Before revision:  We exemplify our method using data on tropical tree species from a 50ha plot in Barro Colorado Island (BCI), Panama, using all individuals . - Main conclusions: The new formula of SAR better describes the pattern of SAR for a small area and for the large area it is equivalent to the well-known log-log linear pattern .
After revision:  We exemplify our method using data on tropical tree species from a 50ha plot in Barro Colorado Island (BCI), Panama, using all individuals .