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The Influence of Growth Conditions on the Size Dependence of Maximal Algal Density and Biomass

Susana Agusti and Jacob Kalff
Limnology and Oceanography
Vol. 34, No. 6 (Sep., 1989), pp. 1104-1108
Stable URL: http://www.jstor.org/stable/2837200
Page Count: 5
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The Influence of Growth Conditions on the Size Dependence of Maximal Algal Density and Biomass
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Abstract

The maximal density achieved by 11 freshwater microalgae (mostly Chlorophyta) with a wide range in cell size, grown under standardized conditions, varied as the -0.79 power of their cell volume. The proximity of this exponent to 0.75 (3/4 rule) and the fact that the relationship was not significatively altered by light limitation $(11 \mu Einst m^-2 s^-1)$ suggest that physiological constraints, and not self-shading as proposed in the past, should be responsible for the existence of the size-dependent maximum density. The results also demonstrate a positive relationship between cell size and maximal biomass that is in agreement with previous field observations.

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