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  • Diatoms  (1)
  • 1990-1994
  • 1975-1979  (1)
  • 1880-1889
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  • 1990-1994
  • 1975-1979  (1)
  • 1880-1889
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  • 1
    Electronic Resource
    Electronic Resource
    Vertical migration rhythm in freshwater diatoms (1977)
    Springer
    Hydrobiologia 56 (1977), S. 259-263 
    Details
    ISSN: 1573-5117
    Keywords: Diatoms ; vertical migration ; circadian rhythmicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Epipelic diatoms of a pond undergo a vertical migration rhythm moving to the surface of the sediment in the morning and downwards again in the afternoon. In the laboratory the same rhythmicity was found with a maximum of cells on the surface at noon or in the afternoon. Under the experimental conditions employed there was no evidence of two or more peaks. As in some, but not all, unicellular algae of the tidal zone, this migration shows the characteristics of endogenous circadian rhythms, such as persistance in continous light or dark and reversal of the phase by shift of 12 hours in the ‘Zeitgeber’: light.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00017513
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