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
Abura Koumori
Pipistrellus abramus
Akabou
Ziphius cavirostris
Amaminokurousagi
Pentalagus furnessi
Aosuji tobiei
Aetomylaeus nichofii
Ezo Naki-Usagi
Ochotona hyperborea
Hachiware
Alopias superciliosus
Hase iruka
Delphinus delphis
Herazame
Apristurus platyrhynchus
Hohojirozame
Carcharodon carcharias
Kaguya-kōmori
Myotis longicaudatus
Kobuha kujira
Mesoplodon densirostris
Koyama Koumori
Nyctalus furvus
KubiwaKoumori
Eptesicus japonensis
Kuro Ooabura Koumori
Hypsugo alaschanicus
Madara tobiei
Aetobatus narinari
Momojiro Koumori
Myotis macrodactylus
MoriaburaKoumori
Pipistrellus endoi
Nihon Nousagi
Lepus brachyurus
Nihon Usagi Koumori
Plecotus sacrimontis
Nitari
Alopias pelagicus