publication . Article . 1991

The production of dissolved organic matter by phytoplankton and its importance to bacteria: patterns across marine and freshwater systems

Michael L. Pace; Stephen B. Baines;
Open Access
  • Published: 01 Jan 1991
We analyzed published rates of extracellular release (ER) of organic carbon to determine the primary constraints on this process and its importance to bacteria. From 16 studies we extracted observations of ER, particulate primary production (PP), and phytoplankton biomass. In a regression model based on 225 observations, PP explained 69% of the variance in ER. From this model we estimate the average percent extracellular release (PER) to be 13% of total fixation. The slope of this relationship does not support the hypothesis that the PER declines with increasing productivity. Differences exist between marine and freshwater systems. In lakes, ER increases nonline...
free text keywords: Aquatic Science, Oceanography, Total organic carbon, Phytoplankton, Ecology, Biology, Particulates, Bacterial growth, Environmental chemistry, Eutrophication, Organic matter, chemistry.chemical_classification, chemistry, Dissolved organic carbon, Pelagic zone
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