Extrapolative Estimation of Benthic Diatoms (Bacillariophyta) Species Diversity in Different Marine Habitats of the Crimea (Black Sea)

Table 3

Comparative assessment of reliability of 4 estimators based on bias and precision metrics calculated for different parts of a randomized ascending sequence of samples (1 to 93).

Randomized row of successively increased number of samples	𝑆∞	Chao-2	Jack-knife-1	Jack-knife-2
Bias
Early 20% number of samples in a row	1.416	2.138	1.022	1.458
Further samples (21–60%)	0.032	0.355	0.340	0.505
Late samples (61–100%)	−0.017	0.126	0.121	0.181
All samples (1–100%) in a row	1.432	2.620	1.483	2.145
Precision
Early 20% number of samples in a row	1.181	2.088	0.421	0.884
Further samples (21–60%)	0.002	0.115	0.104	0.231
Late samples (61–100%)	0.001	0.031	0.029	0.065
All samples (1–100%) in a row	1.184	2.235	0.554	1.181