Trait contributions to fish community assembly emerge from trophic interactions in an individual-based model

► An individual-based model for fish community dynamics and assembly is proposed. ► The model integrates life history and trophic traits in a common simulation arena. ► Traits differed greatly in importance for assembly on environmental gradients. ► Dynamical patterns were shaped by the environment and emergent trait composition. ► Priority effects suppressed diversity and prevented selection on secondary traits.