NSFGEO-NERC: Collaborative Research: Novel imaging, physiology and numerical approaches for understanding biologically mediated, unsteady sinking in marine diatoms
NSFGEO-NERC:合作研究:用于了解海洋硅藻生物介导的不稳定下沉的新颖成像、生理学和数值方法
基本信息
- 批准号:2023442
- 负责人:
- 金额:$ 47.28万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-04-01 至 2025-03-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
This is a project that is jointly funded by the National Science Foundation's Directorate of Geosciences (NSF/GEO) and the National Environment Research Council (UKRI/NERC) of the United Kingdom (UK) via the NSF/GEO-NERC Lead Agency Agreement. This Agreement allows a single joint US/UK proposal to be submitted and peer-reviewed by the Agency whose investigator has the largest proportion of the budget. Upon successful joint determination of an award, each Agency funds the proportion of the budget and the investigators associated with its own investigators and component of the work.This project takes a small-scale approach to look at individual cells to investigate the sinking of marine diatoms, which on larger scales has implications for how food for larger organisms, carbon, and organic particles move throughout the ocean. Diatoms are a type of phytoplankton, cells that use photosynthesis in surface waters to produce roughly half of the world’s oxygen and the food to support ocean food webs. They have a heavy, glass-like outer wall which causes them to sink and move up to 40% of particulate organic carbon from the ocean’s surface to the deep sea. The investigators are using novel methods to determine how diatoms regulate their sinking quickly in response to different environmental conditions. These include state-of-the-art video measurements of individual cells, a micoelectrode approach to understand changes at cell surfaces, and microscopy to see changes inside and at the surface of cells. The resulting information will be used to build a model to understand how and why diatoms use unsteady sinking behavior based on their environment. The project supports early career investigators, provides training for a postdoctoral scientist and undergraduate students, and develops a collaboration between US and UK scientists. The team is also developing lesson plans in conjunction with local high schools with high populations of underrepresented students in STEM fields. The problem of sinking and suspension of diatoms has received considerable attention because of its ecological, evolutionary and biogeochemical significance, yet understanding of the processes that regulate sinking rates remains rudimentary. The investigators have used new techniques to make preliminary observations showing that some species of diatom exhibit an unsteady sinking behavior that consists of rapid changes of buoyancy on time scales of seconds. However, it remains unclear how widely this behavior matters across species and ocean conditions. In this study, the team of investigators is using state-of-the-art video-based measurements of sinking rates of individual cells to assess the prevalence of unsteady sinking among centric and pennate diatoms of varying cell sizes and quantify how this behavior changes in response to sharp gradients in nutrients and light. The project leverages an interdisciplinary, international collaboration to combine innovative optical techniques, advanced tools to assess cell physiology, and numerical modeling approaches to characterize suspension properties for individual diatom cells. Results are likely to transform the way we think about the ecology of diatoms, their strategies for nutrient acquisition, and mechanisms to control their buoyancy, in particular the modulation of volume and membrane of the central vacuole. This project contributes to the development of novel tools for single cell physiological studies, most notably direct measurement of diffusive boundary layers around cells under varying flow conditions and numerical modeling of cell-level processes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
该项目由美国国家科学基金会地球科学理事会 (NSF/GEO) 和英国国家环境研究理事会 (UKRI/NERC) 通过 NSF/GEO-NERC 牵头机构协议共同资助。该协议允许美国/英国联合提案由其研究人员拥有最大预算比例的机构提交并进行同行评审。在成功联合确定资助后,每个机构将资助该比例的预算和相关研究人员。有自己的调查员该项目采用小规模方法观察单个细胞,以研究海洋硅藻的下沉,这在更大范围内对较大生物体的食物、碳和有机颗粒如何在海洋中移动产生影响。硅藻是浮游植物的一种,它们利用地表水中的光合作用产生世界上大约一半的氧气和维持海洋食物网的食物,它们有一层厚重的玻璃状外壁,这使得它们下沉并向上移动。研究人员正在使用新方法来确定硅藻如何根据不同的环境条件快速调节其下沉,其中包括对单个细胞进行最先进的视频测量。 ,一种了解细胞表面变化的微电极方法,以及观察细胞内部和表面变化的显微镜方法。所得信息将用于构建模型,以了解硅藻如何以及为何使用基于不稳定的下沉行为。该项目支持早期职业研究人员,为博士后科学家和本科生提供培训,并在美国和英国科学家之间开展合作,该团队还与当地学生人数较多的高中一起制定课程计划。硅藻的下沉和悬浮问题因其生态、进化和生物地球化学意义而受到广泛关注,但研究人员使用新技术进行的初步观察表明,对调节下沉速率的过程的了解仍然很初级。一些硅藻物种表现出不稳定的下沉行为,包括在秒的时间尺度上浮力的快速变化。然而,目前尚不清楚这种行为在物种和海洋条件下的影响范围有多大。 -基于视频的单个细胞下沉速率测量,以评估不同细胞大小的中心硅藻和羽状硅藻之间不稳定下沉的普遍性,并量化这种行为如何响应营养物和光照的急剧梯度而变化。利用跨学科的国际合作,将创新的光学技术、评估细胞生理学的先进工具以及表征单个硅藻细胞悬浮特性的数值建模方法结合起来,结果可能会改变我们对硅藻生态及其策略的思考方式。营养物获取和控制其浮力的机制,特别是中央液泡的体积和膜的调节该项目有助于开发用于单细胞生理学研究的新工具,尤其是细胞周围扩散边界层的直接测量。该奖项反映了 NSF 的法定使命,并通过使用基金会的智力优点和更广泛的影响审查标准进行评估,被认为值得支持。
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)
Diatoms rapidly alter sinking behavior in response to changing nutrient concentrations
硅藻响应营养物浓度的变化而迅速改变下沉行为
- DOI:10.1002/lno.11649
- 发表时间:2020-11
- 期刊:
- 影响因子:4.5
- 作者:Du Clos, Kevin T.;Karp‐Boss, Lee;Gemmell, Brad J.
