From: Assessing biological dissimilarities between five forest communities
Dissimilarity | Equation | Details |
---|---|---|
Jaccard index | \( \frac{B+C}{A+B+C} \) | A represents the number of species shared by two communities, B and C are the number of species unique to each of the two communities |
Sørensen index | \( \frac{B+C}{2A+B+C} \) | |
Bray-Curtis index | \( \frac{\sum_{i=1}^n\mid {p}_i^a-{p}_i^b\mid }{\sum_{i=1}^n\left({p}_i^a+{p}_i^b\right)} \) | n is the number of species; \( {p}_i^a \) and \( {p}_i^b \) are the relative frequencies of species i in plots a and b |