Repository of the Academy's Library

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

Gervais, Frank and Padisák, Judit and Koschel, Rainer (1997) Do light quality and low nutrient concentration favour picocyanobacteria below the thermocline of the oligotrophic Lake Stechlin? Journal of Plankton Research, 19 (6). pp. 771-781. ISSN 0142-7873

[img]
Preview
PDF
1014063.pdf

Download (763Kb)

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.

Item Type: Article
Subjects: Q Science / természettudomány > QE Geology / földtudományok > QE08 Hydrosphere. Hydrology / hidroszféra, hidrológia
Q Science / természettudomány > QH Natural history / természetrajz > QH301 Biology / biológia
Q Science / természettudomány > QK Botany / növénytan
Depositing User: Erika Bilicsi
Date Deposited: 30 Oct 2012 08:54
Last Modified: 30 Oct 2012 08:54
URI: http://real.mtak.hu/id/eprint/3228

Actions (login required)

View Item View Item