Collaborative Research: Orientation of elongate diatoms as a strategy for light harvesting

合作研究:细长硅藻的方向作为光收集的策略

基本信息

  • 批准号:
    1657332
  • 负责人:
  • 金额:
    $ 28.91万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2017
  • 资助国家:
    美国
  • 起止时间:
    2017-04-01 至 2021-03-31
  • 项目状态:
    已结题

项目摘要

Phytoplankton have an intimate connection to the hydrodynamic environment in which they live.Previous studies have examined the role that turbulence and shear play in nutrient uptake, patch/layer formation, and predator-prey encounters, but the role of phytoplankton orientation to increase light capture (and ultimately primary production) has been largely overlooked. Compelling evidence of persistent horizontal orientation of chain-forming diatoms, obtained from novel in situ holographic imaging, has led to a hypothesis that in regions of strong stratification, shear flows will lead to systematic horizontal orientation of elongate phytoplankton forms that maximizes their cross-sectional area (and light capture) in the ambient downwelling light field. It has also been suggested that variations in phytoplankton size and shape are fundamental traits conferring selective competitive advantages in certain hydrodynamic environments, thus modifying/mediating community composition. The interdisciplinary research of this project crosses three scientific disciplines (biology, optics and fluid dynamics) and will advance our understanding of the function of diverse forms of phytoplankton, their interactions with fluid flows, and the resultant impacts on the optics of the environment. The project will support a number of undergraduate and graduate students, and post-doctoral researchers. This project combines analysis of previously collected field data with laboratory experiments and modeling. For the field data analysis, phytoplankton orientation is quantified from in situ holographic images of the undisturbed water column along with concurrent high resolution measurements of critical physical (turbulence/shear/stratification) and optical parameters collected from a ship-based holographic bio-physics profiler. In the laboratory, the orientation response of different phytoplankton species and morphologies is evaluated in custom built shear tanks under controlled laminar and turbulent conditions to confirm that elongate forms can orient in certain hydrodynamic environments to maximize light capture. In addition, controlled growth/physiology experiments in various shear tank treatments will explore the effects of orientation on growth, photosynthetic parameters and productivity. Lastly, the project results will be incorporated into a global analysis of observed and modeled physical, bio-optical and ecologically-relevant parameters, to quantify the relevance of this phenomenon to primary production and the carbon cycle.
浮游植物与其生活的水动力环境有着密切的联系。之前的研究已经研究了湍流和剪切力在养分吸收、斑块/层形成和捕食者与猎物相遇中所起的作用,但浮游植物定向对增加光捕获(以及最终初级生产)的作用在很大程度上被忽视了。从新颖的原位全息成像中获得的链形成硅藻持续水平方向的令人信服的证据导致了一个假设,即在强烈分层的区域中,剪切流将导致细长浮游植物形式的系统水平方向,从而最大化其在环境下流光场中的横截面积(和光捕获)。也有人提出,浮游植物大小和形状的变化是在某些水动力环境中赋予选择性竞争优势的基本特征,从而改变/调节群落组成。该项目的跨学科研究跨越三个科学学科(生物学、光学和流体动力学),将增进我们对不同形式浮游植物的功能、它们与流体流动的相互作用以及由此对环境光学产生的影响的理解。该项目将支持一批本科生、研究生以及博士后研究人员。该项目将对先前收集的现场数据的分析与实验室实验和建模相结合。对于现场数据分析,浮游植物的方向是根据未受干扰的水柱的原位全息图像以及从船基全息生物物理剖面仪收集的关键物理(湍流/剪切/分层)和光学参数的并发高分辨率测量来量化的。在实验室中,在受控层流和湍流条件下,在定制的剪切池中评估不同浮游植物种类和形态的定向响应,以确认细长形式可以在某些水动力环境中定向,以最大限度地捕获光。此外,各种剪切罐处理中的受控生长/生理学实验将探讨方向对生长、光合参数和生产力的影响。最后,该项目的结果将被纳入对观测和建模的物理、生物光学和生态相关参数的全球分析中,以量化这种现象与初级生产和碳循环的相关性。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Enhanced Light Absorption by Horizontally Oriented Diatom Colonies
水平定向硅藻菌落增强光吸收
  • DOI:
    10.3389/fmars.2020.00494
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    McFarland, Malcolm;Nayak, Aditya R.;Stockley, Nicole;Twardowski, Michael;Sullivan, James
  • 通讯作者:
    Sullivan, James
High-Resolution Sampling of a Broad Marine Life Size Spectrum Reveals Differing Size- and Composition-Based Associations With Physical Oceanographic Structure
  • DOI:
    10.3389/fmars.2020.542701
  • 发表时间:
    2020-12-22
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Greer, Adam T.;Lehrter, John C.;Penta, Bradley
  • 通讯作者:
    Penta, Bradley
Editorial: Small Scale Spatial and Temporal Patterns in Particles, Plankton, and Other Organisms
社论:颗粒、浮游生物和其他生物的小规模时空模式
  • DOI:
    10.3389/fmars.2021.669530
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Nayak, Aditya R.;Jiang, Houshuo;Byron, Margaret L.;Sullivan, James M.;McFarland, Malcolm N.;Murphy, David W.
  • 通讯作者:
    Murphy, David W.
Automated plankton classification from holographic imagery with deep convolutional neural networks
  • DOI:
    10.1002/lom3.10402
  • 发表时间:
    2020-12-03
  • 期刊:
  • 影响因子:
    2.7
  • 作者:
    Guo, Buyu;Nyman, Lisa;Hong, Jiarong
  • 通讯作者:
    Hong, Jiarong
“Breaking” news for the ocean's carbon budget
有关海洋碳预算的“重大新闻”
  • DOI:
    10.1126/science.aba7109
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    56.9
  • 作者:
    Nayak, Aditya R.;Twardowski, Michael S.
  • 通讯作者:
    Twardowski, Michael S.
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James Sullivan其他文献

