Species Richness, Community Organization, and Spatiotemporal Distribution of Earthworms in the Pineapple Agroecosystems of Tripura, India

Table 2

Performance of different nonparametric richness estimators.

Estimators	Observed richness ()	Estimated richness (Est.)	Estimation percent (%)
Chao 1	13	13.25	98
ACE	13	14.49	90
Jackknife 1	13	14.98	87
Chao 2	13	13.17	99
ICE	13	14.06	92
Jackknife 2	13	12.07	—
Michaelis-Menten	13	12.02	—
Bootstrap	13	14.46	90