Species Richness Calculator
Calculate species richness indices and estimate total species diversity from sample data.
Input Parameters
Margalef: DMg = (S-1) / ln(N)
Chao1: S + Fâ²/(2Fâ)
Fâ = singletons, Fâ = doubletons
Observed Species Richness
15
species observed
Chao1 Estimate
17.0
Jackknife1
17.0
Margalef Index
2.633
Menhinick Index
1.050
Sampling Analysis
Completeness88.2%
Singletons2 species
Doubletons1 species
Species Density1.50/ha
Area Extrapolation26.7 species