Diversity Metrics

Some diversity indicators

Different indices for describing the species diversity of communities have been designed by various scientists. These diversity metrics can assess the richness, the distribution, the functional level or the originality of these communities. We list some of them below:

 Index Measures Formula Species Richness S Number of species Shannon Wiener H Richness and eveness $-\sum _{i}{p}_{i}\mathrm{log}\left({p}_{i}\right)$ Simpson SI Richness and eveness ${\left(\sum _{i}{p}_{i}^{2}\right)}^{-1}$ Hill Generalized Entropy Richness and eveness ${\left(\sum _{i}{p}_{i}^{\alpha }\right)}^{\genfrac{}{}{0.1ex}{}{1}{1-\alpha }}$ Trophic Index Functional Value $\sum _{i}{T}_{i}{p}_{i}$ Rao's quadratic entropy variability from distance d between species $\sum _{i}\sum _{j}{d}_{ij}{p}_{i}{p}_{j}$ Weitzman index originality

Updated on 02/02/2016