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Limitation Of Bacterial Growth By Dissolved Organic Matter And Iron In The Southern Ocean, Mj Church, Da Hutchins, Hw Ducklow
Limitation Of Bacterial Growth By Dissolved Organic Matter And Iron In The Southern Ocean, Mj Church, Da Hutchins, Hw Ducklow
VIMS Articles
The importance of resource limitation in controlling bacterial growth in the high-nutrient, low-chlorophyll (HNLC) region of the Southern Ocean was experimentally determined during February and March 1998. Organic- and inorganic-nutrient enrichment experiments were performed between 42 degrees S and 55 degrees S along 141 degrees E. Bacterial abundance, mean cell volume, and [H-3]thymidine and [H-3]leucine incorporation were measured during 4- to 5-day incubations. Bacterial biomass, production, and rates of growth all responded to organic enrichments in three of the four experiments. These results indicate that bacterial growth was constrained primarily by the availability of dissolved organic matter. Bacterial growth in …