A new perspective on ocean photosynthesis (N-POP)

海洋光合作用的新视角(N-POP)

基本信息

  • 批准号:
    NE/W000903/1
  • 负责人:
  • 金额:
    $ 82.76万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2023
  • 资助国家:
    英国
  • 起止时间:
    2023 至 无数据
  • 项目状态:
    未结题

项目摘要

Sunlight penetrating into the ocean is the ultimate source of energy in oceanic ecosystems. This energy sustains fisheries and catalyses biogeochemical cycles that influence the carbon cycle and ultimately climate. Single-celled photosynthetic organisms termed phytoplankton are the gatekeepers of this energy flux, achieved via the absorption of light by photosynthetic pigments such as chlorophyll. However, the range of processes in the cell that determine how this light energy is subsequently used to support growth and survival of these crucial organisms are not well characterised. This 'knowledge gap' is a result of the current paradigm that mainly considers photosynthesis in terms of the amount of 'carbon fixed' rather than 'energy captured'. Here we propose that natural phytoplankton taxa are more adaptable in their energetic metabolism than currently assumed, using different 'molecular strategies' to specifically power a range of critical cellular processes beyond carbon fixation. These different strategies potentially represent more than half of photosynthetic energy flux in many circumstances. The corresponding diversity of metabolic strategies is thus likely to represent a fundamental process through which these crucial organisms adapt to thrive across different ocean ecosystems.We will obtain an improved understanding of how phytoplankton use light energy in ocean systems, which is critical to our ability to understand how oceanic ecosystems operate and thus predict how the ecosystem services they provide (including sustaining fisheries, sequestering atmospheric CO2 and producing other climate reactive gases) may change as the global system evolves. For example, we currently use satellites to measure the colour of the ocean and hence estimate phytoplankton abundance and infer rates of primary production without a full mechanistic understanding of how these phytoplankton use the available light energy. Such understanding of the coupling of light energy capture to cellular survival, growth rate and carbon fixation is crucial for facilitating better estimates of primary production and ultimately understanding the key role of the oceanic biota in the global carbon cycle. To achieve this, we propose an observational and experimental program that will define how diverse phytoplankton communities use light energy over natural gradients in nutrient and light availability. We will undertake a research cruise encompassing the South Atlantic, as well as the iron-limited regions of the Southern Ocean, to sample natural phytoplankton communities at sea. These will be analysed to determine their rates of photosynthesis and, through molecular functional and community structure analysis, to define the processes involved in harvesting and using photosynthetic energy. The information from the natural community experiments will be extrapolated to a larger scale via network analysis and mapping approaches to generate a global understanding of how cells use light energy.Our deliverables will be an observationally and experimentally derived integrated view of the environmental and physiological controls on how phytoplankton in ocean systems actually use light energy to power all cellular processes (beyond only considering carbon fixation) (OB1 and OB2), and a global-scale synoptic synthesis of where and when different photosynthetic strategies are used by phytoplankton (OB3). We expect this to move the paradigm away from the 'carbon-centric view' to more fully consider the potentially >50% of phytoplankton light energy usage that powers the metabolisms of the organisms underpinning the productivity of ocean ecosystems.
穿透海洋的阳光是海洋生态系统中能源的最终来源。这种能量可以维持渔业,并催化影响碳循环并最终气候的生物地球化学周期。 Single-celled photosynthetic organisms termed phytoplankton are the gatekeepers of this energy flux, achieved via the absorption of light by photosynthetic pigments such as chlorophyll. However, the range of processes in the cell that determine how this light energy is subsequently used to support growth and survival of these crucial organisms are not well characterised. This 'knowledge gap' is a result of the current paradigm that mainly considers photosynthesis in terms of the amount of 'carbon fixed' rather than 'energy captured'. Here we propose that natural phytoplankton taxa are more adaptable in their energetic metabolism than currently assumed, using different 'molecular strategies' to specifically power a range of critical cellular processes beyond carbon fixation.在许多情况下,这些不同的策略可能代表了一半以上的光合能通量。 The corresponding diversity of metabolic strategies is thus likely to represent a fundamental process through which these crucial organisms adapt to thrive across different ocean ecosystems.We will obtain an improved understanding of how phytoplankton use light energy in ocean systems, which is critical to our ability to understand how oceanic ecosystems operate and thus predict how the ecosystem services they provide (including sustaining fisheries, sequestering atmospheric CO2 and producing other climate反应性气体)可能会随着全球系统的发展而变化。 For example, we currently use satellites to measure the colour of the ocean and hence estimate phytoplankton abundance and infer rates of primary production without a full mechanistic understanding of how these phytoplankton use the available light energy. Such understanding of the coupling of light energy capture to cellular survival, growth rate and carbon fixation is crucial for facilitating better estimates of primary production and ultimately understanding the key role of the oceanic biota in the global carbon cycle. To achieve this, we propose an observational and experimental program that will define how diverse phytoplankton communities use light energy over natural gradients in nutrient and light availability. We will undertake a research cruise encompassing the South Atlantic, as well as the iron-limited regions of the Southern Ocean, to sample natural phytoplankton communities at sea. These will be analysed to determine their rates of photosynthesis and, through molecular functional and community structure analysis, to define the processes involved in harvesting and using photosynthetic energy. The information from the natural community experiments will be extrapolated to a larger scale via network analysis and mapping approaches to generate a global understanding of how cells use light energy.Our deliverables will be an observationally and experimentally derived integrated view of the environmental and physiological controls on how phytoplankton in ocean systems actually use light energy to power all cellular processes (beyond only considering carbon fixation) (OB1 and OB2), and a global-scale synoptic浮游植物(OB3)使用了不同的光合策略的合成。 We expect this to move the paradigm away from the 'carbon-centric view' to more fully consider the potentially >50% of phytoplankton light energy usage that powers the metabolisms of the organisms underpinning the productivity of ocean ecosystems.

