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Bioconvection in Action

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Illustration of bacteria properties in the experiment. Text reads: "Situation: we have bacteria with the following properties. Sulfur granules within the cell wall give them an unsymmetrical moment of inertia, causing flows to induce a torque that influences their swimming direction. Negatively buoyant cells follow a biased random walk (chemotaxis) along the oxygen gradient."

Image of bright, sinking plumes forming in the experiment. Text reads: "High density plumes (of cells) emerge"

Image of small- and large-scale convection patterns in the experiment. Text reads, "This is called bioconvection."

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