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Genetic Variability in Reproduction Rates in Marine Phytoplankton Populations

Larry E. Brand
Evolution
Vol. 35, No. 6 (Nov., 1981), pp. 1117-1127
DOI: 10.2307/2408125
Stable URL: http://www.jstor.org/stable/2408125
Page Count: 11
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Genetic Variability in Reproduction Rates in Marine Phytoplankton Populations
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Abstract

The acclimated reproduction rates of numerous clones of six marine phytoplankton species were measured to determine the amount of genetic variability in reproduction rates in natural phytoplankton populations. The amount of genetic variability among clones of a species from single water bottles ranged from 3-13% (coefficient of variation). Populations from estuaries (Gonyaulax tamarensis), coastal waters (Prorocentrum micans), and the Sargasso Sea (Emiliania huxleyi, Gephyrocapsa oceanica, Cyclococcolithina leptopora, and Dissodinium lunula) were examined. No relationship was found between the amount of genetic variability in the populations and the apparent variability or predictability of their environments.

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