Assessing the change in biodiversity of Dewapara Sal (Shorea robusta) Forests of Bangladesh Md. Mizanur Rahman Information and Communication Technology Division, Bangladesh E-mail: rahmanboku@gmail.com Abstract The overall objective of the study was to assess the change in biodiversity of the Dewapara Sal forests of Bangladesh. Both primary and secondary data were used in this study. It was found that the exotic tree species replaced the indigenous species. Currently, climbers are absent in these forests. There is no trace of coarse woody debris and mycorrhizal association. Consequently, the species richness, the diversity index (Shannon-Wiener index) and evenness (Pielou's index) were very low. Due to poor species richness, the concentration of dominance (Simpson index) was very high. The Asiatic Black Bear, Sambar Deer, Spotted Dear, Barking Deer and Red Frog disappeared just four decades ago. The Leopard Cat, Fishing Cat, Jungle Cat, Indian Civet and Capped Langur reached extinction in recent years. The study recommended an integrated conservation strategy to avoid further degradation. Keywords: Sal Forest, extinction, species richness, conservation, diversity index, evenness Electronic copy available at: https://ssrn.com/abstract=4410316