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Scientific - Scientists warn on invasive species threat
جمعه 9 دی 1390

Scientists warn on invasive species threat

   نوشته شده توسط: فریده جلیلوند    

 

Scientists warn on invasive species threat

LONDON (UPI) -- The full environmental impact of an invasive species may not be apparent until decades after its introduction, a report by European researchers has warned 

The team of European scientists preparing the report called on governments to tighten controls on international trade that involved potentially invasive species, the BBC reported Tuesday

"Alien invasions may be characterized by considerable time lags between the date of first introduction of a species to a new territory and its establishment as part of the regional flora or fauna," the scientists wrote

The researchers examined data on more than 3,300 invasive species including birds, reptiles, mammals, fungi and plants in 28 countries around Europe

"This lag in the cause-effect relationship would mean that, independent of existing biosecurity and trade regulations preventing further introductions, the seeds of future invasion problems have already been sown and can best be described as an 'invasion debt'," the report said

Damage from invasive species is one of the main causes of biodiversity loss, the scientists said, alongside other factors such as habitat loss and fragmentation

"Our results highlight that even if further unintended introductions could be successfully controlled by [current regulations and policies], the mid-term impacts of alien species on biodiversity and the economy might even be higher than currently expected," the report said

 

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