Composition and Bioavailability of Dissolved Organic Nitrogen in Atmospheric Deposition (EGB)
大气沉积 (EGB) 中溶解有机氮的组成和生物利用度
基本信息
- 批准号:9807621
- 负责人:
- 金额:$ 30万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1998
- 资助国家:美国
- 起止时间:1998-09-01 至 2002-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9807621SeitzingerMarked changes in both terrestrial and aquatic ecosystems are occurring as a result of increased anthropogenic nitrogen (N) in atmospheric deposition. N deposition is predicted to increase over twofold in the next 20 years. To date, most studies of the magnitude, sources and effects of atmospherically deposited N have only considered inorganic-N. However, a considerable portion of N in rainwater is in the form of organic-N, and almost nothing is known of the chemical composition, sources or ecosystem effects of the bulk of that organic-N. The proposed studies will: (1) develop to characterize the chemical composition of dissolved organic nitrogen (DOM) in atmospheric deposition; (2) characterize the chemical compositon of DOM in atmospheric deposition at a relatively perturbed site in the Northeastern U.S. over an annual cycle; (3) determine how much of the total DOM in the rainwater in spring is biologically available to coastal plankton communities and provide insight into potential changes in plankton production and community composition; and (4) begin to characterize the chemical composition of the DOM compound classes that are bio-available and thus contributing to ecological changes in receiving ecosystems. The approach will provide a mass balance of total N (organic-N and inorganic-N) and of the various forms of organic N in precipitation. The chemical characterization studies will be integrated with ecological studies. This study will generate information needed to help understand the continental pathways of pollutant and natural N atmospheric compounds in the Northeastern U.S.. Moreover, by linking the bioavailability studies with precipitation N loading and composition, atmospherically processed N compounds will be related to sensitive ecosystems. The project will provide research opportunities for undergraduates to Rutgers University Douglass College. Integration of undergraduate students in this research program will provide the framework for students and researchers to explore together important linkages among human activities/land use, atmospheric geochemical processes, and biogeochemical processes in aquatic ecosystems.9807621SeitzingerMarked changes in both terrestrial and aquatic ecosystems are occurring as a result of increased anthropogenic nitrogen (N) in atmospheric deposition. N deposition is predicted to increase over twofold in the next 20 years. To date, most studies of the magnitude, sources and effects of atmospherically deposited N have only considered inorganic-N. However, a considerable portion of N in rainwater is in the form of organic-N, and almost nothing is known of the chemical composition, sources or ecosystem effects of the bulk of that organic-N. The proposed studies will: (1) develop to characterize the chemical composition of dissolved organic nitrogen (DOM) in atmospheric deposition; (2) characterize the chemical compositon of DOM in atmospheric deposition at a relatively perturbed site in the Northeastern U.S. over an annual cycle; (3) determine how much of the total DOM in the rainwater in spring is biologically available to coastal plankton communities and provide insight into potential changes in plankton production and community composition; and (4) begin to characterize the chemical composition of the DOM compound classes that are bio-available and thus contributing to ecological changes in receiving ecosystems. The approach will provide a mass balance of total N (organic-N and inorganic-N) and of the various forms of organic N in precipitation. The chemical characterization studies will be integrated with ecological studies. This study will generate information needed to help understand the continental pathways of pollutant and natural N atmospheric compounds in the Northeastern U.S.. Moreover, by linking the bioavailability studies with precipitation N loading and composition, atmospherically processed N compounds will be related to sensitive ecosystems. The project will provide research opportunities for undergraduates to Rutgers University Douglass College. Integration of undergraduate students in this research program will provide the framework for students and researchers to explore together important linkages among human activities/land use, atmospheric geochemical processes, and biogeochemical processes in aquatic ecosystems.
