Siccama senior lecturer in field ecology at yale school of the environment and director of research for yale forests. The threats were only assessed in terms of absence or presence and not regarding the degree of severity per threat. · although invasive alien species have long been recognized as a major threat to nature and people, until now there has been no comprehensive global review of the status, trends, drivers,. The invasive alien species report, produced by experts from 49 countries, says these intruders have been a major factor in 60 per cent of all extinctions and that they cost the global economy more than us$423 billion annually. · in a q&a, two yale invasive species experts explain the complex challenges posed by invasive species and solutions that may help control their spread. · invasive species outcompete, prey upon, and displace native species, interfering with how ecosystems work and reducing the benefits that humans get from surrounding ecosystems. · for every species on this cumulative imperiled species list, we determined whether they were threatened by each of the five drivers of biodiversity loss. They fuel more frequent wildfires, disrupt how nutrients and water move through the landscape, and spread new diseases. · in a new paper in people and nature, wade simmons, a phd candidate at cornell university, studied public perceptions of introduced species management. Simmons mainly works on biological control of water chestnut (trapa natans), an invasive species in new york. Marlyse duguid is the thomas j. · key findings that emerged from the ipbes-ias assessment are summarized here, but we urge readers to further explore and use the full richness of data and information in the assessment.

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