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Spatiotemporal self-organization of fluctuating bacterial colonies

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Grafke, Tobias, Cates, Michael E. and Vanden-Eijnden, Eric (2017) Spatiotemporal self-organization of fluctuating bacterial colonies. Physical Review Letters, 119 (18). 188003 . doi:10.1103/PhysRevLett.119.188003

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Official URL: https://doi.org/10.1103/PhysRevLett.119.188003

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Abstract

We model an enclosed system of bacteria, whose motility-induced phase separation is coupled to slow population dynamics. Without noise, the system shows both static phase separation and a limit cycle, in which a rising global population causes a dense bacterial colony to form, which then declines by local cell death, before dispersing to reinitiate the cycle. Adding fluctuations, we find that static colonies are now metastable, moving between spatial locations via rare and strongly nonequilibrium pathways, whereas the limit cycle becomes almost periodic such that after each redispersion event the next colony forms in a random location. These results, which hint at some aspects of the biofilm-planktonic life cycle, can be explained by combining tools from large deviation theory with a bifurcation analysis in which the global population density plays the role of control parameter.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
Q Science > QR Microbiology
Divisions: Faculty of Science, Engineering and Medicine > Science > Mathematics
Library of Congress Subject Headings (LCSH): Bacteria -- Population dynamics -- Mathematical models, Biofilms -- Life cycles, Plankton -- Life cycles
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 3 November 2017
Dates:
DateEvent
3 November 2017Available
4 October 2017Valid
2 October 2017Accepted
Volume: 119
Number: 18
Article Number: 188003
DOI: 10.1103/PhysRevLett.119.188003
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288
DMR-1420073National Science Foundationhttp://dx.doi.org/10.13039/100000001
DMS-1522767National Science Foundationhttp://dx.doi.org/10.13039/100000001
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