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The influence of longwave ultraviolet radiation (u.v.-A) on the photosynthetic activity (14C-assimilation) of phytoplankton

Bühlmann, B. ; Bossard, P. ; Uehlinger, U.

In: Journal of Plankton Research, 1987, vol. 9, no. 5, p. 935-943

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    Title
    • The influence of longwave ultraviolet radiation (u.v.-A) on the photosynthetic activity (14C-assimilation) of phytoplankton
    Author
    • Bühlmann, B.. Institute of Aquatic Sciences (EAWAG), Swiss Federal Institute of Technology (ETH), CH-8600 DQbendorf, Switzerland
    • Bossard, P.. Institute of Aquatic Sciences (EAWAG), Swiss Federal Institute of Technology (ETH), CH-8600 DQbendorf, Switzerland
    • Uehlinger, U.. Institute of Aquatic Sciences (EAWAG), Swiss Federal Institute of Technology (ETH), CH-8600 DQbendorf, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal of Plankton Research, 1987, vol. 9, no. 5, p. 935-943. Oxford University Press
    Other Version
    Classification
    • Health
    Keywords
    OAI-PMH Identifier
    • oai:doc.rero.ch:298577
    Summary
    The impact of u.v.-A (315-400 nm) on phytoplanktonic C-assimilation has been studied in situ and in the laboratory under artificial light. Water samples from Lake Lucerne were placed in DURAN-glass bottles and incubated either covered or uncovered with u.v. absorbing transparent tubes. Exposure to u.v.-A clearly inhibited 14C-assimilation in the uncovered samples both in situ and in the laboratory. Variations in visible light intensity and filtering of u.v.-B selectively demonstrated small inhibition of 14C-assimilation. U.v.-A inhibition of productivity is the major factor in the well known depression in productivity for surface waters