Morisita's overlap index
Morisita's overlap index, named after :ja:森下正明|Masaaki Morisita, is a statistical measure of dispersion of individuals in a population. It is used to compare overlap among samples. This formula is based on the assumption that increasing the size of the samples will increase the diversity because it will include different habitats.
Formula:
CD = 0 if the two samples do not overlap in terms of species, and CD = 1 if the species occur in the same proportions in both samples.
Horn's modification of the index is :
Note, not to be confused with Morisita’s index of dispersion.
