In ecoregion I1, two metrics were eliminated because they had very small ranges, and four metrics were excluded by the CV test. Using the Mann–Whitney U test (p < 0.05), 11 metrics were excluded. Furthermore, box and whisker plots tests indicated that six metrics did not have high sensitivity (IQ 2). Of the remaining 22 metrics, redundancy tests showed that seven metrics from the richness category were highly correlated with the total number of taxa (r > 0.70, p < 0.01), and one metric was correlated with the total number taxa (r = 0.662, p < 0.01).