9807621 Seitzinger陆地和水生生态系统的显著变化是由于大气沉积中人为氮(N)增加的结果。 据预测,在未来20年内,氮沉降量将增加两倍以上。 迄今为止,大多数关于大气沉积氮的数量、来源和影响的研究都只考虑无机氮。 然而,雨水中相当大一部分的N是以有机N的形式存在的,并且几乎不知道大部分有机N的化学组成、来源或生态系统效应。 拟议的研究将:(1)研究了大气沉降中溶解有机氮(DOM)的化学组成特征:(2)研究了美国东北部一个相对扰动点大气沉降中DOM的化学组成特征;(三)确定春季雨水中有多少总DOM可供沿海浮游生物群落生物利用,并提供潜在变化的见解(4)开始确定具有生物可利用性的DOM化合物类别的化学组成,从而有助于接收生态系统的生态变化。该方法将提供总氮(有机氮和无机氮)和各种形式的有机氮在降水中的质量平衡。 化学特性研究将与生态研究相结合。 这项研究将产生所需的信息,以帮助了解污染物和天然氮大气化合物在美国东北部的大陆途径。此外,通过将生物利用度研究与降水氮负荷和组成相联系,大气处理的氮化合物将与敏感的生态系统相关。该项目将为罗格斯大学道格拉斯学院的本科生提供研究机会。 本科生在本研究计划的整合将为学生和研究人员提供一个框架,共同探索人类活动/土地利用,大气地球化学过程和水生生态系统中的地球化学过程之间的重要联系。9807621 Seitzinger在陆地和水生生态系统的显着变化正在发生的结果增加人为氮(N)在大气沉积。 据预测,在未来20年内,氮沉降量将增加两倍以上。 迄今为止,大多数关于大气沉积氮的数量、来源和影响的研究都只考虑无机氮。 然而,雨水中相当大一部分的N是以有机N的形式存在的,并且几乎不知道大部分有机N的化学组成、来源或生态系统效应。 拟议的研究将:(1)研究了大气沉降中溶解有机氮(DOM)的化学组成特征:(2)研究了美国东北部一个相对扰动点大气沉降中DOM的化学组成特征;(三)确定春季雨水中有多少总DOM可供沿海浮游生物群落生物利用,并提供潜在变化的见解(4)开始确定具有生物可利用性的DOM化合物类别的化学组成,从而有助于接收生态系统的生态变化。该方法将提供总氮(有机氮和无机氮)和各种形式的有机氮在降水中的质量平衡。 化学特性研究将与生态研究相结合。 这项研究将产生所需的信息,以帮助了解污染物和天然氮大气化合物在美国东北部的大陆途径。此外,通过将生物利用度研究与降水氮负荷和组成相联系,大气处理的氮化合物将与敏感的生态系统相关。该项目将为罗格斯大学道格拉斯学院的本科生提供研究机会。 本科生在本研究计划的整合将为学生和研究人员提供一个框架,共同探索人类活动/土地利用,大气地球化学过程和水生生态系统中的地球化学过程之间的重要联系。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
数据更新时间:{{ journalArticles.updateTime }}
{{
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 }}
Sybil Seitzinger其他文献
Escalating Worldwide use of Urea – A Global Change Contributing to Coastal Eutrophication
全球尿素使用量的不断增加——导致沿海富营养化的全球变化
- DOI:
10.1007/s10533-005-3070-5 - 发表时间:
2006-02-01 - 期刊:
- 影响因子:3.700
- 作者:
Patricia M. Glibert;John Harrison;Cynthia Heil;Sybil Seitzinger - 通讯作者:
Sybil Seitzinger
Closing the global N2O budget: nitrous oxide emissions through the agricultural nitrogen cycle
- DOI:
10.1023/a:1009740530221 - 发表时间:
1998-01-01 - 期刊:
- 影响因子:2.700
- 作者:
Arvin Mosier;Carolien Kroeze;Cindy Nevison;Oene Oenema;Sybil Seitzinger;Oswald van Cleemput - 通讯作者:
Oswald van Cleemput
Sybil Seitzinger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('Sybil Seitzinger', 18)}}的其他基金
Coordinating International Global-change Research and Synthesis to Help Guide Society onto a Sustainable Pathway: The International Geosphere-Biosphere Program
协调国际全球变化研究和综合,帮助引导社会走上可持续发展道路:国际地圈-生物圈计划
- 批准号:
1247560 - 财政年份:2012
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
2012 Global Change Open Science Conference: Planet Under Pressure: New Knowledge Towards Solutions
2012 年全球变化开放科学会议:压力下的地球:寻求解决方案的新知识
- 批准号:
1138870 - 财政年份:2011
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
Scientific Integration and Coordination Activities of the International Geosphere-Biosphere Programme
国际地圈-生物圈计划的科学整合与协调活动
- 批准号:
0601754 - 财政年份:2006
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
RCN: Denitrification - Integration Across Landscapes and Waterscapes
RCN:反硝化 - 景观和水景的整合
- 批准号:
0443439 - 财政年份:2005
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
Proposed Africa Network in Earth System Science: a planning workshop
拟议的非洲地球系统科学网络:规划研讨会
- 批准号:
0437363 - 财政年份:2004
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
Past Global Changes (PAGES) International Project Office
过去的全球变化(PAGES)国际项目办公室
- 批准号:
0123150 - 财政年份:2002
- 资助金额:
$ 30万 - 项目类别:
Continuing grant
Scientific Coordination and Integration Activities of the International Geosphere-Biosphere Programme
国际地圈-生物圈计划科学协调与整合活动
- 批准号:
0112185 - 财政年份:2001
- 资助金额:
$ 30万 - 项目类别:
Continuing grant
Denitrification in Coastal Systems: A Comparative Study
沿海系统的反硝化:比较研究
- 批准号:
8315756 - 财政年份:1984
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
相似海外基金
Global variability in dissolved organic matter: implications for metal bioavailability and risk assessment
溶解有机物的全球变化:对金属生物利用度和风险评估的影响
- 批准号:
RGPIN-2015-04414 - 财政年份:2019
- 资助金额:
$ 30万 - 项目类别:
Discovery Grants Program - Individual
Collaborative Research: Dynamics of dissolved organic phosphorus production, composition and bioavailability along a natural marine phosphate gradient
合作研究:沿天然海洋磷酸盐梯度溶解有机磷产生、组成和生物利用度的动态
- 批准号:
1756964 - 财政年份:2018
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
Collaborative Research: Dynamics of dissolved organic phosphorus production, composition and bioavailability along a natural marine phosphate gradient
合作研究:沿天然海洋磷酸盐梯度溶解有机磷产生、组成和生物利用度的动态
- 批准号:
1756337 - 财政年份:2018
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
Global variability in dissolved organic matter: implications for metal bioavailability and risk assessment
溶解有机物的全球变化:对金属生物利用度和风险评估的影响
- 批准号:
RGPIN-2015-04414 - 财政年份:2018
- 资助金额:
$ 30万 - 项目类别:
Discovery Grants Program - Individual
Assessing Dissolved Organic Matter Structural Properties to Unravel Mercury Bioavailability
评估溶解有机物的结构特性以揭示汞的生物利用度
- 批准号:
503686-2017 - 财政年份:2018
- 资助金额:
$ 30万 - 项目类别:
Postgraduate Scholarships - Doctoral
Assessing Dissolved Organic Matter Structural Properties to Unravel Mercury Bioavailability
评估溶解有机物的结构特性以揭示汞的生物利用度
- 批准号:
503686-2017 - 财政年份:2017
- 资助金额:
$ 30万 - 项目类别:
Postgraduate Scholarships - Doctoral
Global variability in dissolved organic matter: implications for metal bioavailability and risk assessment
溶解有机物的全球变化:对金属生物利用度和风险评估的影响
- 批准号:
RGPIN-2015-04414 - 财政年份:2017
- 资助金额:
$ 30万 - 项目类别:
Discovery Grants Program - Individual
Global variability in dissolved organic matter: implications for metal bioavailability and risk assessment
溶解有机物的全球变化:对金属生物利用度和风险评估的影响
- 批准号:
RGPIN-2015-04414 - 财政年份:2016
- 资助金额:
$ 30万 - 项目类别:
Discovery Grants Program - Individual
Global variability in dissolved organic matter: implications for metal bioavailability and risk assessment
溶解有机物的全球变化:对金属生物利用度和风险评估的影响
- 批准号:
RGPIN-2015-04414 - 财政年份:2015
- 资助金额:
$ 30万 - 项目类别:
Discovery Grants Program - Individual
Tracking the temporal and spatial variability of dissolved organic matter, its diagenetic state and bioavailability during various bloom states in the North Atlantic
跟踪北大西洋各种水华状态期间溶解有机物的时间和空间变化、其成岩状态和生物利用度
- 批准号:
1537943 - 财政年份:2015
- 资助金额:
$ 30万 - 项目类别:
Standard Grant