SUMMARY - Invasive Species, Human Trade, and Global Disruption
Invasive species are reshaping ecosystems worldwide. Zebra mussels carpet Great Lakes bottoms. Emerald ash borers devastate North American forests. Cane toads spread across Australia. These species, transported by human trade and travel, establish populations outside their native ranges andâfreed from their natural competitors, predators, and diseasesâtransform the ecosystems they enter. The globalization that moves goods and people also moves species, with consequences we're only beginning to understand.