engleski

Regulation of bacterial abundance in the middle Adriatic sea : interaction between spatial and seasonal scale

Bacterial and heterotrophic nanoflagellates (HNF) abundance, production, growth and grazing rates were studied monthly from January 1995 to December 1997 along the trophic gradient in the middle Adriatic Sea. The most significant relationship between bacterial abundance and production was established in the oligotrophic area, and during the winter-spring period suggesting that substrate supply could be the most importantn factor in bacterial control. On the other hand, inconsistent relationship between bacterial abundance and productivity in the eutrophic area and during the summer-autumn period suggests conditions in which substrate supply is above saturating level, or in which mortality factors such as bacterivory and viral lysis are very strong.

bacteria; heterotrophic nanoflagellates; spatial scale; seasonal scale

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