Phytoplankton structure and microcystine concentration in the highly eutrophic Nero Lake

The results of observations of some abiotic (water transparency, light intensity, depth, biogenic element concentrations) and algological (chlorophyll concentration, phytoplankton abundance and biomass, the concentration of microcystines—toxins of blue-green algae) characteristics of Lake Nero are g...

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Bibliographic Details
Published in:Water resources 2011-03, Vol.38 (2), p.229-236
Main Authors: Babanazarova, O. V., Kurmayer, R., Sidelev, S. I., Aleksandrina, E. M., Sakharova, E. G.
Format: Article
Language:English
Subjects:
Algae
Aquatic plants
Aquatic Pollution
Cyanobacteria
Earth and Environmental Science
Earth Sciences
Eutrophication
Hydrogeology
Hydrology/Water Resources
Lakes
Light intensity
Liquid chromatography
Phytochemicals
Phytoplankton
Plankton
Spectrometry
Toxins
Waste Water Technology
Water analysis
Water depth
Water Management
Water Pollution Control
Water Quality and Protection: Environmental Aspects
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Summary:The results of observations of some abiotic (water transparency, light intensity, depth, biogenic element concentrations) and algological (chlorophyll concentration, phytoplankton abundance and biomass, the concentration of microcystines—toxins of blue-green algae) characteristics of Lake Nero are given for study periods of 1999–2004 and 2005–2007. Variations of these characteristics in the latter period are shown to be significant. The lake phytoplankton is found to pass in a «catastrophic” manner to monodomination of planktotrichaetic complex of blue-green algae. High-performance liquid chromatography was used for the first time to determine the concentration of microcystines MC-LR and MC-RR in Lake Nero seston. The presence of these types of microcystines in samples was confirmed by mass-spectrometry. A statistically significant correlation was found to exist between the total concentrations of microcystines and the biomass of species of Microcystis genus, suggesting the possible toxicity of representatives of this type of algae in Lake Nero.
ISSN:0097-8078
1608-344X
DOI:10.1134/S0097807811020023