A new scoring system looks at the pros—and cons—of introduced wildlife to consider if they should be removed.
around the world. Or it might just take too much time and money to restore the ecosystem to its historic state. Either way, ecologists have to pick their battles, and EICAT+ can help with strategizing the most meaningful interventions.
Using the framework involves surveying existing studies and descriptions of a species and applying what’s already known to rank its positive impacts on local biodiversity. Vimercati’s group designed a five-point scale that starts with “minimal” and builds up to “massive” .
With so many non-native wildlife gaining a foothold in new ecosystems, management tactics that consider the good and bad of a species will always be more accurate—and therefore more useful—than those that only see the bad. “Clearly, the priority is to identify negative impacts, because some of these alien species are extremely harmful,” says Vimercati. “But we shouldn’t deny there can be positive impacts, too.
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