项目成果

期刊论文数量(0)
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Thomas Bibby其他文献

Thomas Bibby的其他文献

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{{ truncateString('Thomas Bibby', 18)}}的其他基金

Tapping the Unused Potential of Photosynthesis
挖掘光合作用未利用的潜力
  • 批准号:
    BB/P019331/1
  • 财政年份:
    2018
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Research Grant
14-PSIL: Plug and Play Photosynthesis for RuBisCO Independent Fuels
14-PSIL:RuBisCO 独立燃料的即插即用光合作用
  • 批准号:
    BB/M011305/1
  • 财政年份:
    2015
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Research Grant
Plug'n Play Photosynthesis for Rubisco Independent Fuels
用于 Rubisco 独立燃料的即插即用光合作用
  • 批准号:
    BB/I02447X/1
  • 财政年份:
    2011
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Research Grant
Quantitifaction of the metabolic proteins that drive biogeochmical cycles in marine systems
驱动海洋系统生物地球化学循环的代谢蛋白的定量
  • 批准号:
    NE/F019254/1
  • 财政年份:
    2009
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Research Grant
The impact of iron availability on the ecology of Prochlorococcus populations in the Sargasso Sea
铁的可用性对马尾藻海原绿球藻种群生态的影响
  • 批准号:
    NE/E009670/1
  • 财政年份:
    2007
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Research Grant
Student-Originated Studies
学生自主研究
  • 批准号:
    7705278
  • 财政年份:
    1977
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Standard Grant

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  • 财政年份:
    2021
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Wave-current interaction in the ocean surface layer; New perspective in its dynamics and global evaluation of resultant mixing
海洋表层的波流相互作用;
  • 批准号:
    19H01968
  • 财政年份:
    2019
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Comparative study of dismissal legislation and dismissal dispute resolution system in eight Asian countries - From the perspective of SMEs and business culture
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  • 批准号:
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  • 财政年份:
    2018
  • 资助金额:
    $ 82.76万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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