Table 9. Severity ratings for predictions of change in abundance of biophysical features and a possible conversion to percentages (after King et al. 2003).

Severity rating
Severity of change

Equivalent loss
(% decrease in abundance)

Equivalent gain
(% increase in abundance)

0
None

No change

No change

1
Negligible

0–20% loss

1–25% gain

2
Low

21–40% loss

26–67% gain

3
Moderate

41–60% loss

68–250% gain

4
Severe

61–80% loss

251–500% gain

5
Critically severe

81–100% loss

501% gain to ∞;
up to pest proportions