The Relation Between Carbon Assimilation and Biomass Dynamics in a Phytoplankton Community

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Production dynamics in the phytoplankton community of a mesotrophic Texas reservoir were measured weekly over a four month period using 14C incubation and ATP assay methodologies. Assimilation values of 14C ranged from 0.2 to 45 ug C 1 hr1 - . Significant positive and occasionally negative changes in biomass (i.e. viable organic carbon) were observed in short term (4 hr) in situ incubations juxtapo-sitioned with the 14C experiments; viable organic carbon production, estimated with the ATP assay, ranged from -25 to +50 ug C 1l1hr1. Carbon assimilation and biomass changes did not correlate in either short term (4-5 hr.) or ... continued below

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vii, 86 leaves : ill.

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Wilcox, Douglas P. December 1977.

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  • Wilcox, Douglas P.

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Production dynamics in the phytoplankton community of a mesotrophic Texas reservoir were measured weekly over a four month period using 14C incubation and ATP assay methodologies. Assimilation values of 14C ranged from 0.2 to 45 ug C 1 hr1 - . Significant positive and occasionally negative changes in biomass (i.e. viable organic carbon) were observed in short term (4 hr) in situ incubations juxtapo-sitioned with the 14C experiments; viable organic carbon production, estimated with the ATP assay, ranged from -25 to +50 ug C 1l1hr1. Carbon assimilation and biomass changes did not correlate in either short term (4-5 hr.) or over the study period (6 months). However, weekly biomass trends were predicted by relative positive or negative biomass changes in the short term incubations. Biomass measurements gave a more sensitive insight into production dynamics in the phytoplankton community than did carbon assimilation measurements.

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vii, 86 leaves : ill.

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  • December 1977

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Wilcox, Douglas P. The Relation Between Carbon Assimilation and Biomass Dynamics in a Phytoplankton Community, thesis, December 1977; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc503843/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .