This research documented 17 previously unknown species of fungi in South Korea’s Gayasan National Park. The discovery highlights how much biodiversity remains to be discovered even in well-studied areas. Understanding fungal diversity is crucial because these organisms play vital roles in forest health and ecosystem function. Impacts on everyday life: • Helps protect forest ecosystems by better understanding their fungal components • Contributes to the discovery of potentially useful fungi for medicine or industry • Improves our ability to monitor forest health and environmental changes • Aids in conservation efforts by documenting biodiversity • Advances our understanding of natural decomposition processes in forests