Regensburg 2019 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 58: Active matter II (joint session BP/CPP/DY)
DY 58.5: Vortrag
Freitag, 5. April 2019, 10:30–10:45, H11
Bacterial Swarming Dynamics — •Hannah Jeckel1, 2, 3, Eric Jelli1,2, Raimo Hartmann1, Praveen Singh1, Rachel Mok3,4, Jan Frederik Totz5, Lucia Vidakovic1, Bruno Eckhardt2, Jörn Dunkel3, and Knut Drescher1,2 — 1Max Planck Institute for Terrestrial Microbiology, Marburg, Germany — 2Department of Physics, Philipps-University Marburg, Germany — 3Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA — 4Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA — 5Institute for Theoretical Physics, Technical University Berlin, Germany
Coordinated dynamics of individual components in active matter are an essential aspect of life on all scales. Establishing a comprehensive, causal connection between intracellular, intercellular, and macroscopic behaviors has remained a major challenge due to limitations in data acquisition and analysis techniques suitable for multiscale dynamics. Here, we combine a high-throughput adaptive microscopy approach with machine learning, to identify key biological and physical mechanisms that determine distinct microscopic and macroscopic collective behavior phases which develop as Bacillus subtilis swarms expand over five orders of magnitude in space. Our experiments, continuum modeling, and particle-based simulations reveal that macroscopic swarm expansion is primarily driven by cellular growth kinetics, whereas the microscopic swarming motility phases are dominated by physical cell-cell interactions. These results provide a unified understanding of bacterial multi-scale behavioral complexity in swarms.