Abstract
The acclimated reproduction rates of 14 clones of the diatom Thalassiosira pseudonana were measured at 12°, 16°, 20°, and 24°C. Reproduction rate increased monotonically with an increase in temperature in all 14 clones. Significant genetic variability in reproduction rates and electrophoretic mobility of isozymes were observed among clones within a population from a single water bottle collected in a warm core eddy overlying slope water. The major genetic differentiation was between neritic and oceanic populations, with neritic clones having higher reproduction rates at all 4 temperatures. Surprisingly small genetic differences were observed among clones from neritic waters around the world. The slopes of the temperature-reproduction rate plots of all 14 clones were quite similar.
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Communicated by I. Morris, Durham
Woods Hole Oceanographic Institution Contribution No. 4679
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Brand, L.E., Murphy, L.S., Guillard, R.R.L. et al. Genetic variability and differentiation in the temperature niche component of the diatom Thalassiosira pseudonana . Mar. Biol. 62, 103–110 (1981). https://doi.org/10.1007/BF00388171
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DOI: https://doi.org/10.1007/BF00388171