Shannon diversity index calculator | Momchi's Genetics Tools™

The Shannon Diversity Index is a measure used to quantify the diversity of a community. It takes into account both the number of species (richness) and the evenness of their abundances. A higher value indicates greater diversity. It’s calculated using the formula: H = -Σ (pᵢ * ln pᵢ), where "pᵢ" is the proportion of individuals belonging to the i-th species.

Pielou’s Evenness Index (J) measures how evenly individuals are distributed across the species in a community, with values ranging from 0 (very uneven) to 1 (perfectly even). It is calculated using the formula: J=H/ln(S), where "H" is the Shannon's diversity index and "S" is the species richness (number of species).