The impact of UV-B radiation and different PAR intensities on growth, uptake of 14C, excretion of DOC, cell volume, and pigmentation in the marine prymnesiophyte, Emiliania huxleyi |
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Authors: | Garde Cailliau |
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Institution: | The International Agency for 14C Determination, VKI, Agern Allé 11, DK-2970, H?rsholm, Denmark |
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Abstract: | The impact of UV-B radiation (280-320 nm) and different PAR (400-700 nm) intensities on growth, uptake of 14C, excretion of DOC, cell volume, and pigmentation in the marine prymnesiophyte, Emiliania huxleyi2.7 kJ m(-2) UV-B(BE), changes in incorporation and excretion rate of 14C, and indications of DNA damage (in the form of termination of cell division and enlarged cell volume) were observed. Since the UV-B doses used are representative of UV-B doses in the top layer of clear ocean water and E. huxleyi is a common bloom-forming algae with a wide geographic distribution, it is suggested that current UV-B intensities have an impact on primary production and phytoplankton biomass. |
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