Journal
NATURE COMMUNICATIONS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms9396
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Funding
- National Institutes of Health [GM112507]
- Robert Welch Foundation [F-1811]
- EU/FP7 REA grant [321777]
- Israel Science Foundation [337/12]
- Roy J. Zuckerberg Career Development Chair for Water Research
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Individual swimming bacteria are known to bias their random trajectories in search of food and to optimize survival. The motion of bacteria within a swarm, wherein they migrate as a collective group over a solid surface, is fundamentally different as typical bacterial swarms show large-scale swirling and streaming motions involving millions to billions of cells. Here by tracking trajectories of fluorescently labelled individuals within such dense swarms, we find that the bacteria are performing super-diffusion, consistent with Levy walks. Levy walks are characterized by trajectories that have straight stretches for extended lengths whose variance is infinite. The evidence of super-diffusion consistent with Levy walks in bacteria suggests that this strategy may have evolved considerably earlier than previously thought.
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