I use joint species distribution models to investigate the relative importance of environmental conditions, in particular forest stand, climate, and forest management, on the occurrence and dynamics (colonization and extinction) of understory plants. The aim is to assess how these factors influence the occurrence and dynamics of understory vegetation in forest ecosystems across Sweden. Once the main predictors of species communities have been identified, I will produce projections of understory plant dynamics under various scenarios of climate change and forestry management. This approach allows for a comprehensive understanding of the intricate relationships between environmental conditions and the ecological processes governing understory plant communities. The knowledge gained from this study will contribute to informed decision-making in the context of sustainable forest management and climate change adaptation.