型可用于预测各种未来气候情景导致的全球氮循环可能发生的变化。两名研究生将参与缅因州沿海观测联盟 (MCOA) 和缅因湾研究所 (GOMI) 的研究和合作,以及扩大参与研究所 (IBP) 将促进少数族裔学生的参与并加强外展活动。该项目使用热力学计算和经验证据作为基础来评估可用有机碳 (C) 与硝酸盐的比率 (NO3-)作为氮氧化还原分配的关键控制因素;较高的比率被认为有利于异化硝酸盐还原(DNRA)而不是氮气生产。研究人员的理论模型预测,随着 C/NO3- 相对较小的变化,DNRA 和 N2 生产之间会发生快速且可逆的转变。这表明分配可能对有机碳沉积的季节差异和可能的年际差异以及控制硝酸盐流入沉积物的过程(例如水柱分层)敏感。沉积物 C/NO3- 和氮分配之间的定量关系仍不清楚,并且已知许多其他因素(包括 T、H2S 和 Fe(II))会影响氮分配。本研究将研究氮氧化还原分配与 C/NO3- 以及 H2S/NO3- 之间关系的假设,该关系是通过所提出的理论沉积氮模型预测的。实验将改变 NO3 通量,同时提供硫化氢 (H2S) 和 13C 标记的碎屑作为电子供体,并测量薄盘反应器中 15NO3- 到 15NH4+ 和 29/30N2 的转化率,以确定 DNRA 和 N2 生产的速率和途径。拟议将这些实验与基于理论的生物地球化学模型相结合,将对海洋氮循环形成可量化和可测试的理解。这项研究应提供一项重大进展,可广泛应用于定量预测整个海洋生态系统氮保留和损失之间的沉积平衡。
项目成果
期刊论文数量(2)
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
Similar temperature responses suggest future climate warming will not alter partitioning between denitrification and anammox in temperate marine sediments
- DOI:10.1111/gcb.13370
- 发表时间:2017-01
- 期刊:
- 影响因子:11.6
- 作者:Lindsay D. Brin;A. Giblin;J. J. Rich-J.
- 通讯作者:Lindsay D. Brin;A. Giblin;J. J. Rich-J.
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Anne Giblin其他文献
Integrating Tide‐Driven Wetland Soil Redox and Biogeochemical Interactions Into a Land Surface Model
将潮汐驱动的湿地土壤氧化还原和生物地球化学相互作用整合到陆地表面模型中
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:6.8
- 作者:
B. Sulman;Jiaze Wang;Sophie LaFond‐Hudson;T. O’Meara;F. Yuan;Sergi Molins;Glenn Hammond;I. Forbrich;Zoe G. Cardon;Anne Giblin - 通讯作者:
Anne Giblin
Anne Giblin的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Anne Giblin', 18)}}的其他基金
LTER: Plum Island Ecosystems, the impact of changing landscapes and climate on interconnected coastal ecosystems
LTER:普拉姆岛生态系统,景观和气候变化对相互关联的沿海生态系统的影响
- 批准号:
2224608 - 财政年份:2022
- 资助金额:
$ 37.02万 - 项目类别:
Continuing Grant
Collaborative Research: Quantifying the effects of different nitrogen forms on marsh resilience to environmental change
合作研究:量化不同氮形式对沼泽适应环境变化的能力的影响
- 批准号:
2203323 - 财政年份:2022
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: The Potential Importance of Intracellular Nitrate Cycling in the Nitrogen Cycle in Marine Sediments
合作研究:细胞内硝酸盐循环在海洋沉积物氮循环中的潜在重要性
- 批准号:
2148672 - 财政年份:2022
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Controlled Environment Facilities for the Marine Biological Laboratory
海洋生物实验室受控环境设施
- 批准号:
2128820 - 财政年份:2021
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: TIDE: Legacy effects of long-term nutrient enrichment on recovery of saltmarsh ecosystems
合作研究:潮汐:长期营养富集对盐沼生态系统恢复的遗留影响
- 批准号:
1902695 - 财政年份:2019
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: An Exploration of the Direct and Indirect Effects of Climatic Warming on Arctic Lake Ecosystems
合作研究:探索气候变暖对北极湖泊生态系统的直接和间接影响
- 批准号:
1603214 - 财政年份:2016
- 资助金额:
$ 37.02万 - 项目类别:
Continuing Grant
LTER-Plum Island Ecosystems: Dynamics of coastal ecosystems in a region of rapid climate change, sea-level rise, and human impacts
LTER-普拉姆岛生态系统:气候快速变化、海平面上升和人类影响地区沿海生态系统的动态
- 批准号:
1637630 - 财政年份:2016
- 资助金额:
$ 37.02万 - 项目类别:
Continuing Grant
Coastal SEES Collaborative Research: A cross-site comparison of salt marsh persistence in response to sea-level rise and feedbacks from social adaptations
沿海 SEES 合作研究:盐沼持久性对海平面上升的响应和社会适应反馈的跨地点比较
- 批准号:
1426308 - 财政年份:2015
