Fig 8.

Bacterial accumulation by chemotaxis. (A) Chemotaxis of a natural bacterial community toward a detritus particle. (Reproduced from reference 28a with permission.) (B) Chemotaxis of Pseudoalteromonas haloplanktis toward a pulse of phytoplankton exudates. The original footprint of the pulse corresponds to a band of 300-μm width, extending across the image from left to right, in correspondence to the black vertical bar. The image was acquired 2 min after release of the pulse and shows intense accumulation of trajectories (white paths) at the center of the pulse. (Reproduced from reference 186 with permission.)