A previous research undertaken by Khaosa-ard et al. (1997) shows that there are environmental impacts witnessed in DINP that are partially a result of tourism development and tourists. There has been a declining state of the ecological system at the top most part of the Inthanon Mountain range, change in the ecology of the temperate wetland/moss bog in the Ang Ka area, seasonal tourism has also made it hard for the ecological system to handle the high rates of human intrusion, and people that dwell within the park also rely on the resources of the forests only exacerbating the situation.