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Changes in bacterial abundances on precolonized model aggregates in sterile seawater. The aggregates were transferred from long-term incubations to sterile seawater (closed symbols) or sterile seawater plus antibiotics (open symbols) at time zero. The lines are fitted exponential regressions. Error bars indicate standard deviations. (A to F) Data from experiments 4, 6, 11, 9, 15, and 18, respectively.
