Spatiotemporal dynamics of different CO₂ fixation strategies used by prokaryotes in a dimictic lake.

ABSTRACT: The Calvin-Benson-Bassham (CBB) cycle and the 3-hydroxypropionate/4-hydroxybutyrate (HP/HB) cycle are two inorganic carbon assimilation pathways widely used by prokaryotic autotrophs in lakes. We investigated the effect of mixing periods and stable water stratification patterns on the trajectories of both CO₂ fixation strategies in a dimictic lake (Piburger See), because information on the spatiotemporal dynamics of prokaryotes using these pathways in freshwater ecosystems is far from complete. Based on a quantitative approach (droplet digital PCR) of genes coding for key enzymes in different CO₂ assimilation pathways, nine depths covering the entire water column were investigated on a monthly basis for one year. Our data show that the abundance of photoautotrophs and

SUBMITTER: Alfreider A 

PROVIDER: S-EPMC6803681 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature