| 夏季南海浮游植物光合固碳对不同波长阳光紫外辐射的响应 |
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| 引用本文： | 吴亚平,高坤山.夏季南海浮游植物光合固碳对不同波长阳光紫外辐射的响应[J].海洋学报,2011,33(5):146-151. |
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| 作者姓名： | 吴亚平 高坤山 |
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| 作者单位： | 厦门大学 近海海洋环境科学国家重点实验室,福建 厦门 361005 |
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| 基金项目： | 国家973计划项目(2009CB421207)。 |
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| 摘 要： | 阳光紫外(UV)辐射影响浮游植物光合固碳,且不同波长UV辐射的生理效应不一.本文以夏季南海近岸海域浮游植物为研究对象,采用生物加权函数(Biological weighting function,BWF,亦被称为UV辐射作用光谱)的研究方法,探讨了不同波长UV辐射对浮游植物群落光合固碳的作用.结果表明,在只有可见光情况...
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| 关 键 词： | BWF 光合固碳 浮游植物 紫外辐射 作用光谱 |
| 收稿时间： | 2010/6/13 0:00:00 |
Photosynthetic response of surface water phytoplankton assemblages to different wavebands of UV radiation in the South China Sea |
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| WU Ya-ping and GAO Kun-shan.Photosynthetic response of surface water phytoplankton assemblages to different wavebands of UV radiation in the South China Sea[J].Acta Oceanologica Sinica (in Chinese),2011,33(5):146-151. |
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| Authors: | WU Ya-ping and GAO Kun-shan |
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| Institution: | State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; 361005 |
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| Abstract: | The photosynthetic carbon fixation of phytoplankton was affected significantly by solar UV radiation, while these effects are wavelength dependent.We investigated the photosynthetic carbon fixation by surface water phytoplankton assemblages of the South China Sea in summer under different radiation treatments to evaluate the photosynthetic response to different wavelength of UVR.The photosynthetic carbon fixation rate was the highest under PAR treatment, with the mean value of 10.86 μg/(μg·h).When the samples were exposed to PAR+UV radiation, the photosynthetic carbon fixation rate decreased significantly, the shorter wavelength exposed, the lower photosynthetic carbon fixation rate observed.As a result, the photosynthetic carbon fixation rate under full spectrum of solar radiation was the lowest, with the mean value of 6.51 μg/(μg·h), the relative inhibition induced by UVR was about 40%.Moreover, the effects of UV radiation were wavelength dependent, biological weighting function (BWF) indicated that the shorter wavelength of UVR, the higher inhibition per energy induced.The biological weight of the shortest wavelength of UV-B (i.e.280 nm) was at least 106 times of the UV-A (＞320 nm). |
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| Keywords: | biological weighting function phytoplankton photosynthetic carbon fixation UV radiation |
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