Biogeochemical Consequences of Metal Partitioning in Phytoplankton
浮游植物中金属分配的生物地球化学后果
基本信息
- 批准号:9617675
- 负责人:
- 金额:$ 21.64万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-03-01 至 2000-02-29
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9617675 Fisher The biogeochemical cycling of many trace elements in ocean surface waters is strongly influenced by biological process. Despite this fact, relatively little is known about what controls the fate of elements once they are incorporated into biomass. For example, metals can be assimilated into the food web, or regenerated to the dissolved phase or exported on sinking particles. Given our lack of understanding in this area, it is difficult at present to predict the fate and relative importance of different pathways in metal cycling throughout the wide range of oceanic settings. The principal investigators propose here to advance our understanding of trace metal cycling by quantifying for the first time the effects of subcellular partitioning and metal stoichiometires on metal biogeochemistry in natural systems. There are two main approaches, consisting of laboratory and field work. The lab studies use controlled measurements and labeled metal radionuclides to examine carbon:metal ratios and the partitioning and the fate of metals incorporated into biomass. A novel dual labeling technique allows the principle investigators to separate between intercellular and cell surface pools of metals. In the field, natural assemblages of phytoplankton will be examined for the cellular partitioning of the various metals, and ship board incubation experiments will be conducted to examine the rates of metal turnover. The results of this study will significantly increase our understanding of the role of biological processes in chemical cycling and transport in the oceans.
小行星9617675 海洋表层沃茨中多种微量元素的地球化学循环受生物过程的强烈影响。 尽管如此,人们对元素一旦被纳入生物质中,是什么控制它们的命运知之甚少。 例如,金属可以被吸收到食物网中,或再生为溶解相或在下沉颗粒上输出。 由于我们对这一领域缺乏了解,目前很难预测在各种海洋环境中金属循环的不同途径的命运和相对重要性。 主要研究人员在这里提出,通过首次量化亚细胞分配和金属化学计量对自然系统中金属地球化学的影响,来促进我们对痕量金属循环的理解。 有两种主要的方法,包括实验室和实地工作。 实验室研究使用受控测量和标记的金属放射性核素来检查碳:金属比率以及掺入生物质的金属的分配和命运。 一种新的双标记技术允许主要研究人员分离细胞间和细胞表面的金属池。 在实地,将对浮游植物的自然组合进行检查,以确定各种金属的细胞分配,并将进行船上培养实验,以检查金属周转率。 这项研究的结果将大大增加我们对生物过程在海洋化学循环和运输中的作用的了解。
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)
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Nicholas Fisher其他文献
Poor Actual Availability of Publicly Accessible Automated External Defibrillators Limit Their Value in the Treatment of Out-of-Hospital Cardiac Arrest
- DOI:
10.1016/j.hlc.2017.05.023 - 发表时间:
2017-01-01 - 期刊:
- 影响因子:
- 作者:
Thalib Mowjood;Daniel Garofalo;Kris Gagliardi;Nicholas Fisher;Tammy Pegg - 通讯作者:
Tammy Pegg
The influence of green tea, caffeine, conjugated linoleic acid and branched chain amino acids on body composition and abdominal fat in overweight and obese individuals
- DOI:
10.1186/1550-2783-10-s1-p19 - 发表时间:
2013-12-06 - 期刊:
- 影响因子:3.900
- 作者:
Michael J Ormsbee;Shweta R Rawal;Amber W Kinsey;Takudzwa A Madzima;D David Thomas;Nicholas Fisher;Marcus E Elam;Maria T Spicer - 通讯作者:
Maria T Spicer
A novel drug for uncomplicated malaria: targeted high throughput screening (HTS) against the type II NADH:ubiquinone oxidoreductase (PfNdh2) of Plasmodium falciparum
- DOI:
10.1186/1475-2875-9-s2-i14 - 发表时间:
2010-10-20 - 期刊:
- 影响因子:3.000
- 作者:
Steve A Ward;Nicholas Fisher;Alasdair Hill;Alison Mbekeani;Alison Shone;Gemma Nixon;Paul Stocks;Peter Gibbons;Richard Amewu;David W Hong;Victoria Barton;Chandra Pidathala;James Chadwick;Louise Le Pensee;Ashley Warman;Raman Sharma;Neil G Berry;Paul M O'Neill;Giancarlo A Biagini - 通讯作者:
Giancarlo A Biagini
S4.24 Modelling, cloning and expression of the <em>P. falciparum</em> NADH dehydrogenase
- DOI:
10.1016/j.bbabio.2008.05.155 - 发表时间:
2008-07-19 - 期刊:
- 影响因子:
- 作者:
Nicholas Fisher;Stephen A. Ward;Giancarlo A. Biagini - 通讯作者:
Giancarlo A. Biagini
Education and Employment
教育与就业
- DOI:
10.4135/9781412950664.n155 - 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
Nicholas Fisher - 通讯作者:
Nicholas Fisher
Nicholas Fisher的其他文献
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{{ truncateString('Nicholas Fisher', 18)}}的其他基金
Collaborative research: Transformations and mercury isotopic fractionation of methylmercury by marine phytoplankton
合作研究:海洋浮游植物对甲基汞的转化和汞同位素分馏
- 批准号:
1634024 - 财政年份:2016
- 资助金额:
$ 21.64万 - 项目类别:
Standard Grant
Collaborative Research: Methylmercury Interactions with Marine Plankton
合作研究:甲基汞与海洋浮游生物的相互作用
- 批准号:
1260345 - 财政年份:2013
- 资助金额:
$ 21.64万 - 项目类别:
Continuing Grant
Collaborative Research: Determining the Elemental Composition of Natural Plankton Cells in the Eastern Equatorial Pacific using Synchrotron X-Ray Fluorescence Microscopy
合作研究:使用同步加速器 X 射线荧光显微镜测定东赤道太平洋天然浮游生物细胞的元素组成
- 批准号:
0527059 - 财政年份:2005
- 资助金额:
$ 21.64万 - 项目类别:
Standard Grant
A Comparison of Metal Accumulation in Arctic and Temperate Marine Organisms
北极和温带海洋生物金属积累的比较
- 批准号:
9986069 - 财政年份:2000
- 资助金额:
$ 21.64万 - 项目类别:
Continuing Grant
Collaborative Research: The Chemical Speciation of Dissolved and Particulate Selenium in an Estuary: Effects on Trophic Transfer and Biogeochemical Cycling
合作研究:河口溶解硒和颗粒硒的化学形态:对营养转移和生物地球化学循环的影响
- 批准号:
9714308 - 财政年份:1997
- 资助金额:
$ 21.64万 - 项目类别:
Standard Grant
Fate of Metals Associated with Marine Biogenic Debris
与海洋生物碎片相关的金属的命运
- 批准号:
8810657 - 财政年份:1988
- 资助金额:
$ 21.64万 - 项目类别:
Continuing Grant
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