- 通讯作者:Gemmell, Brad J.
Does the settling column method underestimate phytoplankton sinking speeds?
沉降柱方法是否低估了浮游植物的下沉速度?
- DOI:10.1098/rsos.231455
- 发表时间:2024-02
- 期刊:
- 影响因子:3.5
- 作者:Du Clos, Kevin T.;Gemmell, Brad J.
- 通讯作者:Gemmell, Brad 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 }}
Brad Gemmell其他文献
Brad Gemmell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('Brad Gemmell', 18)}}的其他基金
RUI: Collaborative Research: Optimized design principles inspired by compliant natural propulsors
RUI:协作研究:受顺应自然推进器启发的优化设计原则
- 批准号:
2100703 - 财政年份:2021
- 资助金额:
$ 47.28万 - 项目类别:
Standard Grant
Collaborative Research: Quantifying the trophic roles of epipelagic ctenophores
合作研究:量化上层栉水母的营养作用
- 批准号:
1829945 - 财政年份:2018
- 资助金额:
$ 47.28万 - 项目类别:
Standard Grant
Collaborative Research: IDBR: Type A: Diver-Operated Imaging Platform with Complementary Systems for Quantifying Aquatic Organism Interactions
合作研究:IDBR:A 型:潜水员操作的成像平台,具有用于量化水生生物相互作用的补充系统
- 批准号:
1455471 - 财政年份:2015
- 资助金额:
$ 47.28万 - 项目类别:
Continuing Grant
UNS: Collaborative Research: Fluid mechanical basis of universal natural propulsor bending patterns
UNS:合作研究:通用自然推进器弯曲模式的流体力学基础
- 批准号:
1511996 - 财政年份:2015
- 资助金额:
$ 47.28万 - 项目类别:
Standard Grant
Collaborative Research: IDBR: Type A: Diver-Operated Imaging Platform with Complementary Systems for Quantifying Aquatic Organism Interactions
合作研究:IDBR:A 型:潜水员操作的成像平台,具有用于量化水生生物相互作用的补充系统
- 批准号:
1560991 - 财政年份:2015
- 资助金额:
$ 47.28万 - 项目类别:
Continuing Grant
相似国自然基金
战略研究类:国家自然科学基金委员会地球科学部发展史
- 批准号:
- 批准年份:2022
- 资助金额:63 万元
- 项目类别:
国家自然科学基金委员会监督管理制度研究
- 批准号:
- 批准年份:2019
- 资助金额:20 万元
- 项目类别:专项基金项目
国家自然科学基金委员会计算机网络与信息安全“十四五”发展规划研究
- 批准号:
- 批准年份:2019
- 资助金额:16 万元
- 项目类别:专项基金项目
国家自然科学基金委员会十四五信息化规划战略研究
- 批准号:J1924032
- 批准年份:2019
- 资助金额:30 万元
- 项目类别:专项基金项目
国家自然科学基金委员会信息公开制度研究
- 批准号:
- 批准年份:2019
- 资助金额:20 万元
- 项目类别:专项基金项目
相似海外基金
Collaborative Research: NSFGEO/NERC: After the cataclysm: cryptic degassing and delayed recovery in the wake of Large Igneous Province volcanism
合作研究:NSFGEO/NERC:灾难之后:大型火成岩省火山活动后的神秘脱气和延迟恢复
- 批准号:
2317937 - 财政年份:2024
- 资助金额:
$ 47.28万 - 项目类别:
Continuing Grant
Collaborative Research: NSFGEO/NERC: After the cataclysm: cryptic degassing and delayed recovery in the wake of Large Igneous Province volcanism
合作研究:NSFGEO/NERC:灾难之后:大型火成岩省火山活动后的神秘脱气和延迟恢复
- 批准号:
2317938 - 财政年份:2024
- 资助金额:
$ 47.28万 - 项目类别:
Continuing Grant
NSFGEO-NERC: Collaborative Research: Exploring AMOC controls on the North Atlantic carbon sink using novel inverse and data-constrained models (EXPLANATIONS)
NSFGEO-NERC:合作研究:使用新颖的逆向模型和数据约束模型探索 AMOC 对北大西洋碳汇的控制(解释)
- 批准号:
2347992 - 财政年份:2024
- 资助金额:
$ 47.28万 - 项目类别:
Standard Grant
Collaborative Research: NSFGEO-NERC: Using population genetic models to resolve and predict dispersal kernels of marine larvae
合作研究:NSFGEO-NERC:利用群体遗传模型解析和预测海洋幼虫的扩散内核
- 批准号:
2334797 - 财政年份:2024
- 资助金额:
$ 47.28万 - 项目类别:
Standard Grant
Collaborative Research: NSFGEO/NERC: After the cataclysm: cryptic degassing and delayed recovery in the wake of Large Igneous Province volcanism
合作研究:NSFGEO/NERC:灾难之后:大型火成岩省火山活动后的神秘脱气和延迟恢复
- 批准号:
2317936 - 财政年份:2024
- 资助金额:
$ 47.28万 - 项目类别:
Continuing Grant