Unlock insights into ecosystem health with our Shannon-Wiener Species Diversity Index Calculator. This essential ecological tool helps you quantify species richness and evenness, providing a clear picture of community structure. Easily compute the Shannon-Wiener Index (H) and Pielou's Evenness (J') by inputting your species data. Ideal for students, researchers, and environmental enthusiasts.
Formula:
The Shannon-Wiener Diversity Index (H) quantifies biodiversity by considering both the number of species and their relative abundances. Pielou's Evenness (J') then expresses how evenly individuals are distributed among the species.
- Shannon-Wiener Diversity Index (H):
H = - Σ (pi * ln(pi))pi: The proportion of individuals belonging to the i-th species (calculated asni / N)ni: The number of individuals in species iN: The total number of individuals across all speciesln: The natural logarithm
- Pielou's Evenness (J'):
J' = H / ln(S)H: The calculated Shannon-Wiener Diversity IndexS: The total number of species (species richness)ln: The natural logarithm