Orthophosphate uptake of planktonic microorganisms in lake Balaton

The seasonal uptake of orthophosphate by natural plankton in Balaton lake, was investigated. This shallow elongated lake could be considered to consist of 4 basins in series. The study was carried out in the first and fourth basins, representing hypertrophic and mesotrophic conditions. Initial uptak...

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Bibliographic Details
Published in:Hydrobiologia 1985-01, Vol.122 (2.-159-166.), p.2-159-166
Main Authors: Istvanovics, V, Herodek, S
Format: Article
Language:English
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Summary:The seasonal uptake of orthophosphate by natural plankton in Balaton lake, was investigated. This shallow elongated lake could be considered to consist of 4 basins in series. The study was carried out in the first and fourth basins, representing hypertrophic and mesotrophic conditions. Initial uptake of phosphate followed first order kinetics in accordance with a simple two-compartment model. Turnover times for orthophosphate in water were estimated to be some minutes in summer and two orders of magnitude greater in winter and spring. For microorganisms, turnover times for phosphorus ranged from 28 min in summer to over 1000 min in winter. There was evidence that phosphorus was limiting for plankton, but this became less so with increase in eutrophication.
ISSN:0018-8158