The researchers studied how human activities affect plant diversity in a forest in Manipur, India. They looked at three different areas in the forest with varying levels of disturbance. They found that the mildly disturbed area had the highest number of tree species, while the moderately disturbed area had the most shrub and herb species. Overall, the forest had a high number of plant species, and the distribution of species was mostly random. The researchers also discovered that as altitude increased, the diversity of plant species decreased.