Invasive species that destroy forests, ravage crops and cause extinctions are a major and growing threat worldwide, a landmark UN-backed assessment is poised to report.
in the Pacific, to mosquitoes exposing new regions to Zika, yellow fever, dengue and other diseases, tens of thousands of alien species have taken root—often literally—far from their place of origin.
The science advisory panel for the UN Convention on Biodiversity, known by its acronym IPBES, will release on Monday the most comprehensive assessment of so-called"alien species" ever assembled. Humans are to blame when non-native species wind up on the other side of the world, whether by accident or on purpose.
Scientists point to the pervasive spread of these species as hard evidence that rapid expansion of human activity has so radically altered natural systems as to tip Earth into a new geological epoch called the Anthropocene, or the"era of humans".are accidental arrivals, hitching rides in the ballast water of cargo ships, the containers in their holds, or in a tourist's suitcase.
The Everglades wetlands preserve in Florida is teeming with the destructive offspring of erstwhile pets and house plants, from five-meter Burmese pythons and walking catfish to Old World climbing fern and Brazilian pepper.
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