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Effects of Ozone-Related Increased UV-B Fluences on Photosynthesis, Photoadaptation and Viability of Phytoplankton in Antarctic Waters

Effects of Ozone-Related Increased UV-B Fluences on Photosynthesis, Photoadaptation and Viability of Phytoplankton in Antarctic Waters
与臭氧相关的 UV-B 通量增加对南极水域浮游植物光合作用、光适应和活力的影响
批准号:
9220150
负责人:
Osmund Holm-Hansen
金额:
$26.85万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1993
资助国家:
美国
项目状态:
已结题
起止时间:
1993-04-01 至 1996-03-31

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中文摘要
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英文摘要
Decreased concentrations of ozone in the stratosphere over Antarctica have resulted in increased levels of ultraviolet radiation in the UV-B portion of the spectrum incident at the earth's surface beneath the 'ozone hole'. There is now world-wide concern that this enhanced flux of UV radiation may cause serious harm to the marine ecosystem in the Southern Ocean. This project, which includes field and laboratory studies, will help to determine the effects of enhanced levels of UV-B radiation on phytoplankton, and to relate such effects to overlying ozone concentrations. UV levels determined from the NSF-Operated UV- Spectroradiometer at Palmer Station will be directly applicable to the interpretation of observed biological effects. Primary attention will be given to the effects of UV-B radiation on photosynthetic rates, on damage to DNA with resulting loss of cell viability, and on the rates and extent to which phytoplankton can minimize cellular UV damage by production of specialized protective pigments. Differential sensitivity to UV-B of dominant phytoplankton species or groups will also be determined, as such differences might have important consequences on the structure of the food web in antarctic waters. As the project's activity will cover the period from September through December, the resulting data set should encompass the period of maximal development of the ozone hole, as well as the time of the summer solstice. This project is important because it will elaborate previous findings and address in detail the extent and the nature of ultraviolet damage to phytoplankton, as well as evaluate the kinds of defenses cells can muster against it.
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会议论文
Ecological Impact of Enhance Solar Ultraviolet Radiation on Phytoplankton at High Latitudes in the Arctic
IAI Workshop: The Impact of Solar Ultraviolet Radiation on Aquatic and Terrestrial Resources in Patagonia, Argentina-Chile
U.S-Argentina Cooperative Research: Ozone-Related Impact of Solar Ultraviolet Radiation on the Marine Food Chain in Argentine Coastal Waters
  • 批准号:
    9503643
  • 项目类别:
    Standard Grant
  • 资助金额:
    $3.22万
  • 财政年份:
    1995
  • 负责人:
    Osmund Holm-Hansen
  • 依托单位:
Significance of Solar Ultraviolet Radiation in Arctic Waters: Effects on Phytoplankton and Ichthyoplankton
国内基金
海外基金
Ozone基于Nrf2/HO-1/HIP-2α通路双靶点改善主动脉夹层CPB术后低氧肺损伤
  • 批准号:
    81900369
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    20.0万元
  • 批准年份:
    2019
  • 负责人:
    邓丽
  • 依托单位: