Table 5 Regression models and fit statistics for fish-based indices of biotic integrity (FIBI) scores and FIBI scores normalized to impairment threshold (FIBI_BCG4) for three hydrologic datasets: period of record (POR), long-term change (LTC), and short-term change (STC); see Table 1 for definitions of the biological metrics and Table 2 for definitions of the hydrologic metrics
Hydrologic dataset | Biological response metric regression equation | Pseudo-R2 | Censored values (%) | Root mean square error (%) |
|---|---|---|---|---|
POR | FIBI = 1.25dh24–0.168dl9–308 | 0.396 | 0.00 | 13.2 |
POR | FIBI_BCG4 = 0.0391dh24–0.00483dl9–10.1 | 0.539 | 0.00 | 0.299 |
LTC | FIBI = 65.7–6.10ma21–40.7ml18 + 45.8dh6 | 0.608 | 0.00 | 10.3 |
LTC | FIBI_BCG4 = 4.54–0.777ma1–1.03ml18–1.10ra5 | 0.717 | 0.00 | 0.224 |
STC | FIBI = 85.1–37.6ml5 + 9.80mh11 | 0.293 | 0.00 | 14.0 |
STC | FIBI_BCG4 = 0.456–1.05ma16 + 0.546ma33 + 1.26th3 | 0.423 | 0.00 | 0.327 |