GARD’s population dynamics results in a cloud in the compositional space. (A) An example of a constant population dynamics (see Methods). This β exhibits 3 compotypes (NC = 3). Solid lines are a fit to a multi-species logistic equation . (B) Assemblies from the steady-state of this simulation (t = 4-5 × 104) were subjected to a principle-component-analysis (PCA), and the top two axis are plotted. Each point represents an assembly and the color marks whether it belongs to a compotype or to drift.