From disordered Generalized Lotka-Volterra models to gut microbiome complexity
| When |
Oct 12, 2026
from 10:45 to 11:45 |
|---|---|
| Where | Salle Condorcet |
| Contact Name | Alexis Poncet |
| Attendees |
Ada Altieri |
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Inferring species interactions in highly heterogeneous ecological communities and developing a robust, predictive theory of ecological stability remain major challenges, due both to the amount of data required and the complexity of the underlying interaction network.
In this colloquium, I will present a high-dimensional version of the Lotka–Volterra model incorporating demographic fluctuations and heterogeneous interactions among species [1].
I will then explore its relevance to the human gut microbiome. Through dataset analysis from both healthy individuals and patients with inflammatory bowel disease, I will show that distinct physiological states of the gut microbiome map onto different noise-driven and disorder-driven regimes of the Generalized Lotka-Volterra model [2].
Finally, I will discuss extensions beyond the standard logistic-growth and purely competitive frameworks that can promote coexistence [3-4], thereby offering a new perspective on the long-standing diversity–stability debate.
[4] N. Patil, A. Altieri, arXiv:2607.24328 (2026)