Population trends by taxonomic groups and realm for terrestrial vertebrates (IMAGE)
Caption
Red asterisks near a vertebrate indicate clusters of populations of specific types (amphibians, small mammals, large mammals, fish, birds or reptiles) that are suffering extreme declines (16 systems) Blue asterisks indicate clusters of populations of specific types (amphibians, small mammals, large mammals, fish, birds or reptiles) that are growing significantly (8 systems) Distribution curves show the situation of typical populations in each system. After removal of extreme clusters of populations where there are significant increases or declines, the remaining populations are divided into: Yellow - indicates populations where there is little change. Green - indicates populations where, in general, the trend is towards a significant increase, though the data remains insufficient to conclude this with confidence. Orange - indicates populations where, in general, the trend is towards a significant decrease, though the data remains insufficient to conclude this with confidence.
Credit
McGill University
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