Concentration and microbiological utilization of small organic molecules in the Scheldt estuary, the Belgian coastal zone of the North Sea and the English Channel

摘要: Concentrations and utilization rates of alanine, aspartate, lysine, glucose, glycollic, acetic lactic acids have been determined on six occasions at least, during a full seasonal cycle in the water column three stations (Scheldt estuary, coastal North Sea English Channel) with greatly differing biological characteristics. No significant differences substrate concentration could be detected between stations, although rate all substrates differed greatly, decreasing order estuarine〉coastal〉open sea environment. This apparent paradox is explained by aid simple model showing that steady state particular independent its production (and thus consumption) depends only purely physiological characteristics bacteria. Using published data for pertinent parameters marine bacteria, accounts least magnitude concentrations observed, absence important variations.