Kirstein, K.-O. (1991) Annual variation of bacterial number, production and activity in Central Kiel Bight. Kieler Meeresforschungen - Sonderheft, 8 . pp. 8-13.

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Abstract

In connection with the international monitoring programme of the Baltic Sea, supervised by the Helsinki Commission (HELCOM) microbiological investigations were carried out at 5 stations situated in the Western Baltic Sea. Data from the 3 most frequently monitored stations are presented with a special regard to station Kiel Bight. Total bacterial number shows a maximum value of 3 x 106 cells x ml-1 in July 1988 and 3.8 x 106 cells x ml-1 at 2 m depth in June 1989 and exhibits nearly the same pattern in annual variation as bacterial production, measured by thymidine incorporation. Number of saprophytic bacteria turned out to be a fraction of ≈ 0.1 % of total bacterial number. While maximum of total bacterial number was found to coincide with shortest turnover times of glucose and maximum of bacterial production, this was not observed with the number of saprophytes.

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