A Word From the Editors

We start this issue with two research articles. The first, by Bullinaria, “Simulating the Effect of Environmental Change on Evolving Populations,” uses simulations to study how populations can adapt to rapid environmental changes. It demonstrates the effect of model parameters on system robustness and the consequent care needed when modeling environmental change. The second article, by Collard, “Processionary Caterpillars at the Edge of Complexity,” explores a model of the collective behavior of pine tree processionary caterpillars. The article begins by modeling the caterpillars’ actual behaviors, then is extended to explore some more complex collective behaviors.

Following these contributions, we include a series of articles forming a special issue of extended papers from the Artificial Life conference held online and in Trento, Italy, in 2022 (Holler et al., 2022). Thanks to Silvia Holler, Barbora Hudcová, Richard Löffler, and Stuart Bartlett for serving as guest editors of this special issue.