Biodiversity Calculator
Calculate biodiversity indices including Shannon-Wiener diversity, Simpson's index, and species richness. Enter species abundance data and get instant ecological diversity metrics.
AnalysisBiodiversity Index Calculator
Enter species names and abundance counts to calculate diversity indices.
Species Richness (S)
Number of species present
Shannon-Wiener (H')
Accounts for richness and evenness
Simpson's (1-D)
Probability of interspecific encounter
Evenness (J')
How evenly individuals are distributed
Total individuals: · Dominance:
About these indices
Shannon-Wiener (H'): H' = -Σ pi ln(pi). Higher values indicate more diversity. Typically ranges 1.5-3.5.
Simpson's (1-D): 1 - Σ ni(ni-1) / N(N-1). Ranges 0-1. Higher values mean higher diversity.
Evenness (J'): J' = H' / ln(S). Ranges 0-1. Values near 1 indicate even distribution.
Featured Species
abetarda-do-saara
Ardeotis arabs
acantiza-castanho
Acanthiza pusilla
açor
Accipiter gentilis
açor-africano
Accipiter tachiro
açor-de-dorso-preto
Accipiter melanochlamys
açor-marrom-listrado
Accipiter fasciatus
açor-preto
Accipiter melanoleucus
águia-dominó
Aquila spilogaster
águia-real
Aquila chrysaetos
Ajeru
Aetobatus narinari
ajuga
Ajuga reptans
Alequim
Carcharodon carcharias
aloé-candelabro
Aloe arborescens
aloé-dos-cem-anos
Agave americana
ananaí
Amazonetta brasiliensis
andorinhão-australiano
Aerodramus terraereginae
andorinhão-de-cabo-verde
Apus alexandri
andorinhão-preto-africano
Apus barbatus
andorinhão-serrano
Aeronautes montivagus
Anta
Tapirus terrestris