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SOME INTERACTIONS OF TEMPERATURE, LIGHT INTENSITY, AND NUTRIENT CONCENTRATION DURING THE CONTINUOUS CULTURE OF NITZSCHIA CLOSTERIUM AND TETRASELMIS SP 1
Author(s) -
Maddux William S.,
Jones Raymond F.
Publication year - 1964
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1964.9.1.0079
Subject(s) - tetraselmis , seawater , nutrient , phosphate , light intensity , nitrate , algae , growth rate , chemistry , biology , environmental chemistry , botany , ecology , biochemistry , mathematics , physics , geometry , optics
A continuous culture apparatus was used to measure growth rates of Nitzschia closterium and Tetraselmis sp. at different temperatures and light intensities and at two different levels of nitrate and phosphate enrichment of artificial seawater. A set of symmetrical relationships was found between light, temperature, and nutrient concentration in which the interaction of any two of the factors was modified by varying the third. The optimum temperatures yielding maximum growth rates in a daily light‐and‐dark cycle were lower when a medium with nitrate and phosphate concentrations similar to those found in natural waters was used than when a medium having higher concentrations of these substances was used. The results of batch culture experiments with high nutrient concentrations may not be applicable, therefore, to natural situations.