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In Tasmania, the strength of top-down control by the apex predator was found to be mediated by productivity and climate: devils suppressed cat activity and/or abundance in wet, forested areas (a). In drier, agricultural areas with more human settlements (b), bottom-up effects, including prey availability, were more important. High cat abundance, driven by rabbit abundance, may be preventing the recovery of the threatened eastern quoll [94,95]. (Online version in colour.)
