The quantity, vertical and horizontal distribution of the total bacterioplankton of Lake Balaton in 1966/67

Oláh, János (1969) The quantity, vertical and horizontal distribution of the total bacterioplankton of Lake Balaton in 1966/67. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 36. pp. 185-195. ISSN 0365-3005

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Abstract

1. Applying Razumov’s direct method, the total number of bacteria at 15 standard sites in the open water of Lake Balaton has been determined; the studies were based on the vertical and horizontal samples taken monthly in 1966 and 1967. 2. Compared with the earlier data referring to the heterotrophic bacteria, the number of total bacteria proved to be 10,000 times higher. 3. In 1966 and 1967, the average number of bacteria was 2,2·10⁵/ml in the open water of Lake Balaton, and the most prominent values reached one million. 4. The seasonal course of the total bacterioplankton was different in the diverse section in both years. In the case of the shallow, cnnstantly disturbed waters of the lake changes involving shorter periods play a presumably greater role in the quantitative evolvement of the bacterioplankton. 5. In the open water of the lake, the vertical distribution of the bacterioplankton is characterizable by unevenness. Owing to the dynamism of the water the distribution is extremely mobile and short-lived.

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