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Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series

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Stable swarming using adaptive long-range interactions.

Dan Gorbonos¹, Nir S Gov¹

¹Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.

Physical Review. E

|May 17, 2017

Summary

This summary is machine-generated.

Biological sensory adaptivity, a mechanism reducing sensitivity to strong stimuli, stabilizes swarms by decreasing effective forces with increasing density. This prevents population collapse, demonstrating a natural self-stabilization in living organisms.

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Area of Science:

Biology
Physics
Complex Systems

Background:

Biological sensory mechanisms exhibit adaptivity, adjusting sensitivity based on stimulus amplitude.
This adaptivity is an energy-consuming process, reflecting the nonequilibrium nature of life.

Purpose of the Study:

To investigate the impact of sensory adaptivity on effective inter-organism forces within a uniform swarm.
To analyze these effects in both two and three-dimensional swarm contexts.

Main Methods:

Modeling attractive, long-range, power-law interactions between individuals in a swarm.
Applying linear stability analysis to assess swarm dynamics under adaptive forces.

Main Results:

Adaptivity dramatically reduces effective forces as swarm density increases, or keeps them constant.
Adaptive forces were shown to prevent swarm collapse, analogous to Jeans instability.

Conclusions:

Sensory adaptivity provides a natural self-stabilization mechanism for biological swarms.
This property is crucial for maintaining swarm integrity and preventing catastrophic collapse.