Figure 1. Sampling of “priority protection species”.

The adequacy of sampling was based on richness estimator (Chao estimator) for the internet (raw and adjusted, N = 236 samples; see text for details) and schoolchildren (raw and adjusted, N = 250 samples; see text for details). All the curves reached a plateau, indicating that we adequately sampled the diversity of “priority protection species” both for the internet and for schoolchildren.