Table 8.

Floor and ceiling values, disturbance response, and interpolation formula for scoring final VMMI metrics. Final scores for each metric increase with disturbance

Metric	Raw data response to disturbance	Floor (5th percentile)	Ceiling (95th percentile)	Scoring formula (observed = metric value at a site)
Floristic quality assessment index	Decreases	6.94	38.59	(Observed–6.94)/(38.59–6.94) × 10
Relative importance native species	Decreases	44.34	100	(Observed–44.34)/(100–44.34)  × 10
Richness disturbance-tolerant Species	Increasesa	0	40.0	(40–Observed)/(40–0) × 10
Relative cover native monocots	Decreases	0.06	100	(Observed–0.06)/(100–0.06) × 10

Scoring based on calibration data (n = 911 sites) and applied to all data (n = 1138 sites)

^aScoring reversed for metrics where raw data increases with disturbance. Scores truncated to 0 or 10 if observed values fell outside the floor to ceiling range