Role of Microbial Sulfur Oxidation in Nitrogen Removal by Wetlands and Streams

微生物硫氧化在湿地和溪流脱氮中的作用

基本信息

  • 批准号:
    0516076
  • 负责人:
  • 金额:
    $ 38.32万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2005
  • 资助国家:
    美国
  • 起止时间:
    2005-10-01 至 2010-09-30
  • 项目状态:
    已结题

项目摘要

Abstract0516076 Role of microbial sulfur oxidation in nitrogen removal by wetlands and streams (S.K. Hamilton)Excessive nitrogen (N) entering streams, often originating as nitrate from agricultural or urban areas, creates problems with water-quality and is a growing concern. Surface and groundwater flow through landscapes often passes through wetlands and headwater streams, where nitrate removal is typically observed. Further removal may occur in downstream impoundments and floodplains. The research proposed here was inspired by previous studies that showed that nitrate removal from freshwater sediments in Michigan coincided with sulfate production. Pilot research indicates that this is a biological process that could occur via sulfur (S) oxidation by bacteria that utilize nitrate as an oxidant in place of oxygen. The overarching hypothesis under investigation is that nitrate reduction linked to S oxidation is an important process in many freshwater sediments. Such sediments are not unusually high in S, which like nitrate has natural sources, but also is a ubiquitous pollutant. The importance of nitrate reduction by S oxidizers will be investigated across diverse wetlands, streams, and riverine reservoirs and floodplains in southwestern Michigan, and in headwater streams at several U.S. locations that are study sites for the Lotic Intersite N Experiment (LINX). The removal of N by wetlands and streams is of particular interest in agricultural landscapes because N export by rivers to coastal waters has been implicated in creating hypoxic zones (e.g., the Gulf of Mexico) and harmful algal blooms. Wetland and stream restoration for the purpose of N management should consider the possible linkage between microbial S and N transformations, which bears on the controls of N removal rates and the eventual fate of the N that is removed. Graduate student training is integral to this research, and the results will contribute to outreach and teaching activities.
微生物硫氧化在湿地和溪流脱氮中的作用(S.K.汉密尔顿)过量的氮(N)进入河流,通常来自农业或城市地区的硝酸盐,造成水质问题,并日益受到关注。地表水和地下水流经景观通常会经过湿地和源头溪流,在那里通常会观察到硝酸盐的去除。下游蓄水池和洪泛区可能会进一步清除。 这里提出的研究受到了以前研究的启发,这些研究表明密歇根州淡水沉积物中硝酸盐的去除与硫酸盐的产生相一致。初步研究表明,这是一个生物过程,可能通过细菌利用硝酸盐代替氧气作为氧化剂氧化硫(S)而发生。目前正在调查的总体假设是,硝酸盐还原与S氧化是一个重要的过程,在许多淡水沉积物。这些沉积物中的硫含量并不高,硫和硝酸盐一样有天然来源,但也是一种普遍存在的污染物。 硝酸盐还原S氧化剂的重要性将在不同的湿地,溪流,河流水库和漫滩在密歇根州西南部,并在源头流在美国的几个位置是研究地点的Lotic Intersite N实验(LINX)。湿地和溪流对氮的去除在农业景观中特别令人感兴趣,因为河流向沿海沃茨的氮输出与创造缺氧区(例如,墨西哥湾)和有害藻华。 湿地和流恢复N管理的目的,应考虑微生物的S和N的转换,这对N的去除率的控制和最终的命运,被删除的N之间的可能联系。研究生培训是本研究不可或缺的一部分,其结果将有助于推广和教学活动。

