<p>The transformation of natural forests into simplified ecosystems has been extensively studied in terms of α-diversity, yet there is a notable lack of information regarding its effects on β-diversity. Here, we investigated the spatio-temporal dynamics of presence-absence and abundance-based taxonomic, functional, and phylogenetic β-diversity between and within the ant communities in an oak forest and an induced grassland. From 2007 to 2017, we deployed 1080 pitfall traps across these two environments. Spatial patterns were assessed through an ANOSIM to detect compositional differences between environments, simultaneously assessing the contribution of replacement and abundance/richness differences to these dissimilarities. We also implemented β-Hill numbers to evaluate the extent of differences among sampling events within each environment. Time-lag analysis was used to investigate whether communities are undergoing directional change or have reached a stable endpoint. Finally, an ecological trajectory analysis was used to ascertain if induced grasslands were changing to resemble natural forests. We found compositional differences between environments in all facets of biodiversity, driven primarily by the replacement component. Further, there was higher differentiation among years within the induced grassland, particularly when abundance was incorporated. Time-lag analysis revealed directional change only for the species composition. Finally, trajectory analyses showed no recovery trends in the disturbed vegetation for any dimension. These results indicate that habitat simplification rearranges all biodiversity facets, powered by the replacement of sensitive taxa by broad-generalist species. Furthermore, induced grassland showed more temporal heterogeneity, yet these changes do not suggest a reassembly of its original ant community.</p>