On the chlorophyll content and biological productivity of periphytic diatom communities on the stony shores of Lake Balaton

Felföldy, Lajos (1961) On the chlorophyll content and biological productivity of periphytic diatom communities on the stony shores of Lake Balaton. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 28. pp. 99-104. ISSN 0365-3005

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Abstract

The chlorophyll content was measured and computed to unit surfaces in two characteristic zones (Diatoma elongatum- and Gomphonema oilvaceumzones) of periphytic diatom mass vegetation developing seasonally on stony shores of Lake Balaton exposed to wave action. The quantity of chlorophyll a is higher in the Gomphonema-zone (6,0- 15,4 mg/100 cm2), whereas in the Diatoma-zone it is lower (1,8-2,9 mg/100 cm²). Very little assimilation number was obtained either by the light-dark bottle method (1,03) or by the manometric method of Warburg (0,71). The value of glucose content computed on the basis of the assimilation number (1,32,1 mg glucose/100 cm²/hour) falls very near to the value obtained four years ago (1,6 mg/100 cm²/hour) which was calculated on the basis of the number of diatom frustules in the covering. It can be stated also on the basis of new estimations that in advantageous weather the diatom belt is able to reproduce itself daily (24,6 kg dry matter on a 1 km long section of shore).

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