Bacterial utilization of different molecular sizes of dissolved organic carbon (DOC) was investigated in the northern Adriatic sea. DOC classes were separated using a cascade ultrafiltration system (10 and 1 kDa molecular weight cutoff). The lowest bacterial growth efficiency and DOC utilization rate were in all experiments observed in the 1-10 kDa fraction. Based on these results the above fraction seems to cycle slower compared to other fractions. Nutrient addition (P+N) to bacterial cultures increased DOC utilization rates suggesting a nutritional limitation of the substrate.
Bacterial utilization of different DOC size classes and demand for inorganic nutrients in the Northern Adriatic Sea
Zoppini A;Fazi S;Pettine M;Tandoi V
1998
Abstract
Bacterial utilization of different molecular sizes of dissolved organic carbon (DOC) was investigated in the northern Adriatic sea. DOC classes were separated using a cascade ultrafiltration system (10 and 1 kDa molecular weight cutoff). The lowest bacterial growth efficiency and DOC utilization rate were in all experiments observed in the 1-10 kDa fraction. Based on these results the above fraction seems to cycle slower compared to other fractions. Nutrient addition (P+N) to bacterial cultures increased DOC utilization rates suggesting a nutritional limitation of the substrate.File in questo prodotto:
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