Genetic variability and differentiation in the temperature niche component of the diatom Thalassiosira pseudonana

L. E. Brand, L. S. Murphy, R. R.L. Guillard, H. t. Lee

Research output: Contribution to journalArticle

44 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)103-110
Number of pages8
JournalMarine Biology
Volume62
Issue number2-3
DOIs
StatePublished - May 1 1981
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

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