Species Richness Calculator

Estimate true species richness using various statistical estimators including Chao1, ACE, and Jackknife methods.

Survey Data Input

Species Abundance (comma-separated counts)

Enter individual counts for each species observed

Number of Samples

Total Area (ha)

Chao1: S = Sobs + f1²/(2f2)

f1 = singletons, f2 = doubletons

Good Sampling

Observed

22.3

Estimated

89.9%

Complete

Chao1 Estimator

95% CI: 20.0 - 28.9

22.3

ACE Estimator

Abundance-based coverage

22.2

Jackknife 1

First-order estimate

22.4

Jackknife 2

Second-order estimate

23.3

Bootstrap

Resampling estimate

35.8

Singletons (f1)3

Doubletons (f2)2

Margalef Index3.381

Menhinick Index1.204

Sample Coverage98.9%

Rarefied to 10016.6 species