The effect of powder recycling on the mechanical performance of laser powder bed fused stainless steel 316L
粉末回收对激光粉床熔融不锈钢316L力学性能的影响
  • DOI:
    10.1016/j.addma.2024.104245
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    11
  • 作者:
    R. Douglas;Nicholas Barnard;Nicholas Lavery;James Sullivan;Thomas Jones;R.J. Lancaster
  • 通讯作者:
    R.J. Lancaster
Plasticity of neuronal receptors
神经元受体的可塑性
  • DOI:
  • 发表时间:
    1989
  • 期刊:
  • 影响因子:
    0
  • 作者:
    W. Klein;James Sullivan;A. Skorupa;J. Aguilar
  • 通讯作者:
    J. Aguilar
The implications of long-distance tour attributes for national travel data collection in the United States
  • DOI:
    10.1007/s11116-016-9754-y
  • 发表时间:
    2016-12-26
  • 期刊:
  • 影响因子:
    3.300
  • 作者:
    Lisa Aultman-Hall;Chester Harvey;James Sullivan;Jeffrey J. LaMondia
  • 通讯作者:
    Jeffrey J. LaMondia
Inhaled delivery of a lipid nanoparticle encapsulated messenger RNA encoding a ciliary protein for the treatment of primary ciliary dyskinesia.
吸入编码纤毛蛋白的脂质纳米颗粒封装的信使 RNA,用于治疗原发性纤毛运动障碍。
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    C. Woo;A. Allawzi;N. Clark;N. Kaushal;Tim C. Efthymiou;M. Thamsen;J. Ngyuen;R. Wooster;James Sullivan
  • 通讯作者:
    James Sullivan
emPseudo-nitzschia/em species, toxicity, and dynamics in the southern Indian River Lagoon, FL
弗罗里达州南部印第安河泻湖中的拟菱形藻属物种、毒性和动态
  • DOI:
    10.1016/j.hal.2023.102437
  • 发表时间:
    2023-07-01
  • 期刊:
  • 影响因子:
    4.500
  • 作者:
    Stephanie Schreiber;M. Dennis Hanisak;Carlie S. Perricone;Andia Chaves Fonnegra;James Sullivan;Malcolm McFarland
  • 通讯作者:
    Malcolm McFarland

James Sullivan的其他文献

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{{ truncateString('James Sullivan', 18)}}的其他基金

Randomized Controlled Trial of the Effects of Rapid Rehousing on Single Adults
快速安置对单身成年人影响的随机对照试验
  • 批准号:
    1851899
  • 财政年份:
    2019
  • 资助金额:
    $ 28.91万
  • 项目类别:
    Standard Grant
Quasi-Experimental Study of the Effects of Homelessness Prevention
无家可归预防效果的准实验研究
  • 批准号:
    1629194
  • 财政年份:
    2016
  • 资助金额:
    $ 28.91万
  • 项目类别:
    Standard Grant
Autonomous holographic imaging system for long term in situ studies of marine particle dynamics.
用于海洋粒子动力学长期原位研究的自主全息成像系统。
  • 批准号:
    1634053
  • 财政年份:
    2016
  • 资助金额:
    $ 28.91万
  • 项目类别:
    Continuing Grant
Elucidating the regulation of Rsp5 a paradigm for the Nedd4-family of ubiquitin ligase proteins
阐明 Rsp5 的调节——泛素连接酶蛋白 Nedd4 家族的范例
  • 批准号:
    BB/G004412/1
  • 财政年份:
    2008
  • 资助金额:
    $ 28.91万
  • 项目类别:
    Research Grant
Technology Assessment For the Citizen
公民技术评估
  • 批准号:
    7424665
  • 财政年份:
    1975
  • 资助金额:
    $ 28.91万
  • 项目类别:
    Standard Grant

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合作研究:EAGER:表征新型湍流生成系统,以促进现实条件下昆虫定向行为的探索
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