项目成果

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Stephen Hamilton其他文献

Selection of <em>Pichia pastoris</em> strains expressing recombinant immunoglobulin G by cell surface labeling
  • DOI:
    10.1016/j.jim.2010.03.007
  • 发表时间:
    2010-06-30
  • 期刊:
  • 影响因子:
  • 作者:
    Song Lin;Zheng Shen;Dongxing Zha;Nathan Sharkey;Bianka Prinz;Stephen Hamilton;Tej Venkatachalam Pavoor;Beata Bobrowicz;Seemab S. Shaikh;Alissa M. Rittenhour;Thomas I. Potgieter;Piotr Bobrowicz;Terrance A. Stadheim
  • 通讯作者:
    Terrance A. Stadheim
A survey of job satisfaction, sources of stress and psychological symptoms among New Zealand health professionals.
对新西兰卫生专业人员的工作满意度、压力来源和心理症状的调查。
  • DOI:
  • 发表时间:
    2001
  • 期刊:
  • 影响因子:
    0
  • 作者:
    A. Dowell;Travis Westcott;D. Mcleod;Stephen Hamilton
  • 通讯作者:
    Stephen Hamilton
Establishing an equipoise: Does the use of acellular dermal matrices in pre-pectoral implant-based breast reconstruction improve outcomes?
  • DOI:
    10.1016/j.bjps.2024.09.041
  • 发表时间:
    2024-12-01
  • 期刊:
  • 影响因子:
  • 作者:
    Hannah Cook;David Zargaran;Sevasti Panagiota Glynou;Alexander Zargaran;Mo Akhavani;Norman Williams;Stephen Hamilton;Afshin Mosahebi;Lorna Cook;Alison Waterworth;Mina Youssef;Kaustuv Das;Chandeena Roshanlall;Jaroslaw Krupa;Abdul Kasem;Julia Massey;Louise Merker;Huma Irshad;Sally Ng;Giorgio Desantis
  • 通讯作者:
    Giorgio Desantis
Spatial Procurement of Farm Products and the Supply of Processed Foods: Application to the Tomato Processing Industry
  • DOI:
    10.1007/s11151-023-09939-5
  • 发表时间:
    2024-01-13
  • 期刊:
  • 影响因子:
    0.700
  • 作者:
    Stephen Hamilton;Scott Kjorlien;Ethan Ligon;Aric Shafran
  • 通讯作者:
    Aric Shafran
Acute tubulointerstitial nephritis: phenotype of infiltrating cells and prognostic impact of tubulitis
急性肾小管间质性肾炎:浸润细胞的表型和肾小管炎的预后影响
  • DOI:
  • 发表时间:
    1996
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    B. Iványi;Stephen Hamilton;Hans Erik Hansen;Steen Olsen
  • 通讯作者:
    Steen Olsen

Stephen Hamilton的其他文献

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{{ truncateString('Stephen Hamilton', 18)}}的其他基金

LTER: The Ecology of Row Crop Ecosystems and Landscapes at the KBS LTER Site
LTER:KBS LTER 站点的中耕作物生态系统和景观的生态学
  • 批准号:
    1637653
  • 财政年份:
    2016
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Continuing Grant
DISSERTATION RESEARCH: Hydrological controls of riverine ecosystems of the Napo River (Amazon Basin): Implications for the management and conservation of biodiversity
论文研究:纳波河(亚马逊流域)河流生态系统的水文控制:对生物多样性管理和保护的影响
  • 批准号:
    1011297
  • 财政年份:
    2010
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Standard Grant
Dissertation Research: Phosphorus Cycling in Shallow Freshwater Ecosystems
论文研究:浅层淡水生态系统中的磷循环
  • 批准号:
    0910008
  • 财政年份:
    2009
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Standard Grant
Water Level Fluctuations and Internal Eutrophication in Lakes and Wetlands
湖泊和湿地的水位波动和内部富营养化
  • 批准号:
    0743402
  • 财政年份:
    2008
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Continuing Grant
DISSERTATION RESEARCH: Importance of Novel Microbial Pathways of Nitrate Uptake by Freshwater Sediments
论文研究:淡水沉积物吸收硝酸盐的新型微生物途径的重要性
  • 批准号:
    0508704
  • 财政年份:
    2005
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Standard Grant
Collaborative Research: Adaptation of daphniids to digestion resistant resources
合作研究:水蚤对抗消化资源的适应
  • 批准号:
    0235118
  • 财政年份:
    2003
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Standard Grant
Dissertation Research: Anaerobic Mirobial Metabolism and the Biogeochemical Functioning of Wetlands
论文研究:厌氧微生物代谢和湿地的生物地球化学功能
  • 批准号:
    0072980
  • 财政年份:
    2000
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Standard Grant
CAREER: Hydrologic Regulation of Wetland Biogeochemistry and Ecology and the Impacts of Climate Change
职业:湿地生物地球化学和生态的水文调控以及气候变化的影响
  • 批准号:
    9701714
  • 财政年份:
    1997
  • 资助金额:
    $ 38.32万
  • 项目类别:
    Continuing Grant

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水热炭的微生物陈化(Microbial-aged Hydrochar)及其对稻田氨挥发的影响机制
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