Abstract
Quantitative investigations of bacteriological and organic matter parameters were conducted regularly at least once a week for a year at three subAntarctic benthic stations. The different bacteriological methods used (direct counts, viable counts and heterotrophic potentials) gave complementary results. Despite substantial differences in organic matter content of the different sediments, the bacterial communities were of similar density. Seasonal variations observed in the studied area were regular enough to allow a detailed analysis. A general scheme describing the reactions of the bacterial microflora to the different periods of organic input is discussed. This model, which includes three parts (lag phase, growing phase and return to the initial state), allows the interpretation of the bacterial responses observed during the benthic surveys.
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