Dynamical Complexity in Living Active Matter

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• Praneet Prakash (University of Cambridge, DAMTP)
• Thursday 13 February 2025, 13:00-14:00
• MR14, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.

If you have a question about this talk, please contact Anand Srinivasan.

Microorganisms inhabit highly fluctuating natural environments and survive in a low-nutrient resource baths. It is now well recognized that nutrient exchanges among microbes play a vital role in their survival. The existence of such exchanges raises fundamental questions about the dynamics of these interactions. In this talk, we will explore experimentally and theoretically a realization of such interactions in which active bacteria dynamically respond to the oxygen produced by immotile green algae through photosynthesis. Even in this simplest mixture of active-passive suspensions, we find a complex dynamics involving nutrient exchanges and enhanced algal diffusivity due to the bacteria. Towards the end of the talk, I will briefly discuss our investigations on collective behaviour in an active fluidic network of filamentous fungi, which presents another fascinating example of dynamical complexity in living systems.

This talk is part of the DAMTP BioLunch series.

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