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
FSML: Research Space for the Marine Biological Laboratory's Marshview Field Station
FSML:海洋生物实验室 Marshview 现场站的研究空间
- 批准号:
1318272 - 财政年份:2013
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
LTER-PIE: Interactions Between External Drivers, Humans and Ecosystems in Shaping Ecological Process in a Mosaic of Coastal Landscapes and Estuarine Seascapes
LTER-PIE:外部驱动因素、人类和生态系统之间的相互作用,塑造沿海景观和河口海景的生态过程
- 批准号:
1238212 - 财政年份:2012
- 资助金额:
$ 37.02万 - 项目类别:
Continuing Grant
相似国自然基金
Research on Quantum Field Theory without a Lagrangian Description
- 批准号:24ZR1403900
- 批准年份:2024
- 资助金额:0.0 万元
- 项目类别:省市级项目
Cell Research
- 批准号:31224802
- 批准年份:2012
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Cell Research
- 批准号:31024804
- 批准年份:2010
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Cell Research (细胞研究)
- 批准号:30824808
- 批准年份:2008
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Research on the Rapid Growth Mechanism of KDP Crystal
- 批准号:10774081
- 批准年份:2007
- 资助金额:45.0 万元
- 项目类别:面上项目
相似海外基金
Collaborative Research: New Approaches to Predicting Long-time Behavior of Polymer Glasses
合作研究:预测聚合物玻璃长期行为的新方法
- 批准号:
2330759 - 财政年份:2024
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
CDS&E/Collaborative Research: Local Gaussian Process Approaches for Predicting Jump Behaviors of Engineering Systems
CDS
- 批准号:
2420358 - 财政年份:2024
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: Prospects and limitations of predicting a potential collapse of the Atlantic meridional overturning circulation
合作研究:预测大西洋经向翻转环流潜在崩溃的前景和局限性
- 批准号:
2343204 - 财政年份:2024
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: Prospects and limitations of predicting a potential collapse of the Atlantic meridional overturning circulation
合作研究:预测大西洋经向翻转环流潜在崩溃的前景和局限性
- 批准号:
2343203 - 财政年份:2024
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: New Approaches to Predicting Long-time Behavior of Polymer Glasses
合作研究:预测聚合物玻璃长期行为的新方法
- 批准号:
2330760 - 财政年份:2024
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: DMREF: Predicting Molecular Interactions to Stabilize Viral Therapies
合作研究:DMREF:预测分子相互作用以稳定病毒疗法
- 批准号:
2325392 - 财政年份:2023
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: EAGER--Evaluation of Optimal Mesonetwork Design for Monitoring and Predicting North American Monsoon (NAM) Convection Using Observing System Simulation
合作研究:EAGER——利用观测系统模拟监测和预测北美季风(NAM)对流的最佳中观网络设计评估
- 批准号:
2308410 - 财政年份:2023
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: RESEARCH-PGR: Predicting Phenotype from Molecular Profiles with Deep Learning: Topological Data Analysis to Address a Grand Challenge in the Plant Sciences
合作研究:RESEARCH-PGR:利用深度学习从分子概况预测表型:拓扑数据分析应对植物科学的重大挑战
- 批准号:
2310356 - 财政年份:2023
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: MODEL ENABLED MACHINE LEARNING (MnML) FOR PREDICTING ECOSYSTEM REGIME SHIFTS
合作研究:用于预测生态系统制度转变的模型机器学习 (MnML)
- 批准号:
2233983 - 财政年份:2023
- 资助金额:
$ 37.02万 - 项目类别:
Standard Grant
Collaborative Research: Predicting Micro to Macro-scale Hot-spot and Hot-moment dynamics in Arctic Tundra Ecosystems
合作研究:预测北极苔原生态系统的微观到宏观热点和热点动态
- 批准号:
2311075 - 财政年份:2023
- 资助金额:
$ 37.02万 - 项目类别:
Continuing Grant