Mechanism determining plume termination and cell departure

Determine what dictates how and where a bioconvective plume ends and how Thiovulum sp. ST cells leave the plume.

Background

Thiovulum sp. ST forms mature downward-swimming plumes and associated bioconvection vortices in a Hele-Shaw chamber. Although mature plumes typically span the chamber’s full length, the associated vortices terminate at distinct vertical levels rather than extending throughout the chamber.

The paper reports that the mechanism governing plume termination and the manner in which cells exit a plume has not been resolved. Understanding this mechanism is important for explaining the organization and persistence of the observed multiscale bioconvective patterns.],

quote snippets here?

References

Surprisingly, while mature plumes typically extend the entire length of the chamber, the bioconvection-induced vortices do not (Fig.~2g). Instead, distinct vertical levels of bioconvection vortices form. What dictates how and where a plume ends and how cells leave a plume remains unclear.

— Pattern Formation in Bioconvection of Thiovulum in a Hele-Shaw Chamber  (2608.16145 - Johnson et al., 17 Aug 2026) in Paragraph beginning “The chemotactic response is observable...” immediately following Fig. 2