The scientists estimate that invasive species have caused or contributed to 60% of global extinctions, with nearly all of them happening on islands
Invasive alien species are travelling around the world at "unprecedented rates" because of humans, threatening native plants and animals with extinction while damaging human health and livelihoods, scientists have warned. Their cost to the world economy is estimated to be at least $423billion a year, having quadrupled every decade since 1970, though this has been described by the authors as "a huge underestimate" and "the tip of an iceberg".
The Assessment Report on Invasive Alien Species and their Control took four years to compile, with 86 scientists from 49 countries reviewing thousands of documents while hearing from indigenous communities, some of which are struggling to hold on to their cultural identities because of biological invasions.
"They can be mitigated, prevented, through effective management and we really stress that the most important management is prevention, preventing the species reaching new areas in the first place. But if they do reach new areas, then being prepared and having early detection and rapid response is absolutely critical."
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