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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Environ Toxicol Chem. 2017 Dec 29;37(3):871–883. doi: 10.1002/etc.4022

Fig. 4.

Fig. 4

Adequacy of the number of samples used to model the 5th percentile of the cumulative distribution of XC95 (XCD05). As sample size increases, the number of species (red squares, red vertical lines are the 95% confidence intervals (CI), right y-axis) included in the extirpation concentration distribution (XCD) increase and the XCD05 values (blue circles, blue vertical lines are the 95% CI, left y-axis) decrease. The mean XCD05 95% CI becomes fairly constant when ≥1,000 sites and 75−90 species are evaluated.