Abstract
Two reservoirs, constructed for pollution control in the catchment area of Lake Balaton, were studied. Both are hypertrophic due to high phosphorus loading, and both are rich in dissolved humic substances (colour in Pt units usually varies between 50–150 Pt, mg 1_1) as they were built on former wetland areas. We measured planktonic primary production with 14C technique, and bacterioplankton production using the [methyl-3H]thymidine incorporation method. The levels of dissolved organic carbon (DOC) and humic substances (as water colour) present were investigated. Temperature, pH and light intensity at different depths were recorded regularly. In both reservoirs studied the bacterioplankton production was as high as the phytoplankton production and in some cases significantly exceeded it. Dissolved humic substances proved to be an important substrate for planktonic bacteria in these water bodies.
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V.-Balogh, K., Vörös, L. (1997). High bacterial production in hypertrophic shallow reservoirs rich in humic substances. In: Kufel, L., Prejs, A., Rybak, J.I. (eds) Shallow Lakes ’95. Developments in Hydrobiology, vol 119. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5648-6_7
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DOI: https://doi.org/10.1007/978-94-011-5648-6_7
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