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Posted Tue Feb 1 2011: from
PhysOrg:
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Surprising approach could help rescue fragile ecosystems and halt cascades of extinctions http://apocadocs.com/s.pl?1296569634
Feral pigs introduced to the Galapagos Archipelago shortly after Charles Darwin's historical visit have damaged the ecosystem of Santiago Island, causing, it is believed, the extinction or imperilment of a number of species. The complete removal of the pigs 11 years ago is beginning to restore balance to the island. Two Northwestern University scientists have developed a mathematical model that supports the management choices in perturbed ecosystems, such as the Galápagos, and illustrates how human intervention may effectively aid species conservation efforts. The selective suppression or removal of one or more species in a troubled ecosystem can save many more species.... Motter explained further, "We find that extinction cascades can often be mitigated by suppressing -- rather than enhancing -- the populations of specific species. In numerous cases, it is predicted that even the proactive removal of a species that would otherwise be extinct by a cascade can prevent the extinction of other species."
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[Read more stories about:
sixth extinction, sustainability, species restoration]
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