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Accumulation of strains HP11, HP39, and HP15 bacteria on enriched (open symbols, dotted lines) and unenriched (closed symbols, solid lines) 0.2-cm agar spheres in still water. Equation 8a has been fitted to the data (lines). In panels A, B, and D the agar spheres were enriched with 15 g of marine broth liter−1; in panel C the agar spheres were enriched with 1 mM DMSP. Error bars indicate the standard deviations of 10 measurements.
