The Ecosystem Dynamics That Can Make or Break an Invasion

For decades, ecologists have puzzled over a mystery: Why do some natural habitats get overrun by invasive species while others seem to repel outside threats? In a classic 1958 book on the subject, the ecologist Charles Elton argued that an ecosystem with more species should be more resilient. In a diverse ecosystem, he wrote, so many species are already divvying up the available resources that…

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