Assessment of Invasive Species Severity along the Nature Trail at the Doi Chiang Dao Biosphere Reserve, Chiang Mai Province

Background and Objectives: Doi Chiang Dao Biosphere Reserve has been officially declared as the fifth Biosphere Reserve of Thailand, representing a critically important terrestrial ecosystem due to its significant number of endangered and endemic plant species. This designation highlights its crucial role in biodiversity conservation at both national and global scales. However, the area faces increasing threats from human activities, habitat degradation, and biological invasions. Among these thr