Species diversity estimates. A Estimated sample completeness curves as a function of order q between 0 and 2. B Sample-size-based rarefaction (solid lines) and extrapolation curves (dashed lines) up to double-sized samples. C Empirical diversity profiles (solid lines) and asymptotic estimates of diversity profiles (dotted lines). D Coverage-based rarefaction (solid lines) and extrapolation (dashed lines) curves up to the corresponding coverage value for double-sized samples (Cmax = 99.7 %).