Distribution of organic matter and bacteria in the upper layer of bottom deposit in the open water of Lake Balaton

Ponyi, Jenő and Oláh, János and Frankó, András (1972) Distribution of organic matter and bacteria in the upper layer of bottom deposit in the open water of Lake Balaton. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 39. pp. 141-148. ISSN 0365-3005

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Abstract

1. The upper layer of the bottom deposit in the open water of Lake Balaton is poor in organic materials. The values obtained were 3—4% except for the Bay of Keszthely where values of 8—9% were registered. Noteworthy quantitative differences in the organic matter content between the different points of the individual transversal sections were found only in the Bay of Keszthely. 2. Values of Kjeldahl-N content in the different areas of bottom are nearly identical (0,3 —0,5%).3. Amounts of HCl-soluble materials in the Bay of Keszthely and its neighbourhood are 46—51% and in the other areas of the lake over 60%, and proceeding from the southern shore northward the amounts increase in most of the transversal sections. 4. Average bacterial counts and the amounts of the 3 5 µ fractions of particulate organic materials in the bottom are generally higher in the Bay of Keszthely and its neighbourhood than in other areas of the lake. The quantitative distribution of bacteria and particulate organic materials along the transversal sections is heterogeneous.

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