Table 2. Scores and categories used to assess the vulnerability of California’s freshwater fish fauna to climate change.

Category	Score	Description
Critically vulnerable	<17	The species is extremely likely to be driven to extinction by year 2100 without conservation measures
Highly vulnerable	17–22	The species is on the path towards extinction as the result of climate change
Less vulnerable	23–37	The species is likely to decline or become more limited in distribution but extinction unlikely by 2100
Least vulnerable	28–32	The species is likely to be relatively unaffected by climate change, with range and populations remaining stable
Likely to benefit from climate change	>32	The species is likely to increase in range and abundance as the result ofclimate change