Ref ID : 1117
Edward J. Brown, Don K. Button, and Douglas S. Lang; Competition between heterotrophic and autotrophic microplankton for dissolved nutrients. Microbial Ecology 7:199-206, 1981
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When a heterotrophic (Rhodotorula rubra) and a phototrophic (Selenastrum capricornutum) plankton were grown together in dilute phosphate (Pi) continuous cultures, coexistence occurred only when the heterotroph was growth rate limited by organic carbon (C). Because of its higher affinity for (Pi), and because (C) starvation does not affect the heterotrophic yeast's ability to transport (Pi), the concentration of organic carbon indirectly controlled the biomass of the phototroph. The result support a threshold model of macrobial growth.