Do light quality and low nutrient concentration favour picocyanobacteria below the thermocline of the oligotrophic Lake Stechlin?

Frank Gervais, Judit Padisák, Rainer Koschel

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

In May 1995, a short-term study on the vertical distribution of phytoplankton in the holomictic, oligotrophic Lake Stechlin revealed a deep chlorophyll maximum (DCM) due to an increase in phytoplankton biomass below the thermocline. The DCM was dominated by centric diatoms, which probably just passed those water layers while sinking to the sediment, and by picocyanobacteria. The DCM was situated well above the 1% level of photosynthetically active radiation, but received almost exclusively light of wavelengths between 500 and 600 nm. The dominant picocyanobacteria were pre-adapted to this environment by the possession of phycoerythrin. The competitive advantage of picocyanobacteria compared with other phycoerythrin-containing phototrophs was probably the most efficient nutrient uptake under low nutrient conditions as a consequence of the small size of picoplankton.

Original languageEnglish
Pages (from-to)771-781
Number of pages11
JournalJournal of Plankton Research
Volume19
Issue number6
DOIs
Publication statusPublished - Jun 1997

ASJC Scopus subject areas

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

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