Marine Biology

, Volume 39, Issue 1, pp 1–9 | Cite as

Influence of light and temperature on the growth rate of estuarine benthic diatoms in culture

  • W. Admiraal
Article

Abstract

Four species of estuarine benthic diatoms: Amphiprora c. f. paludosa W. Smith, Nitzschia c. f. dissipata (Kützing) Grunow, Navicula arenaria Donkin, and Nitzschia sigma (Kützing) W. Smith were grown in unialgal cultures. The growth rates of the diatoms were determined as the rate of increase of the chlorophyll a content of the cultures. The diatoms were cultured at different combinations of temperture, daylength, and quantum irradiance. The highest growth rates of Navicula arenaria occurred at 16° to 20°C; the other 3 species had their optimum at 25°C or higher. The small-celled species had higher growth rates at their optimum temperature, but at lower temperatures the growth rates of all 4 species became very similar. The minimum daily quantum irradiance that could effect light-saturated growth at 12° and 20°C ranged from 2.5 to 5.0 E.m-2.day-1. At 12°C, two species had their highest growth rates under an 8 h daily photoperiod. At 20°C, the three species tested all had highest growth rates under 16 h daily photoperiod. The growth response of the benthic diatoms is comparable to that of several cultures of planktonic diatoms, as described in the literature. The influence of temperature and quantum irradiance on the diatoms in the present investigation was comparable to the influence of temperature and light intensity on the 14C-fixation of marine benthic diatoms (Colijn and van Buurt, 1975).

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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • W. Admiraal
    • 1
  1. 1.Eems-Dollard Project, Department of Systematic BotanyUniversity of GroningenHarenThe Netherlands

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