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
Acanthize à croupion beige
Acanthiza reguloides
Acanthize à croupion roux
Acanthiza uropygialis
Acanthize mignon
Acanthiza pusilla
achillée mille-feuilles
Achillea millefolium
aconit napel
Aconitum napellus
acore
Acorus calamus
Actinodure à calotte noire
Actinodura sodangorum
Addax
Addax nasomaculatus
Aeschne Azurée
Aeshna caerulea
Agave d'Amérique
Agave americana
Agouti Ponctué
Dasyprocta punctata
agrostis commun
Agrostis capillaris
agrostis géant
Agrostis gigantea
Aigle de mer léopard
Aetobatus narinari
Aigle fascié
Aquila spilogaster
Aigle royal
Aquila chrysaetos
aigremoine eupatoire
Agrimonia eupatoria
alchémille des Alpes
Alchemilla alpina
Alcippe à joues brunes
Alcippe poioicephala
Alcippe brun
Alcippe brunneicauda