Glass effect and the microbial plankton-seston relation in the water of lakes Balaton and Belső

Oláh, János (1971) Glass effect and the microbial plankton-seston relation in the water of lakes Balaton and Belső. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 38. pp. 153-160. ISSN 0365-3005

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Abstract

1. In the water of lakes Balaton and Belső with different trophic level the significance of the glass effect has been indicated by the vaule of S, the proportion between the highest number of bacterial measured during the incubation and the initial number of bacteria. 2. In the filtered water the values of S were always larger than those in the unfiltered water and increased parallel with the increasing organic matter content in the media employed in detecting of the glass effect. In the filtered water of Lake Balaton the values of S was higher by two orders of magnitude, than those in the water of the highly eutrophic Lake Belső. This suggests a direct relation between the significance of the glass effect and the trophic level. 3. In Lake Balaton the 56 per cent of the total microbial plankton was attached to the seston in the investigated period. At the heterotrophic microorganisms this percentage increased to 96. In the water of Lake Belső the seston-attachment was smaller (45 and 84 per cent). The differences between the two lakes were even higher in the case of the attachment to the inorganic seston.

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