Table 7. Mean richness, ordinal scales, and additive ordinal scores used to identify land covers with higher biodiversity values. Vascular plants Butterflies Land cover Additive ordinal score Ordinal score Richness bins† Land cover/mean richness‡ Richness bins Land cover/mean richness‡ Agriculture 4 1 0–7.7 AG/0.0c 0–2.2 Introduced perennial grassland 5 2 7.8–15.4 IPG/11.2d 2.3–4.4 Forest 13 3 15.5–23.1 4.5–6.6 AG/4.6b IPG/6.0b Prairie 14 4 23.2–30.8 6.7–8.8 5 30.9–38.5 8.9–11 Forest /9.1b 6 38.6–46.2 Prairie/46.1b 11.1–13.2 7 46.3–53.9 13.3–15.4 8 54.0–61.6 Forest/60.9a 15.5–17.6 Prairie/17.2a 9 61.7–69.3 17.7–19.8 10 69.4–77.0 19.9–22.0 †We determined richness bins by dividing the sample richness range, e.g. for vascular plants (0–77), into 10 equal intervals. ‡Superscripts indicate significant differences (α ≤ 0.05) between habitats. Means with the same letter are not significantly different.