Question

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Online Content: Site 1

How do invasive species spread? Identify three methods. (Site 1)

short paragraph

Answer 1

Invasive species spread in several ways: naturally by wind, water currents, or animals that carry seeds or organisms to new areas; through human-mediated transport such as shipping (ballast water and hull fouling), trade, and travel that move organisms across continents; and by intentional or accidental release from the pet and horticulture trades, aquaculture, or failed biological control efforts. These methods let species cross natural barriers and establish populations in ecosystems where they are not native.